waterline-to-graphql

##Stability status: alpha Waterline to graphql adapter. This library converts waterline models to graphql types. You can execute graphql query which in turns resolves into waterline queries behind the scenes.

##Basic Usage: (See waterline-example in examples folder)

import { getGraphQLSchemaFrom } from 'waterline-to-graphql';
.....

• Pass in intialized models aka waterline collections.
• If you are using standalone waterline models need to be patched with associations array. See here . See waterline-example in examples folder
• If you are passing in sails.models, you dont need the above patch

let schema = getGraphQLSchemaFrom(models);

• Execute graphql query

var query = '{ users{firstName,lastName posts{text,comments{text}}} }';
    graphql(schema, query).then(result => {
      console.log(JSON.stringify(result, null, 2));
    });

• Example transformation Waterline

module.exports = {
  identity: 'user',
  attributes: {
    firstName: {
      type: 'string',
      required: true
    },
    lastName: {
      type: 'string',
      required: true
    },
    email: {
      type: 'email',
      required: true
    },
    phone: 'string',
    posts: {
      collection: 'post',
      via: 'from'
    },
    comments: {
      collection: 'comment',
      via: 'from'
    }
  }
};

GraphQL

// User
let UserType = new GraphQLObjectType({
  name: 'user',
  fields: () => ({
    firstName: {
      type: GraphQLString
    },
    lastName: {
      type: GraphQLString
    },
    email: {
      type: GraphQLString
    },
    phone: GraphQLString,
    posts: {
      type: new GraphQLList(PostType)
    },
    comments: {
      type: new GraphQLList(CommentType)
    }
  }),
  interfaces:[Node]
});

##Using with sails,express,relay: If you are using with express/sails , you can define graphql middleware as below.

• npm i waterline-to-graphql
• Add the following in config/http.js.

    graphql: function(req, res, next) {
      console.log('executing graphql query');
      if (req.url === '/graphql') {
        var schema = getGraphQLSchemaFrom(sails.models);
        require('express-graphql')({
            schema: schema,
            pretty: true
          })(req, res);
      } else {
        return next();
      }
    }

Search、Sort、limit、skip feture

You can search、sort、limit or skip of the model by query arguments like this:

query someQuery {
  users(where: { role: 'admin' }, sort: 'createdAt', skip: 10, limit: 10) {
    account,
    addresses(where: { country: 'China' }) {
      country
    }
  }
}

####See (react-relay-graphql-sails-example)

##TODO Add mutations Add frontend code for react-relay-graphql-sails-example