在 Windwos 10、PHP 7.1.12 下 基于 Yii 2 Starter Kit，复制后台应用为接口应用，实现 RESTful Web 服务的流程

1、在 Windows PowerShll 中，进入 E:/wwwroot/cmcp-api 目录，如图1

2、新建应用api，复制backend目录为api，如图2

3、编辑 /.env.dist，新增 api 相关的配置，此为提交至Git版本控制的配置文件，如图3

API_HOST_INFO         = http://api.yii2-starter-kit.dev
#API_HOST_INFO         = http://yii2-starter-kit.dev
#API_BASE_URL          = /api/web
API_COOKIE_VALIDATION_KEY = <generated_key>

4、编辑 /.env，新增 api 相关的配置，此为实际生效的配置文件，如图4

API_HOST_INFO         = http://www.cmcp-api.localhost
#API_HOST_INFO         = http://yii2-starter-kit.dev
#API_BASE_URL          = /api/web
API_COOKIE_VALIDATION_KEY = <generated_key>

5、编辑 /common/config/bootstrap.php，配置接口应用的别名，如图5

Yii::setAlias('@api', realpath(__DIR__.'/../../api'));
Yii::setAlias('@apiUrl', env('API_HOST_INFO') . env('API_BASE_URL') );

6、编辑 /common/config/base.php，配置接口应用的语言包文件，如图6

'api'=>'api.php',

7、新建接口应用的中文语言包文件，复制 /common/messages/zh/backend.php 为 /common/messages/zh/api.php(如果需要支持其他的语言，可以在其他的语言目录下新建)，如图7

8、编辑 /common/config/base.php，配置接口应用的URL的解析与生成，如图8

        'urlManagerApi' => /yii/helpers/ArrayHelper::merge(
            [
                'hostInfo' => env('API_HOST_INFO'),
                'baseUrl' => env('API_BASE_URL'),
            ],
            require(Yii::getAlias('@api/config/_urlManager.php'))
        ),

9、编辑 /console/controllers/AppController.php，搜索此文件有6处backend，则相应复制3份为api，如图9

    public $writablePaths = [
        '@common/runtime',
        '@frontend/runtime',
        '@frontend/web/assets',
        '@backend/runtime',
        '@backend/web/assets',
        '@api/runtime',
        '@api/web/assets',
        '@storage/cache',
        '@storage/web/source'
    ];

    public $executablePaths = [
        '@backend/yii',
        '@api/yii',
        '@frontend/yii',
        '@console/yii',
    ];

10、编辑 /autocompletion.php，新增接口应用相关的配置，如图10

 * @property yii/web/UrlManager $urlManagerApi UrlManager for api application.

11、在目录api中搜索backend/、backend/、=> ‘backend’、BACKEND，严格匹配大小写，将其分别替换为api/、api/、=> ‘api’、API，如图11

backend/ 替换为： api/
backend/ 替换为： api/
=> 'backend' 替换为： => 'api'
BACKEND 替换为： => API

12、在 /tests 目录中，还有相应的与新增接口应用相关的配置，此部分暂缓一下，到需要进行自动化测试的时候，再来进行配置了。查看 /api/web/index-test.php，如图12

13、在 Windows PowerShll 中，进入 E:/wwwroot/cmcp-api 目录，再次运行命令：php console/yii app/setup，设置可写、可执行权限，如图13

14、在 Nginx 配置文件中新增虚拟主机，重启Nginx，如图14

## API ##
server {
    listen 80; ## 监听 ipv4 上的 80 端口
    # listen [::]:80 default_server ipv6only=on; ## 监听 ipv6 上的 80 端口

    root E:/wwwroot/cmcp-api/api/web;
    index index.php index.html;

    server_name www.cmcp-api.localhost;

    charset utf-8;

	access_log logs/www.cmcp-api.localhost.access.log;
	error_log logs/www.cmcp-api.localhost.error.log;

    client_max_body_size 128M;

    # There is a VirtualBox bug related to sendfile that can lead to
    # corrupted files, if not turned-off on Vagrant based setup
    # sendfile off;

    location / {
		# 如果找不到真实存在的文件，把请求分发至 index.php
        try_files $uri $uri/ /index.php?$args;
    }

    # location ~* ^.+/.(jpg|jpeg|gif|png|ico|css|pdf|ppt|txt|bmp|rtf|js)$ {
    #     access_log off;
    #     expires max;
    # }

    location ~ /.php$ {
        fastcgi_split_path_info ^(.+/.php)(/.+)$;
        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
        fastcgi_pass php-fpm;
        fastcgi_index index.php;
        include fastcgi_params;
    }

	location ~ //.(ht|svn|git) {
        deny all;
    }

}

15、在 hosts 文件中新增配置，如图15

# 内容管控平台接口
127.0.0.1 cmcp-api.localhost www.cmcp-api.localhost frontend.cmcp-api.localhost backend.cmcp-api.localhost storage.cmcp-api.localhost

16、打开 http://www.cmcp-api.localhost， 如果出现样式文件加载响应404的情况，可以删除 /api/web/assets 下的所有子目录，如图16

17、准备将创建页面的功能基于接口实现，如图17

18、调整 Page 模型的相关结构，实现模型分层，参考网址：http://www.shuijingwanwq.com/2017/08/15/1713/ ，如图18

19、打开网址：http://frontend.cmcp-api.localhost/gii ，如图19

20、基于数据库表 ca_page 建立相应模型，如图20

21、在common目录中新建logics目录，用于MySQL模型的逻辑层所在目录，如图21

22、复制 /common/models/Page.php 至 /common/logics/Page.php，如图22

<?php namespace common/models; use Yii; use yii/behaviors/SluggableBehavior; use yii/behaviors/TimestampBehavior; use yii/db/ActiveRecord; /** * This is the model class for table "page". * * @property integer $id * @property string $slug * @property string $title * @property string $body * @property string $view * @property integer $status * @property integer $created_at * @property integer $updated_at */ class Page extends ActiveRecord { const STATUS_DRAFT = 0; const STATUS_PUBLISHED = 1; /** * @inheritdoc */ public static function tableName() { return '{{%page}}'; } /** * @inheritdoc */ public function behaviors() { return [ TimestampBehavior::className(), 'slug' => [
                'class' => SluggableBehavior::className(),
                'attribute' => 'title',
                'ensureUnique' => true,
                'immutable' => true
            ]
        ];
    }

