Converts GraphQL Schema Language to JSON Schema
npm install graphql-json-schema const transform = require('graphql-json-schema'); const schema = transform(` scalar Foo union MyUnion = Foo | String | Float enum MyEnum { FIRST_ITEM SECOND_ITEM THIRD_ITEM } type Stuff { my_field: Int req_field: String! recursion: MoreStuff custom_scalar: Foo enum: MyEnum } type MoreStuff { first: [Float] identifier: [ID]! reference: Stuff! bool: Boolean! union: MyUnion with_params(param1: Int, param2: [Float]): Int } input InputType { an_int: Int! a_string: String } `); console.log(schema);the code above prints the following JSON as a plain JS object:
{ "$schema": "http://json-schema.org/draft-04/schema#", "definitions": { "Foo": { "title": "Foo", "type": "GRAPHQL_SCALAR" }, "MyUnion": { "title": "MyUnion", "type": "GRAPHQL_UNION", "oneOf": [ { "$ref": "#/definitions/Foo" }, { "type": "string", "required": false }, { "type": "number", "required": false } ] }, "MyEnum": { "title": "MyEnum", "type": "GRAPHQL_ENUM", "enum": [ "FIRST_ITEM", "SECOND_ITEM", "THIRD_ITEM" ] }, "Stuff": { "title": "Stuff", "type": "object", "properties": { "my_field": { "type": "integer", "required": false, "title": "my_field", "arguments": [] }, "req_field": { "type": "string", "required": true, "title": "req_field", "arguments": [] }, "recursion": { "allOf": [ { "$ref": "#/definitions/MoreStuff" }, { "title": "recursion" } ] }, "custom_scalar": { "allOf": [ { "$ref": "#/definitions/Foo" }, { "title": "custom_scalar" } ] }, "enum": { "allOf": [ { "$ref": "#/definitions/MyEnum" }, { "title": "enum" } ] } }, "required": [ "req_field" ] }, "MoreStuff": { "title": "MoreStuff", "type": "object", "properties": { "first": { "type": "array", "items": { "type": { "type": "number", "required": false } }, "title": "first", "arguments": [] }, "identifier": { "type": "array", "items": { "type": { "type": "string", "required": false } }, "required": true, "title": "identifier", "arguments": [] }, "reference": { "allOf": [ { "$ref": "#/definitions/Stuff", "required": true }, { "title": "reference" } ] }, "bool": { "type": "boolean", "required": true, "title": "bool", "arguments": [] }, "union": { "allOf": [ { "$ref": "#/definitions/MyUnion" }, { "title": "union" } ] }, "with_params": { "type": "integer", "required": false, "title": "with_params", "arguments": [ { "title": "param1", "type": { "type": "integer", "required": false }, "defaultValue": null }, { "title": "param2", "type": { "type": "array", "items": { "type": { "type": "number", "required": false } } }, "defaultValue": null } ] } }, "required": [ "identifier", "bool" ] }, "InputType": { "title": "InputType", "type": "object", "input": true, "properties": { "an_int": { "type": "integer", "required": true, "title": "an_int" }, "a_string": { "type": "string", "required": false, "title": "a_string" } }, "required": [ "an_int" ] } } }