Lucky is a serverless plugin that generates JSON Schema's from Yup Validators Schemas.
You can transform a Yup Validator into a JSON Schema:
Note: Available only in Yup Validators using require imports and module.exports.
Validator
const { object, string, number } = require('yup')
const userValidation = object().shape({ email: string(), age: number() })
module.exports = userValidation
JSON Schema
{
"type": "object",
"properties": {
"email": { "type": "string", "example": ""},
"age": { "type": "number", "example": 10 }
},
"example": {}
}
How it works
Lucky generates many JSON Schema's from a specific path with Yup Validators, you can set the path for validators and get the output JSON files, Lucky also updates your documentation, adding the new generated models, only if its needed.
It's strongly recommended that you use a documentation plugin for your serverless app and enable it to use Lucky, an awesome plugin is: serverless-openapi-documenter
Installation
Install via npm in the root of your serverless app:
npm install serverless-lucky --save-dev
You can also install via yarn:
yarn add serverless-lucky -D
Add the plugin to the plugins
section in your serverless serverless.yml
:
plugins:
- serverless-lucky
Configuration
Lucky configurations must be defined under custom.lucky
in the serverless.yml
file before they can be used in the functions' configs:
custom:
lucky:
validatorsBasePath: src/validations # Specify your validator's location.
outputPath: docs/models # Specify where you want to generate the output files.
useExamples: false # Default, set to true if JSON models should have an example property.
inlineDocs: false # Default, set to true if your documentation don't use an external Yaml.
Note: Paths are relative to the root app folder.
Then, in your function, specify the httpApi.lucky
get-hello-world:
handler: helloWorld/get.handler
events:
- httpApi:
method: get
path: /hello
lucky:
schema: hello/getValidator.js # Yup Validator File
contentType: application/json # Default
folders:
- hello
- hello/new
Note: Folder's array only uses unique values.
Generate JSON Schema's
To run, execute the command: sls lucky
, the following message will be showed, if successful:
Lucky on get-hello-world: schema created in .../docs/models/hello/get.json
Another message will be followed about the same file in another folder, according to array's folder:
Lucky on get-hello-world: schema created in .../docs/models/hello/new/get.json
Yaml documentation
Lucky updates your documentation Yaml file before the creation of new JSON schemas, adding a reference to new the schema with default name, schema location, description and contentType.
Before:
documentation:
version: '1'
title: 'My API'
description: 'This is my API'
termsOfService: https://google.com
externalDocumentation:
url: https://google.com
description: A link to google
servers:
url: https://example.com:{port}/
description: The server
variables:
port:
enum:
- 4000
- 3000
default: 3000
description: The port the server operates on
models: {}
After:
documentation:
version: '1'
title: 'My API'
description: 'This is my API'
termsOfService: https://google.com
externalDocumentation:
url: https://google.com
description: A link to google
servers:
url: https://example.com:{port}/
description: The server
variables:
port:
enum:
- 4000
- 3000
default: 3000
description: The port the server operates on
models:
- name: GetHelloWorld
description: ""
contentType: application/json
schema: ${file(docs/models/hello/get.json)}
Using folders property
One interesting concept in Lucky is that you also can use folders to create groups and organize the output schema files, specifying the same folder by different functions.
functions:
get-hello-world:
handler: helloWorld/get.handler
events:
- httpApi:
method: get # Output file name
path: /hello
lucky:
schema: hello/getValidator.js # Yup Validator File
folders:
- hello # Same folder or 'group' as create-hello-world
create-hello-world:
handler: helloWorld/post.handler
events:
- httpApi:
method: post # Output files names are the method of a function
path: /hello
lucky:
schema: hello/createValidator.js # Yup Validator File
folders:
- hello # Same folder or 'group' as get-hello-world
Note: It will create 2 files, post.json and get.json, located in
docs/models/hello
folder, according to outputPath.
License
MIT