    /**
     * @inheritdoc
     */
    public function rules()
    {
        return [
            [['title', 'body'], 'required'],
            [['body'], 'string'],
            [['status'], 'integer'],
            [['slug'], 'unique'],
            [['slug'], 'string', 'max' => 2048],
            [['title'], 'string', 'max' => 512],
            [['view'], 'string', 'max' => 255]
        ];
    }

    /**
     * @inheritdoc
     */
    public function attributeLabels()
    {
        return [
            'id' => Yii::t('common', 'ID'),
            'slug' => Yii::t('common', 'Slug'),
            'title' => Yii::t('common', 'Title'),
            'body' => Yii::t('common', 'Body'),
            'view' => Yii::t('common', 'Page View'),
            'status' => Yii::t('common', 'Active'),
            'created_at' => Yii::t('common', 'Created At'),
            'updated_at' => Yii::t('common', 'Updated At'),
        ];
    }
}

23、基于 diff ，编辑 /common/logics/Page.php，如图23

24、在common/logics目录中的MySQL模型文件为业务逻辑相关，继承至 /common/models/Page 数据层，如图24

<?php namespace common/logics; use Yii; use yii/behaviors/SluggableBehavior; use yii/behaviors/TimestampBehavior; class Page extends /common/models/Page { const STATUS_DRAFT = 0; const STATUS_PUBLISHED = 1; /** * @inheritdoc */ public function behaviors() { return [ TimestampBehavior::className(), 'slug' => [
                'class' => SluggableBehavior::className(),
                'attribute' => 'title',
                'ensureUnique' => true,
                'immutable' => true
            ]
        ];
    }

    /**
     * @inheritdoc
     */
    public function rules()
    {
        return [
            [['title', 'body'], 'required'],
            [['body'], 'string'],
            [['status'], 'integer'],
            [['slug'], 'unique'],
            [['slug'], 'string', 'max' => 2048],
            [['title'], 'string', 'max' => 512],
            [['view'], 'string', 'max' => 255],
        ];
    }

}

25、点击Model Generator下的Start按钮，生成模型Page，命名空间为common/models，此时需支持国际化，覆盖/common/models/Page.php，如图25

26、编辑 /common/config/base.php，当源语言和目标语言相同时，是否强制进行消息翻译，默认为假，设置为真，如图26

                '*'=> [
                    'class' => 'yii/i18n/PhpMessageSource',
                    'forceTranslation' => true,
                    'basePath'=>'@common/messages',
                    'fileMap'=>[
                        'common'=>'common.php',
                        'backend'=>'backend.php',
                        'api'=>'api.php',
                        'frontend'=>'frontend.php',
                    ],
                    'on missingTranslation' => ['/backend/modules/i18n/Module', 'missingTranslation']
                ],

27、新建 /common/messages/en/model/page.php，支持目标语言为英语美国时的消息翻译，如图27

return [
    'ID' => 'ID',
    'Slug' => 'Slug',
    'Title' => 'Title',
    'Body' => 'Body',
    'View' => 'Page View',
    'Status' => 'Active',
    'Created At' => 'Created At',
    'Updated At' => 'Updated At',
];

28、新建 /common/messages/zh/model/page.php，支持目标语言为简体中文时的消息翻译，如图28

return [
    'ID' => 'ID',
    'Slug' => '别名',
    'Title' => '标题',
    'Body' => '内容',
    'View' => '页面浏览',
    'Status' => '活动',
    'Created At' => '创建时间',
    'Updated At' => '更新时间',
];

29、新建 /api/models/Page.php，在api/models目录中的MySQL模型文件为业务逻辑相关(仅与api相关)，继承至 /common/logics/Page 逻辑层，如图29

30、复制/api/models/Page.php 至 /frontend/models/Page.php、/backend/models/Page.php，调整为各自的命名空间，如图30

31、在 api 应用中搜索 use common/models/Page;，替换为：use api/models/Page;，在前台、后台应用中同样类似处理，如图31

32、当本地设置为简体中文时，打开 http://backend.cmcp-api.localhost/page/create ，翻译功能可用，如图32

33、编辑个人信息，设置本地为英语美国，如图33

34、当本地设置为英语美国时，再次打开 http://backend.cmcp-api.localhost/page/create ，翻译功能可用，如图34

35、开始实现 RESTful Web 服务，参考网址：http://www.shuijingwanwq.com/2016/11/28/1457/ ，如图35

36、打开网址：http://backend.cmcp-api.localhost/article/create ，创建文章，如图36

37、在 Postman 中，GET http://frontend.cmcp-api.localhost/api/v1/articles ，此为自带的RESTful Web 服务，响应结果，如图37

{
    "items": [
        {
            "id": 1,
            "slug": "biao-ti20180104-0",
            "category_id": 1,
            "title": "标题20180104-0",
            "body": "

内容

",
            "published_at": 1515031309,
            "_links": {
                "self": {
                    "href": "http://frontend.cmcp-api.localhost/api/v1/articles/1"
                }
            }
        }
    ],
    "_links": {
        "self": {
            "href": "http://frontend.cmcp-api.localhost/api/v1/articles?page=1"
        }
    },
    "_meta": {
        "totalCount": 1,
        "pageCount": 1,
        "currentPage": 1,
        "perPage": 20
    }
}

38、RESTful Web 服务，建议基于一个单独的接口应用来实现，而不是基于前台应用中的一个api模块来实现，这样可以更为方便地维护你的WEB应用程序，如图38

39、新建目录：/api/rests，此目录将做为 RESTful Web 服务的操作方法类目录，如图39

40、编辑控制器类 /api/controllers/PageController.php ，控制器类扩展自 [[yii/rest/ActiveController]]。 通过指定 [[yii/rest/ActiveController::modelClass|modelClass]] 作为 api/models/Page， 控制器就能知道使用哪个模型去获取和处理数据。如图40

namespace api/controllers;

use yii/rest/ActiveController;

class PageController extends ActiveController
{
    public $modelClass = 'api/models/Page';
}

41、配置URL规则，修改有关在应用程序配置的urlManager组件的配置，编辑：/api/config/_urlManager.php，如图41

return [
    'class' => yii/web/UrlManager::class,
    'enablePrettyUrl' => true,
    'showScriptName' => false,
    'rules' => [
        [
            'class' => 'yii/rest/UrlRule',
            'controller' => ['page'],
        ],
    ],
];

42、在 Postman 中，GET http://www.cmcp-api.localhost/pages ，403响应，如图42

{
    "name": "Forbidden",
    "message": "Login Required",
    "code": 0,
    "status": 403,
    "type": "yii//web//ForbiddenHttpException"
}

