graphql-parse-fields

Parse fields from AST (GraphQLResolveInfo) into a JSON tree

Installation

npm i --save graphql-parse-fields

Usage

Example1: Parse GraphQL resolve info

@param {Object} info - graphql resolve info
@param {Boolean} [ignoreRoot] - default: true
@return {Object} fieldTree ```js var parseFields = require('graphql-parse-fields')

var GraphQLObjectType = //... var UserType = //...

var queryType = new GraphQLObjectType({ name: 'Query', fields: { user: { type: UserType, resolve: function (root, args, ctx, info) { var fields = parseFields(info) / Fields parsed from query (at bottom of this example): note: since keepRoot was not passed, parseFields ignores the root key "user" for convenience { id: true, name: true, widgets: { edges { node { id: true } } } } /

   var fieldsWithRoot = parseFields(info, true) // keepRoot: true
   /*
    Fields parsed from query (at bottom of this example):

    {
      user {
        id: true,
        name: true,
        widgets: {
          edges {
            node {
              id: true
            }
          }
        }
      }
    }
    */
  },
}

} })

/* Query:

query userQuery { user { id name widgets { edges { node { id } } } } } */


Example2: Parse GraphQL ASTs
 * @param {Array} asts - ast array
 * @param {Object} [fragments] - optional fragment map
 * @param {Object} [fieldTree] - optional initial field tree
 * @return {Object} fieldTree
```js
var ast = {
  "kind": "Field",
  "alias": null,
  "name": {
    "kind": "Name",
    "value": "user"
  },
  "selectionSet": {
    "kind": "SelectionSet",
    "selections": [
      {
        "kind": "Field",
        "name": {
          "kind": "Name",
          "value": "id"
        }
        selectionSet: null
        //...
      }
    ]
    //...
  }
  //...
}
parseAst(ast)
parseAst([ast])
/*
Both result in:
{
  user: {
    id: true
  }
}
*/

Changelog

CHANGELOG.md

License

MIT

包详细信息