https://github.com/launchcodedev/api-fields-middleware

API Fields, as composable koa middleware
https://github.com/launchcodedev/api-fields-middleware

Last synced: 11 months ago
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API Fields, as composable koa middleware

• Host: GitHub
• URL: https://github.com/launchcodedev/api-fields-middleware
• Owner: launchcodedev
• License: mpl-2.0
• Created: 2020-06-12T15:49:02.000Z (over 5 years ago)
• Default Branch: master
• Last Pushed: 2023-01-24T02:54:04.000Z (about 3 years ago)
• Last Synced: 2025-01-07T17:42:56.145Z (about 1 year ago)
• Language: TypeScript
• Size: 1.28 MB
• Stars: 2
• Watchers: 3
• Forks: 1
• Open Issues: 11
• Metadata Files:
  • Readme: README.md
  • Contributing: CONTRIBUTING.md
  • License: LICENSE

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README

          
# API Fields Middlware

[![Licensed under MPL 2.0](https://img.shields.io/badge/license-MPL_2.0-green.svg)](https://www.mozilla.org/en-US/MPL/2.0/)

[![Build Status](https://github.com/launchcodedev/api-fields-middleware/workflows/CI/badge.svg)](https://github.com/launchcodedev/api-fields-middleware/actions)

[![npm](https://img.shields.io/npm/v/@lcdev/api-fields-middleware.svg)](https://www.npmjs.com/package/@lcdev/api-fields-middleware)

Use API Fields easily in Koa.

```bash

yarn add @lcdev/api-fields-middleware@0.1

```

```typescript

import { ApiField } from '@lcdev/api-fields';

// somewhere, where your model is defined

class EntityA {

  @ApiField()

  publicFieldA: any;

  @ApiField()

  publicFieldB: any;

  privateFieldA: any;

  privateFieldB: any;

}

import { extractApiFieldsMiddleware } from '@lcdev/api-fields-middleware';

// somewhere, where you have a koa router

app

  .get('/foo/bar', extractApiFieldsMiddleware(EntityA), async (ctx, next) => {

    // the body ends up as an object that is, or looks like an 'EntityA'

    ctx.body = new EntityA();

    return next();

  });

```

This will perform the `extract` with `ApiFields` of `EntityA`, after your router

middleware has run. This will only apply **if the response is a 200**.

Features:

- Supports `extractApiFieldsMiddleware([EntityA])` to imply that the api response is an array of EntityA

- Supports `extractApiFieldsMiddleware({ ... }, true)` to pass a "raw" `Extraction` object to use (you might use `getApiFields` with an extension here)