43、编辑 /api/config/web.php，注释附加的行为globalAccess，有待后期调整(验证、授权)，如图43

    /*
    'as globalAccess' => [
        'class' => common/behaviors/GlobalAccessBehavior::class,
        'rules' => [
            [
                'controllers' => ['sign-in'],
                'allow' => true,
                'roles' => ['?'],
                'actions' => ['login']
            ],
            [
                'controllers' => ['sign-in'],
                'allow' => true,
                'roles' => ['@'],
                'actions' => ['logout']
            ],
            [
                'controllers' => ['site'],
                'allow' => true,
                'roles' => ['?', '@'],
                'actions' => ['error']
            ],
            [
                'controllers' => ['debug/default'],
                'allow' => true,
                'roles' => ['?'],
            ],
            [
                'controllers' => ['user'],
                'allow' => true,
                'roles' => ['administrator'],
            ],
            [
                'controllers' => ['user'],
                'allow' => false,
            ],
            [
                'allow' => true,
                'roles' => ['manager'],
            ]
        ]
    ]
    */

44、在 Postman 中，GET http://www.cmcp-api.localhost/pages ，200响应，如图44

[
    {
        "id": 1,
        "slug": "about",
        "title": "About",
        "body": "Lorem ipsum dolor sit amet, consectetur adipiscing elit.",
        "view": null,
        "status": 1,
        "created_at": 1514860785,
        "updated_at": 1514860785
    }
]

45、调用API服务后返回数据采用统一格式，返回的HTTP状态码为20x，代表调用成功；返回4xx或5xx的HTTP状态码代表调用失败。调整200响应的返回数据格式，与403响应一致，至少包含：”message”,”code”，新建语言包文件：/api/messages/zh/app.php(响应成功)、/api/messages/zh/error.php(响应失败)，如图45

return [
    10000 => 'success',
    10001 => '获取页面列表成功',
];

46、版本化的实现，参考网址：https://github.com/yiisoft/yii2/blob/master/docs/guide-zh-CN/rest-versioning.md ，编辑 /api/controllers/PageController.php，删除 modelClass，如图46

<?php

namespace api/controllers;

use yii/rest/ActiveController;

class PageController extends ActiveController
{
}

47、把每个主要版本的 API 实现在一个单独的模块 ID 的主版本号，基于 Gii 生成模块 v1，打开网址：http://frontend.cmcp-api.localhost/gii/module ，如图47

48、新建 /api/modules/v1/models/Page.php，继承至 /api/models/Page.php，如图48
注：/api/modules/v1/models/Page(仅用于 v1 模块) > /api/models/Page(仅用于 api 应用) > /common/logics/Page.php(可用于 api、frontend 等多个应用) > /common/models/Page.php(仅限于 Gii 生成) > /yii/db/ActiveRecord

<?php

namespace api/modules/v1/models;

class Page extends /api/models/Page
{

}

49、/api/modules/v1/controllers/DefaultController.php 重命名为 /api/modules/v1/controllers/PageController.php，编辑代码，如图49
注：/api/modules/v1/controllers/PageController.php(仅用于 v1 模块) > /api/controllers/PageController.php(仅用于 api 应用) > /yii/rest/ActiveController

<?php

namespace api/modules/v1/controllers;

/**
 * Page controller for the `v1` module
 */
class PageController extends /api/controllers/PageController
{
    public $modelClass = 'api/modules/v1/models/Page';
}

50、要在应用中使用模块，只需要将模块加入到应用主体配置的[[yii/base/Application::modules|modules]]属性的列表中， 如下代码的应用主体配置 使用 v1 模块，编辑 /api/config/web.php，如图50

    'modules' => [
        'v1' => [
            'class' => api/modules/v1/Module::class,
        ],
        'i18n' => [
            'class' => api/modules/i18n/Module::class,
            'defaultRoute' => 'i18n-message/index'
        ]
    ],

51、配置URL规则，修改有关在应用程序配置的urlManager组件的配置，以支持 v1 模块，编辑：/api/config/_urlManager.php，如图51
注：通过配置 only 选项来明确列出哪些行为支持，v1/page 仅支持：’index’, ‘update’, ‘delete’, ‘options’

<?php return [ 'class' => yii/web/UrlManager::class,
    'enablePrettyUrl' => true,
    'enableStrictParsing' => true,
    'showScriptName' => false,
    'rules' => [
        [
            'class' => 'yii/rest/UrlRule',
            'controller' => ['v1/page'],
            'only' => ['index', 'update', 'delete', 'options'],
        ],
    ],
];

52、在 Postman 中，GET http://www.cmcp-api.localhost/v1/pages ，200响应，如图52

[
    {
        "id": 1,
        "slug": "about",
        "title": "About",
        "body": "Lorem ipsum dolor sit amet, consectetur adipiscing elit.",
        "view": null,
        "status": 1,
        "created_at": 1514860785,
        "updated_at": 1514860785
    }
]

53、测试 only 选项，在 Postman 中，GET http://www.cmcp-api.localhost/v1/pages/1 ，405响应(不被允许的方法。因为 ‘view’ 行为不被支持)，测试通过，如图53

54、配置URL规则，修改有关在应用程序配置的urlManager组件的配置，以支持 v1 模块，编辑：/api/config/_urlManager.php，如图54
注：取消配置 only 选项，以后续支持所有行为

<?php return [ 'class' => yii/web/UrlManager::class,
    'enablePrettyUrl' => true,
    'enableStrictParsing' => true,
    'showScriptName' => false,
    'rules' => [
        [
            'class' => 'yii/rest/UrlRule',
            'controller' => ['v1/page'],
        ],
    ],
];

55、在 Postman 中，GET http://www.cmcp-api.localhost/v1 ，404响应，格式为HMTL，如图55

<!DOCTYPE html>
<html lang="en-US">
    <head>
        <meta charset="UTF-8">
        <meta content='width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no' name='viewport'>
        <meta name="csrf-param" content="_csrf">
        <meta name="csrf-token" content="MtUm8pVxEHfmqhYMruxdUyScsktaMyFDc350jW_XR7dzmGqaoDRyT7bPc13M2W0AVNuGISJSbQUYOFn9LKNzgQ==">
        <title>Not Found (#404)</title>
        <link href="/assets/95b60493/themes/smoothness/jquery-ui.css?v=1514958071" rel="stylesheet">
        <link href="/assets/7635f0fe/css/bootstrap.css?v=1512021376" rel="stylesheet">
        <link href="/assets/1ee3df8/css/font-awesome.min.css?v=1512021376" rel="stylesheet">
        <link href="/assets/541f775b/css/AdminLTE.min.css?v=1512021373" rel="stylesheet">
        <link href="/assets/541f775b/css/skins/_all-skins.min.css?v=1512021373" rel="stylesheet">
        <link href="/css/style.css?v=1512021342" rel="stylesheet">

