json-schema-deref-sync

Dereference JSON pointers in a JSON schemas with their true resolved values. Basically a lighter, synchronous version of json-schema-deref but omits web references.

Installation

npm install json-schema-deref-sync

Overview

Let's say you have the following JSON Schema:

{
  "description": "Just some JSON schema.",
  "title": "Basic Widget",
  "type": "object",
  "definitions": {
    "id": {
      "description": "unique identifier",
      "type": "string",
      "minLength": 1,
      "readOnly": true
    }
  },
  "properties": {
    "id": {
      "$ref": "#/definitions/id"
    },
    "bar": {
      "$ref": "bar.json"
    }
  }
}

Sometimes you just want that schema to be fully expanded, with $ref's being their (true) resolved values:

{
  "description": "Just some JSON schema.",
  "title": "Basic Widget",
  "type": "object",
  "definitions": {
    "id": {
      "description": "unique identifier",
      "type": "string",
      "minLength": 1,
      "readOnly": true
    }
  },
  "properties": {
    "id": {
      "description": "unique identifier",
      "type": "string",
      "minLength": 1,
      "readOnly": true
    },
    "bar": {
      "description": "bar property",
      "type": "boolean"
    }
  }
}

This utility lets you do that:

var deref = require('json-schema-deref-sync');
var myschema = require('schema.json');
 
var fullSchema = deref(myschema);

API Reference

deref(schema, options) ⇒ Object | Error

Derefs $ref's in JSON Schema to actual resolved values. Supports local, and file refs.

Kind: global function
Returns: Object | Error - the deref schema oran instance of Error if error.

Param	Type	Description
schema	Object	The JSON schema
options	Object	options
options.baseFolder	String	the base folder to get relative path files from. Default is process.cwd()
options.failOnMissing	Boolean	By default missing / unresolved refs will be left as is with their ref value intact. If set to true we will error out on first missing ref that we cannot resolve. Default: false.
options.mergeAdditionalProperties	Boolean	By default properties in a object with $ref will be removed in the output. If set to true they will be added/overwrite the output. This will use lodash's merge function. Default: false.
options.removeIds	Boolean	By default $id fields will get copied when dereferencing. If set to true they will be removed. Merged properties will not get removed. Default: false.
options.loaders	Object	A hash mapping reference types (e.g., 'file') to loader functions.