strapi-plugin-transformer

A plugin for Strapi that provides the ability to transform the API request and/or response.

Requirements

The installation requirements are the same as Strapi itself and can be found in the documentation on the Quick Start page in the Prerequisites info card.

Support

IMPORTANT: GraphQL is not supported, see #23 and #13 for additional context.

Strapi versions

• v4.x.x

NOTE: While this plugin may work with the older Strapi versions, they are not supported, it is always recommended to use the latest version of Strapi.

Installation

npm install strapi-plugin-transformer

# OR

yarn add strapi-plugin-transformer

Configuration

The plugin configuration is stored in a config file located at ./config/plugins.js. If this file doesn't exist, you will need to create it.

Minimal Configuration

module.exports = ({ env }) => ({
  // ..
 'transformer': {
    enabled: true,
    config: {}
  },
  // ..
});

Sample configuration

module.exports = ({ env }) => ({
  // ..
 'transformer': {
    enabled: true,
    config: {
      responseTransforms: {
        removeAttributesKey: true,
        removeDataKey: true,
      },
      requestTransforms : {
        wrapBodyWithDataKey: true
      },
      hooks: {
        preResponseTransform : (ctx) => console.log('hello from the preResponseTransform hook!'),
        postResponseTransform : (ctx) => console.log('hello from the postResponseTransform hook!')
      },
      contentTypeFilter: {
        mode: 'allow',
        uids: {
          'api::article.article': true,
          'api::category.category': {
            'GET':true,
          }
        }
      },
      plugins: {
        ids: {
          'slugify': true,
        }
      }
    }
  },
  // ..
});

IMPORTANT NOTE: Make sure any sensitive data is stored in env files.

The Complete Plugin Configuration Object

| Property | Description | Type | Default | Required | | -------- | ----------- | ---- | ------- | -------- | | responseTransforms | The transformations to enable for the API response | Object | N/A | No | | responseTransforms.removeAttributesKey | Removes the attributes key from the response | Boolean | false | No | | responseTransforms.removeDataKey | Removes the data key from the response | Boolean | false | No | | requestTransforms | The transformations to enable for an API request | Object | N/A | No | | requestTransforms.wrapBodyWithDataKey | Auto wraps the body of PUT and POST requests with a data key | Boolean | false | No | | hooks | The hooks to enable for the plugin | Object | N/A | No | | hooks.preResponseTransform | A hook that executes before the Response Transforms are applied | Function | () => {} | No | | hooks.postResponseTransform | A hook that executes after the Response Transforms are applied | Function | () => {} | No | | contentTypeFilter | The content types to deny or allow the middleware to be registered on. Defaults to allow all content types | Object | N/A | No | | contentTypeFilter.mode | The filter mode. The current supported modes are none, allow or deny | String | 'none' | No | | contentTypeFilter.uids | The uids to filter | Object | {} | No | | plugins | The plugins to deny or allow the middleware to be registered on. Defaults to deny all plugins | Object | N/A | No | | plugins.mode | The filter mode. The current supported modes are none, allow or deny | String | 'none' | No | | plugins.ids | The plugin ids to filter. The plugin id is the name you set in the plugins.js file | Object | {} | No |

Usage

Once the plugin has been installed, configured and enabled any request to the Strapi API will be auto transformed.

Current Supported Transformations

Remove the attributes key

This response transform will remove the attributes key from the response and shift all of its properties up one level.

Before

{
  "data": {
    "id": 1,
    "attributes": {
      "title": "Lorem Ipsum",
      "createdAt": "2022-02-11T01:51:49.902Z",
      "updatedAt": "2022-02-11T01:51:52.797Z",
      "publishedAt": "2022-02-11T01:51:52.794Z",
      "ipsum": {
        "data": {
          "id": 2,
          "attributes": {
            "title": "Dolor sat",
            "createdAt": "2022-02-15T03:45:32.669Z",
            "updatedAt": "2022-02-17T00:30:02.573Z",
            "publishedAt": "2022-02-17T00:07:49.491Z",
          },
        },
      },
    },
  },
  "meta": {},
}

After

{
  "data": {
    "id": 1,
    "title": "Lorem Ipsum",
    "createdAt": "2022-02-11T01:51:49.902Z",
    "updatedAt": "2022-02-11T01:51:52.797Z",
    "publishedAt": "2022-02-11T01:51:52.794Z",
    "ipsum": {
      "data": {
        "id": 2,
        "title": "Dolor sat",
        "createdAt": "2022-02-15T03:45:32.669Z",
        "updatedAt": "2022-02-17T00:30:02.573Z",
        "publishedAt": "2022-02-17T00:07:49.491Z",
      },
    },
  },
  "meta": {},
}

Remove the data key

This response transform will remove the data key from the response and shift the attribute data to be top level.

Before

{
  "data": {
    "id": 1,
    "attributes": {
      "title": "Lorem Ipsum",
      "createdAt": "2022-02-11T01:51:49.902Z",
      "updatedAt": "2022-02-11T01:51:52.797Z",
      "publishedAt": "2022-02-11T01:51:52.794Z",
      "ipsum": {
        "data": {
          "id":2,
          "attributes": {
            "title": "Dolor sat",
            "createdAt": "2022-02-15T03:45:32.669Z",
            "updatedAt": "2022-02-17T00:30:02.573Z",
            "publishedAt": "2022-02-17T00:07:49.491Z",
          },
        },
      },
    },
  },
  "meta": {},
}

After

{
  "data": {
    "id": 1,
    "attributes": {
      "title": "Lorem Ipsum",
      "createdAt": "2022-02-11T01:51:49.902Z",
      "updatedAt": "2022-02-11T01:51:52.797Z",
      "publishedAt": "2022-02-11T01:51:52.794Z",
      "ipsum": {
        "id":2,
        "attributes": {
          "title": "Dolor sat",
          "createdAt": "2022-02-15T03:45:32.669Z",
          "updatedAt": "2022-02-17T00:30:02.573Z",
          "publishedAt": "2022-02-17T00:07:49.491Z",
        },
      },
    },
  },
  "meta": {},
}

Auto wrap the body content with a data key

This request transform will auto wrap the body content with a surrounding data key on all enabled routes.

Before

{
  "title": "Lorem Ipsum",
}

After

{
  "data": {
    "title": "Lorem Ipsum",
  }
}

Supported Headers

| Name | Description | Type | Default | Required | | -------- | ----------- | ---- | ------- | -------- | | Strapi-Transformer-Ignore | Indicates if transform should be ignored for this request | String | 'false' | No |

CORS

By default, CORS will block any custom headers. To enable custom headers to be accepted the cors middlware headers property must include the custom header(s) that should be accepted.

Example CORS configuration

module.exports = [
  // ..
  {
    name: 'strapi::cors',
    config: {
      headers: ['Strapi-Transformer-Ignore'],
    },
  },
  // ..
]

Bugs

If any bugs are found please report them as a Github Issue