    </head>
    <body class=" skin-blue ">
    </body>
</html>

56、对于404响应格式为HTML的解决，编辑 /api/config/web.php，设置默认的响应格式为JSON，如图56

        'response' => [
            'format' => yii/web/Response::FORMAT_JSON,
        ],

57、在 Postman 中，GET http://www.cmcp-api.localhost/v1 ，404响应，格式为JSON，如图57

{
    "name": "Not Found",
    "message": "Page not found.",
    "code": 0,
    "status": 404,
    "type": "yii//web//NotFoundHttpException"
}

58、数据序列化的实现，在响应主体内包含分页信息来简化客户端的开发工作，编辑 /api/controllers/PageController.php，如图58

<?php namespace api/controllers; use yii/rest/ActiveController; class PageController extends ActiveController { public $serializer = [ 'class' => 'yii/rest/Serializer',
        'collectionEnvelope' => 'items',
    ];
}

59、在 Postman 中，GET http://www.cmcp-api.localhost/v1/pages ，200响应，在响应主体内包含分页信息，如图59

{
    "items": [
        {
            "id": 1,
            "slug": "about",
            "title": "About",
            "body": "Lorem ipsum dolor sit amet, consectetur adipiscing elit.",
            "view": null,
            "status": 1,
            "created_at": 1514860785,
            "updated_at": 1514860785
        }
    ],
    "_links": {
        "self": {
            "href": "http://www.cmcp-api.localhost/v1/pages?page=1"
        }
    },
    "_meta": {
        "totalCount": 1,
        "pageCount": 1,
        "currentPage": 1,
        "perPage": 20
    }
}

60、RESTful APIs 通常是无状态的，因此，配置 user 应用组件，编辑 /api/config/web.php，如图60
注：配置user 应用组件:
设置 [[yii/web/User::enableSession|enableSession]] 属性为 false.
设置 [[yii/web/User::loginUrl|loginUrl]] 属性为null 显示一个HTTP 403 错误而不是跳转到登录界面.

        'user' => [
            'class' => yii/web/User::class,
            'identityClass' => common/models/User::class,
            'enableSession' => false,
            'loginUrl' => null,
            'enableAutoLogin' => false,
            'as afterLogin' => common/behaviors/LoginTimestampBehavior::class
        ],

61、复制目录 /vendor/yiisoft/yii2/rest 下的 Action.php、IndexAction.php、ViewAction.php、CreateAction.php、UpdateAction.php、DeleteAction.php、Serializer.php 至目录 /api/rests/page，如图61

62、如果为多个单词组合的目录，建议目录使用小写+下划线，参考网址：https://github.com/hfcorriez/fig-standards/blob/master/accepted/zh_CN/PSR-0.md ，编辑 /api/controllers/PageController.php，如图62

<?php namespace api/controllers; use yii/rest/ActiveController; class PageController extends ActiveController { public $serializer = [ 'class' => 'api/rests/page/Serializer',
        'collectionEnvelope' => 'items',
    ];

    /**
     * @inheritdoc
     */
    public function actions()
    {
        return [
            'index' => [
                'class' => 'api/rests/page/IndexAction',
                'modelClass' => $this->modelClass,
                'checkAccess' => [$this, 'checkAccess'],
            ],
            'view' => [
                'class' => 'api/rests/page/ViewAction',
                'modelClass' => $this->modelClass,
                'checkAccess' => [$this, 'checkAccess'],
            ],
            'create' => [
                'class' => 'api/rests/page/CreateAction',
                'modelClass' => $this->modelClass,
                'checkAccess' => [$this, 'checkAccess'],
                'scenario' => $this->createScenario,
            ],
            'update' => [
                'class' => 'api/rests/page/UpdateAction',
                'modelClass' => $this->modelClass,
                'checkAccess' => [$this, 'checkAccess'],
                'scenario' => $this->updateScenario,
            ],
            'delete' => [
                'class' => 'api/rests/page/DeleteAction',
                'modelClass' => $this->modelClass,
                'checkAccess' => [$this, 'checkAccess'],
            ],
            'options' => [
                'class' => 'yii/rest/OptionsAction',
            ],
        ];
    }
}

注：如果仅支持较少的行为，可以选择下面的方案，例

    public function actions()
    {
        $actions = parent::actions();
        
        $actions['view']['class'] = 'api/rests/page/ViewAction';

        return $actions;
    }

63、编辑 /api/rests/page/IndexAction.php，调整命名空间、继承关系、查询条件等，如图63

<?php
/**
 * @link http://www.yiiframework.com/
 * @copyright Copyright (c) 2008 Yii Software LLC
 * @license http://www.yiiframework.com/license/
 */

namespace api/rests/page;

use Yii;
use yii/data/ActiveDataProvider;

/**
 * IndexAction implements the API endpoint for listing multiple models.
 *
 * For more details and usage information on IndexAction, see the [guide article on rest controllers](guide:rest-controllers).
 *
 * @author Qiang Wang <shuijingwanwq@163.com>
 * @since 1.0
 */
class IndexAction extends /yii/rest/IndexAction
{
    const STATUS_INACTIVE = 0; //状态：不活跃
    const STATUS_ACTIVE = 1; //状态：活跃

    /**
     * Prepares the data provider that should return the requested collection of the models.
     * @return ActiveDataProvider
     */
    protected function prepareDataProvider()
    {
        $requestParams = Yii::$app->getRequest()->getBodyParams();
        if (empty($requestParams)) {
            $requestParams = Yii::$app->getRequest()->getQueryParams();
        }

        $filter = null;
        if ($this->dataFilter !== null) {
            $this->dataFilter = Yii::createObject($this->dataFilter);
            if ($this->dataFilter->load($requestParams)) {
                $filter = $this->dataFilter->build();
                if ($filter === false) {
                    return $this->dataFilter;
                }
            }
        }

        if ($this->prepareDataProvider !== null) {
            return call_user_func($this->prepareDataProvider, $this, $filter);
        }

        /* @var $modelClass /yii/db/BaseActiveRecord */
        $modelClass = $this->modelClass;

