backbone-parse.js

/********** PARSE SERVER ACCESS PARAMETERS **********/

var appId = "myApp";
var serverURL = "http://localhost:1337/parse";

/******************* END *************************/

{

  /*
    Modify each model's parse method to filter
    "createdAt" and "updatedAt" returned by parse
  */

  let ParseModel = {
      parse: function(resp, options) {
        delete resp.createdAt;
        delete resp.updatedAt;
        return resp;
      },

      idAttribute: "objectId"
  };
  _.extend(Backbone.Model.prototype, ParseModel);

  /*
    Replace the parse method of Backbone.Collection

    Backbone Collection expects to get a JSON array when fetching.
    Parse returns a JSON object with key "results" and value being the array.
  */

  let ParseCollection = {
    parse : function(resp, options) {
      let _parse_class_name = this.__proto__._parse_class_name;
      // if the collection is a parse collection and the response is coming from parse server
      if (_parse_class_name && resp.results) {
        // return array of results from the results property of the response
        return resp.results;
      } else {
      	//return original, in case there are collections from another source
        return resp;
      }
    }
  };
  _.extend(Backbone.Collection.prototype, ParseCollection);

  /*
    Method to HTTP Type Map
  */
	let methodMap = {
    'create': 'POST',
    'update': 'PUT',
    'delete': 'DELETE',
    'read':   'GET'
  };

  /*
    Override the default Backbone.sync
  */
  let ajaxSync = Backbone.sync;
	Backbone.sync = function(method, model, options) {

    let object_id = model.models? "" : model.id; //get id if it is not a Backbone Collection

    let class_name = model.__proto__._parse_class_name;
    if (!class_name) {
      return ajaxSync(method, model, options) //It's a not a Parse-backed model, use default sync
    }

    // create request parameters
		let type = methodMap[method];
	    options || (options = {});
		let base_url = serverURL + "/classes";
		let url = base_url + "/" + class_name + "/";
    if (method != "create") {
      url = url + object_id;
    }

    //Setup data
		let data;
    if (!options.data && model && (method == 'create' || method == 'update')) {
      data = JSON.stringify(model.toJSON());
    } else if (options.query && method == "read") { //query for parse objects
      data = encodeURI("where=" + JSON.stringify(options.query));
    }

		let request = {
      //data
      contentType: "application/json",
      processData: false,
      dataType: 'json',
      data: data,

      //action
      url: url,
      type: type,

      //authentication
      headers: {
          "X-Parse-Application-Id": appId,
      }
    };

    return $.ajax(_.extend(options, request));
	};

}