        $query = $modelClass::find()->where(['status' => self::STATUS_ACTIVE]);
        if (!empty($filter)) {
            $query->andWhere($filter);
        }

        return Yii::createObject([
            'class' => ActiveDataProvider::className(),
            'query' => $query,
            'pagination' => [
                'params' => $requestParams,
            ],
            'sort' => [
                'params' => $requestParams,
            ],
        ]);
    }
}

64、编辑 /api/rests/page/Serializer.php，调整命名空间、继承关系、响应结构(响应成功：”code”: 10000,”message”,”data”；响应失败：”code”: 不等于10000的其他数字,”message”)等，如图64

<?php
/**
 * @link http://www.yiiframework.com/
 * @copyright Copyright (c) 2008 Yii Software LLC
 * @license http://www.yiiframework.com/license/
 */

namespace api/rests/page;

use Yii;
use yii/data/DataProviderInterface;

/**
 * Serializer converts resource objects and collections into array representation.
 *
 * Serializer is mainly used by REST controllers to convert different objects into array representation
 * so that they can be further turned into different formats, such as JSON, XML, by response formatters.
 *
 * The default implementation handles resources as [[Model]] objects and collections as objects
 * implementing [[DataProviderInterface]]. You may override [[serialize()]] to handle more types.
 *
 * @author Qiang Wang <shuijingwanwq@163.com>
 * @since 1.0
 */
class Serializer extends /yii/rest/Serializer
{
    /**
     * Serializes a data provider.
     * @param DataProviderInterface $dataProvider
     * @return array the array representation of the data provider.
     */
    protected function serializeDataProvider($dataProvider)
    {
        if ($this->preserveKeys) {
            $models = $dataProvider->getModels();
        } else {
            $models = array_values($dataProvider->getModels());
        }
        $models = $this->serializeModels($models);

        if (($pagination = $dataProvider->getPagination()) !== false) {
            $this->addPaginationHeaders($pagination);
        }

        if ($this->request->getIsHead()) {
            return null;
        } elseif ($this->collectionEnvelope === null) {
            return $models;
        }

        $result = [
            $this->collectionEnvelope => $models,
        ];

        if (empty($result['items'])) {
            return ['code' => 20001, 'message' => Yii::t('error', '20001')];
        }

        if ($pagination !== false) {
            return ['code' => 10000, 'message' => Yii::t('app', '10001'), 'data' => array_merge($result, $this->serializePagination($pagination))];
        }

        return ['code' => 10000, 'message' => Yii::t('app', '10001'), 'data' => $result];
    }
}

65、编辑 /api/config/base.php，配置接口应用的 i18n 应用组件 ，如图65

        'i18n' => [
            'translations' => [
                'model/*'=> [
                    'class' => 'yii/i18n/PhpMessageSource',
                    'forceTranslation' => true,
                    'basePath'=>'@common/messages',
                    'fileMap'=>[
                    ],
                ],
                'app'=> [
                    'class' => 'yii/i18n/PhpMessageSource',
                    'forceTranslation' => true,
                    'basePath'=>'@api/messages',
                    'fileMap'=>[
                    ],
                ],
                '*'=> [
                    'class' => 'yii/i18n/PhpMessageSource',
                    'forceTranslation' => true,
                    'basePath'=>'@api/messages',
                    'fileMap'=>[
                    ],
                ],
            ],
        ],

66、新建语言包文件：/api/messages/zh/error.php(简体中文、响应失败)，如图66

return [
    20000 => 'error',
    20001 => '页面列表为空',
];

67、新建语言包文件：/api/messages/en/app.php(英语美国、响应成功)，如图67

return [
    10000 => 'success',
    10001 => 'Get page list is successful',
];

68、新建语言包文件：/api/messages/en/error.php(英语美国、响应失败)，如图68

return [
    20000 => 'error',
    20001 => 'Page list is empty',
];

69、打开网址：http://backend.cmcp-api.localhost/page/update?id=1 ，编辑文章，活跃复选框取消选中，如图69

70、在 Postman 中，GET http://www.cmcp-api.localhost/v1/pages ，200响应，状态为活跃的页面列表为空，如图70
注：
Accept application/json; version=0.0

{
    "code": 20001,
    "message": "Page list is empty"
}

71、在 Postman 中，GET http://www.cmcp-api.localhost/v1/pages ，200响应，状态为活跃的页面列表为空，如图71
注：
Accept application/json; version=0.0
Accept-Language zh-CN

{
    "code": 20001,
    "message": "页面列表为空"
}

72、打开网址：http://backend.cmcp-api.localhost/page/update?id=1 ，编辑文章，活跃复选框勾选，如图72

73、在 Postman 中，GET http://www.cmcp-api.localhost/v1/pages ，200响应，状态为活跃的页面列表不为空，如图73
注：
Accept application/json; version=0.0
Accept-Language en-US

{
    "code": 10000,
    "message": "Get page list is successful",
    "data": {
        "items": [
            {
                "id": 1,
                "slug": "about",
                "title": "About",
                "body": "

Lorem ipsum dolor sit amet, consectetur adipiscing elit.

",
                "view": "",
                "status": 1,
                "created_at": 1514860785,
                "updated_at": 1515482758
            }
        ],
        "_links": {
            "self": {
                "href": "http://www.cmcp-api.localhost/v1/pages?page=1"
            }
        },
        "_meta": {
            "totalCount": 1,
            "pageCount": 1,
            "currentPage": 1,
            "perPage": 20
        }
    }
}

74、在 Postman 中，GET http://www.cmcp-api.localhost/v1/pages ，200响应，状态为活跃的页面列表不为空，如图74
注：
Accept application/json; version=0.0
Accept-Language zh-CN

{
    "code": 10000,
    "message": "获取页面列表成功",
    "data": {
        "items": [
            {
                "id": 1,
                "slug": "about",
                "title": "About",
                "body": "

Lorem ipsum dolor sit amet, consectetur adipiscing elit.

",
                "view": "",
                "status": 1,
                "created_at": 1514860785,
                "updated_at": 1515482758
            }
        ],
        "_links": {
            "self": {
                "href": "http://www.cmcp-api.localhost/v1/pages?page=1"
            }
        },
        "_meta": {
            "totalCount": 1,
            "pageCount": 1,
            "currentPage": 1,
            "perPage": 20
        }
    }
}

75、GET /pages/1: 返回页面 1 的详细信息，编辑 /api/rests/page/Action.php，调整命名空间、继承关系、响应结构等，如图75

<?php
/**
 * @link http://www.yiiframework.com/
 * @copyright Copyright (c) 2008 Yii Software LLC
 * @license http://www.yiiframework.com/license/
 */

namespace api/rests/page;

use Yii;
use yii/db/ActiveRecordInterface;
use yii/web/NotFoundHttpException;

/**
 * Action is the base class for action classes that implement RESTful API.
 *
 * For more details and usage information on Action, see the [guide article on rest controllers](guide:rest-controllers).
 *
 * @author Qiang Wang <shuijingwanwq@163.com>
 * @since 1.0
 */
class Action extends /yii/rest/Action
{
    /**
     * Returns the data model based on the primary key given.
     * If the data model is not found, a 404 HTTP exception will be raised.
     * @param string $id the ID of the model to be loaded. If the model has a composite primary key,
     * the ID must be a string of the primary key values separated by commas.
     * The order of the primary key values should follow that returned by the `primaryKey()` method
     * of the model.
     * @return ActiveRecordInterface the model found
     * @throws NotFoundHttpException if the model cannot be found
     */
    public function findModel($id)
    {
        if ($this->findModel !== null) {
            return call_user_func($this->findModel, $id, $this);
        }

        /* @var $modelClass ActiveRecordInterface */
        $modelClass = $this->modelClass;
        $keys = $modelClass::primaryKey();
        if (count($keys) > 1) {
            $values = explode(',', $id);
            if (count($keys) === count($values)) {
                $model = $modelClass::findOne(array_combine($keys, $values));
            }
        } elseif ($id !== null) {
            $model = $modelClass::findOne($id);
        }

        if (isset($model)) {
            return $model;
        }

        throw new NotFoundHttpException(Yii::t('error', Yii::t('error', Yii::t('error', '20002'), ['id' => $id])), 20002);
    }
}

76、编辑 /api/rests/page/ViewAction.php，调整命名空间、继承关系、响应结构等，如图76

<?php
/**
 * @link http://www.yiiframework.com/
 * @copyright Copyright (c) 2008 Yii Software LLC
 * @license http://www.yiiframework.com/license/
 */

namespace api/rests/page;

use Yii;

/**
 * ViewAction implements the API endpoint for returning the detailed information about a model.
 *
 * For more details and usage information on ViewAction, see the [guide article on rest controllers](guide:rest-controllers).
 *
 * @author Qiang Wang <shuijingwanwq@163.com>
 * @since 1.0
 */
class ViewAction extends Action
{
    const STATUS_INACTIVE = 0; //状态：不活跃
    const STATUS_ACTIVE = 1; //状态：活跃

    /**
     * Displays a model.
     * @param string $id the primary key of the model.
     * @return /yii/db/ActiveRecordInterface the model being displayed
     */
    public function run($id)
    {
        $model = $this->findModel($id);
        if ($this->checkAccess) {
            call_user_func($this->checkAccess, $this->id, $model);
        }

        /* 判断状态，如果为不活跃，则返回失败 */
        if ($model->status === self::STATUS_INACTIVE) {
            return ['code' => 20003, 'message' => Yii::t('error', Yii::t('error', Yii::t('error', '20003'), ['id' => $id]))];
        }

        return ['code' => 10000, 'message' => Yii::t('app', '10002'), 'data' => $model];
    }
}

77、编辑语言包文件：/api/messages/zh/app.php(简体中文、响应成功)、/api/messages/zh/error.php(简体中文、响应失败)、/api/messages/en/app.php(英语美国、响应成功)、/api/messages/en/error.php(英语美国、响应失败)，如图77
/api/messages/zh/app.php

return [
    10000 => 'success',
    10001 => '获取页面列表成功',
    10002 => '获取页面详情成功',
];

/api/messages/zh/error.php

return [
    20000 => 'error',
    20001 => '页面列表为空',
    20002 => '页面ID：{id}，不存在',
    20003 => '页面ID：{id}，的状态不活跃',
];

/api/messages/en/app.php

return [
    10000 => 'success',
    10001 => 'Get page list is successful',
    10002 => 'Get page details succeeded',
];

/api/messages/en/error.php

return [
    20000 => 'error',
    20001 => 'Page list is empty',
    20002 => 'Page ID: {id}, does not exist',
    20003 => 'Page ID: {id}, the status is not active',
];

78、在 Postman 中，GET http://www.cmcp-api.localhost/v1/pages/1 ，200响应，其状态为活跃，如图78
注：
Accept application/json; version=0.0
Accept-Language zh-CN

{
    "code": 10000,
    "message": "获取页面详情成功",
    "data": {
        "id": 2,
        "slug": "contact",
        "title": "Contact",
        "body": "

Contact

",
        "view": "",
        "status": 1,
        "created_at": 1515488912,
        "updated_at": 1515488912
    }
}

79、在 Postman 中，GET http://www.cmcp-api.localhost/v1/pages/1 ，200响应，其状态为活跃，如图79
注：
Accept application/json; version=0.0
Accept-Language en-US

{
    "code": 10000,
    "message": "Get page details succeeded",
    "data": {
        "id": 2,
        "slug": "contact",
        "title": "Contact",
        "body": "

Contact

",
        "view": "",
        "status": 1,
        "created_at": 1515488912,
        "updated_at": 1515488912
    }
}

80、在 Postman 中，GET http://www.cmcp-api.localhost/v1/pages/2 ，200响应，其状态为不活跃，如图80
注：
Accept application/json; version=0.0
Accept-Language en-US

{
    "code": 20003,
    "message": "Page ID: 2, the status is not active"
}

81、在 Postman 中，GET http://www.cmcp-api.localhost/v1/pages/3 ，404响应，页面不存在，如图81
注：
Accept application/json; version=0.0
Accept-Language zh-CN

{
    "name": "Not Found",
    "message": "页面ID：3，不存在",
    "code": 20002,
    "status": 404,
    "type": "yii//web//NotFoundHttpException"
}

82、实现[[yii/web/Linkable]] 接口来支持HATEOAS，返回与本资源对象的相关链接，编辑资源类 /api/models/Page.php，如图82

<?php namespace api/models; use yii/helpers/Url; use yii/web/Linkable; use yii/web/Link; class Page extends /common/logics/Page implements Linkable { /** * Returns a list of links. * * @return array the links */ public function getLinks() { return [ Link::REL_SELF => Url::to(['page/view', 'id' => $this->id], true),
            'index' => Url::to(['page/index'], true),
            'view' => Url::to(['page/view', 'id' => $this->id], true),
            'create' => Url::to(['page/index'], true),
            'update' => Url::to(['page/view', 'id' => $this->id], true),
            'delete' => Url::to(['page/view', 'id' => $this->id], true),
            'options' => Url::to(['page/index'], true),

        ];
    }
}

83、在 Postman 中，GET http://www.cmcp-api.localhost/v1/pages/1 ，200响应，支持HATEOAS，如图83

注：
Accept application/json; version=0.0
Accept-Language zh-CN
Accept-Encoding gzip, deflate, br

{
    "code": 10000,
    "message": "获取页面详情成功",
    "data": {
        "id": 1,
        "slug": "about",
        "title": "About",
        "body": "

Lorem ipsum dolor sit amet, consectetur adipiscing elit.

",
        "view": "",
        "status": 1,
        "created_at": 1514860785,
        "updated_at": 1515548927,
        "_links": {
            "self": {
                "href": "http://www.cmcp-api.localhost/v1/pages/1"
            },
            "index": {
                "href": "http://www.cmcp-api.localhost/v1/pages"
            },
            "view": {
                "href": "http://www.cmcp-api.localhost/v1/pages/1"
            },
            "create": {
                "href": "http://www.cmcp-api.localhost/v1/pages"
            },
            "update": {
                "href": "http://www.cmcp-api.localhost/v1/pages/1"
            },
            "delete": {
                "href": "http://www.cmcp-api.localhost/v1/pages/1"
            },
            "options": {
                "href": "http://www.cmcp-api.localhost/v1/pages"
            }
        }
    }
}

84、POST /pages: 创建一个新页面，编辑 /api/rests/page/CreateAction.php，如图84

<?php
/**
 * @link http://www.yiiframework.com/
 * @copyright Copyright (c) 2008 Yii Software LLC
 * @license http://www.yiiframework.com/license/
 */

namespace api/rests/page;

use Yii;
use yii/base/Model;
use yii/helpers/Url;
use yii/web/ServerErrorHttpException;

/**
 * CreateAction implements the API endpoint for creating a new model from the given data.
 *
 * For more details and usage information on CreateAction, see the [guide article on rest controllers](guide:rest-controllers).
 *
 * @author Qiang Wang <shuijingwanwq@163.com>
 * @since 1.0
 */
class CreateAction extends Action
{
    /**
     * @var string the scenario to be assigned to the new model before it is validated and saved.
     */
    public $scenario = Model::SCENARIO_DEFAULT;
    /**
     * @var string the name of the view action. This property is need to create the URL when the model is successfully created.
     */
    public $viewAction = 'view';


    /**
     * Creates a new model.
     * @return /yii/db/ActiveRecordInterface the model newly created
     * @throws ServerErrorHttpException if there is any error when creating the model
     */
    public function run()
    {
        if ($this->checkAccess) {
            call_user_func($this->checkAccess, $this->id);
        }

        /* @var $model /yii/db/ActiveRecord */
        $model = new $this->modelClass([
            'scenario' => $this->scenario,
        ]);

        $model->load(Yii::$app->getRequest()->getBodyParams(), '');
        if ($model->save()) {
            $response = Yii::$app->getResponse();
            $response->setStatusCode(201);
            $id = implode(',', array_values($model->getPrimaryKey(true)));
            $response->getHeaders()->set('Location', Url::toRoute([$this->viewAction, 'id' => $id], true));
        } elseif ($model->hasErrors()) {
            $response = Yii::$app->getResponse();
            $response->setStatusCode(422, 'Data Validation Failed.');
            foreach ($model->getFirstErrors() as $message) {
                $firstErrors = $message;
            }
            return ['code' => 20004, 'message' => Yii::t('error', Yii::t('error', Yii::t('error', '20004'), ['firstErrors' => $firstErrors]))];
        } elseif (!$model->hasErrors()) {
            throw new ServerErrorHttpException('Failed to create the object for unknown reason.');
        }

        return ['code' => 10000, 'message' => Yii::t('app', '10003'), 'data' => $model];
    }
}

85、在 Postman 中，POST http://www.cmcp-api.localhost/v1/pages ，201响应，如图85
注：
Accept application/json; version=0.0
Accept-Language zh-CN
Accept-Encoding gzip, deflate, br
Content-Type application/x-www-form-urlencoded

{
    "code": 10000,
    "message": "创建页面成功",
    "data": {
        "slug": "slug-20180110-4",
        "title": "title-20180110-4",
        "body": "body-20180110-4",
        "view": "view-20180110-4",
        "status": "0",
        "created_at": 1515566824,
        "updated_at": 1515566824,
        "id": 7,
        "_links": {
            "self": {
                "href": "http://www.cmcp-api.localhost/v1/pages/7"
            },
            "index": {
                "href": "http://www.cmcp-api.localhost/v1/pages"
            },
            "view": {
                "href": "http://www.cmcp-api.localhost/v1/pages/7"
            },
            "create": {
                "href": "http://www.cmcp-api.localhost/v1/pages"
            },
            "update": {
                "href": "http://www.cmcp-api.localhost/v1/pages/7"
            },
            "delete": {
                "href": "http://www.cmcp-api.localhost/v1/pages/7"
            },
            "options": {
                "href": "http://www.cmcp-api.localhost/v1/pages"
            }
        }
    }
}

86、在 Postman 中，POST http://www.cmcp-api.localhost/v1/pages ，参数保持原样，422响应，如图86
注：
Accept application/json; version=0.0
Accept-Language zh-CN
Accept-Encoding gzip, deflate, br
Content-Type application/x-www-form-urlencoded

{
    "code": 20004,
    "message": "数据验证失败：Slug的值/"slug-20180110-4/"已经被占用了。"
}

87、在 Postman 中，POST http://www.cmcp-api.localhost/v1/pages ，422响应(数据验证失败 (例如，响应一个 POST 请求)。 请检查响应体内详细的错误消息。)，如图87
注：
Accept application/json; version=0.0
Accept-Language zh-CN
Accept-Encoding gzip, deflate, br
Content-Type application/x-www-form-urlencoded

Body
缺少 title 参数

{
    "code": 20004,
    "message": "数据验证失败：Title不能为空。"
}

88、在 Postman 中，POST http://www.cmcp-api.localhost/v1/pages ，422响应，如图88
注：
Accept application/json; version=0.0
Accept-Language en-US
Accept-Encoding gzip, deflate, br
Content-Type application/x-www-form-urlencoded

Body
缺少 title 参数

{
    "code": 20004,
    "message": "Data validation failed: Title cannot be blank."
}

89、PUT /pages/4: 更新一个页面，编辑 /api/rests/page/UpdateAction.php，如图89

<?php
/**
 * @link http://www.yiiframework.com/
 * @copyright Copyright (c) 2008 Yii Software LLC
 * @license http://www.yiiframework.com/license/
 */

namespace api/rests/page;

use Yii;
use yii/base/Model;
use yii/db/ActiveRecord;
use yii/web/ServerErrorHttpException;

/**
 * UpdateAction implements the API endpoint for updating a model.
 *
 * For more details and usage information on UpdateAction, see the [guide article on rest controllers](guide:rest-controllers).
 *
 * @author Qiang Wang <shuijingwanwq@163.com>
 * @since 1.0
 */
class UpdateAction extends Action
{
    /**
     * @var string the scenario to be assigned to the model before it is validated and updated.
     */
    public $scenario = Model::SCENARIO_DEFAULT;


    /**
     * Updates an existing model.
     * @param string $id the primary key of the model.
     * @return /yii/db/ActiveRecordInterface the model being updated
     * @throws ServerErrorHttpException if there is any error when updating the model
     */
    public function run($id)
    {
        /* @var $model ActiveRecord */
        $model = $this->findModel($id);

        if ($this->checkAccess) {
            call_user_func($this->checkAccess, $this->id, $model);
        }

        $model->scenario = $this->scenario;
        $model->load(Yii::$app->getRequest()->getBodyParams(), '');
        if ($model->save() === false) {
            if ($model->hasErrors()) {
                $response = Yii::$app->getResponse();
                $response->setStatusCode(422, 'Data Validation Failed.');
                foreach ($model->getFirstErrors() as $message) {
                    $firstErrors = $message;
                }
                return ['code' => 20004, 'message' => Yii::t('error', Yii::t('error', Yii::t('error', '20004'), ['firstErrors' => $firstErrors]))];
            } elseif (!$model->hasErrors()) {
                throw new ServerErrorHttpException('Failed to update the object for unknown reason.');
            }
        }

        return ['code' => 10000, 'message' => Yii::t('app', '10004'), 'data' => $model];
    }
}

90、在 Postman 中，PUT http://www.cmcp-api.localhost/v1/pages/4 ，200响应，如图90

{
    "code": 10000,
    "message": "更新页面成功",
    "data": {
        "id": 4,
        "slug": "slug-20180110-44",
        "title": "title-20180110-44",
        "body": "body-20180110-44",
        "view": "view-20180110-44",
        "status": "1",
        "created_at": 1515554512,
        "updated_at": 1515569633,
        "_links": {
            "self": {
                "href": "http://www.cmcp-api.localhost/v1/pages/4"
            },
            "index": {
                "href": "http://www.cmcp-api.localhost/v1/pages"
            },
            "view": {
                "href": "http://www.cmcp-api.localhost/v1/pages/4"
            },
            "create": {
                "href": "http://www.cmcp-api.localhost/v1/pages"
            },
            "update": {
                "href": "http://www.cmcp-api.localhost/v1/pages/4"
            },
            "delete": {
                "href": "http://www.cmcp-api.localhost/v1/pages/4"
            },
            "options": {
                "href": "http://www.cmcp-api.localhost/v1/pages"
            }
        }
    }
}

91、在 Postman 中，PUT http://www.cmcp-api.localhost/v1/pages/4 ，422响应，如图91
注：
Accept application/json; version=0.0
Accept-Language en-US
Accept-Encoding gzip, deflate, br
Content-Type application/x-www-form-urlencoded

Body
slug 的值已经被另一页面占用

{
    "code": 20004,
    "message": "Data validation failed: Slug /"slug-20180110-5/" has already been taken."
}

92、DELETE /pages/4: 删除页面4，编辑 /api/rests/page/DeleteAction.php，如图92

<?php
/**
 * @link http://www.yiiframework.com/
 * @copyright Copyright (c) 2008 Yii Software LLC
 * @license http://www.yiiframework.com/license/
 */

namespace api/rests/page;

use Yii;
use yii/web/ServerErrorHttpException;

/**
 * DeleteAction implements the API endpoint for deleting a model.
 *
 * For more details and usage information on DeleteAction, see the [guide article on rest controllers](guide:rest-controllers).
 *
 * @author Qiang Wang <shuijingwanwq@163.com>
 * @since 1.0
 */
class DeleteAction extends Action
{
    /**
     * Deletes a model.
     * @param mixed $id id of the model to be deleted.
     * @throws ServerErrorHttpException on failure.
     */
    public function run($id)
    {
        $model = $this->findModel($id);

        if ($this->checkAccess) {
            call_user_func($this->checkAccess, $this->id, $model);
        }

        if ($model->delete() === false) {
            throw new ServerErrorHttpException('Failed to delete the object for unknown reason.');
        }

        return ['code' => 10000, 'message' => Yii::t('app', '10005')];
    }
}

93、在 Postman 中，DELETE http://www.cmcp-api.localhost/v1/pages/7 ，200响应，如图93
注：
Accept application/json; version=0.0
Accept-Language zh-CN
Accept-Encoding gzip, deflate, br

{
    "code": 10000,
    "message": "删除页面成功"
}

94、展示一下语言包文件的最后内容，如图94
/api/messages/zh/app.php

return [
    10000 => 'success',
    10001 => '获取页面列表成功',
    10002 => '获取页面详情成功',
    10003 => '创建页面成功',
    10004 => '更新页面成功',
    10005 => '删除页面成功',
];

/api/messages/zh/error.php

return [
    20000 => 'error',
    20001 => '页面列表为空',
    20002 => '页面ID：{id}，不存在',
    20003 => '页面ID：{id}，的状态不活跃',
    20004 => '数据验证失败：{firstErrors}',
];

/api/messages/en/app.php

return [
    10000 => 'success',
    10001 => 'Get page list is successful',
    10002 => 'Get page details succeeded',
    10003 => 'Create a page success',
    10004 => 'Update page success',
    10005 => 'Delete page success',
];

/api/messages/en/error.php

return [
    20000 => 'error',
    20001 => 'Page list is empty',
    20002 => 'Page ID: {id}, does not exist',
    20003 => 'Page ID: {id}, the status is not active',
    20004 => 'Data validation failed: {firstErrors}',
];

95、OPTIONS /pages: 显示关于末端 /pages 支持的动词，在 Postman 中，OPTIONS http://www.cmcp-api.localhost/v1/pages ，200响应，如图95

96、OPTIONS /pages/1: 显示关于末端 /pages/1 支持的动词，在 Postman 中，OPTIONS http://www.cmcp-api.localhost/v1/pages/1 ，200响应，如图96

97、总结：现在支持的行为：index、view、create、update、delete、options，除 options 之外，基本上是继承之后，再次覆写实现具体的需求了的。