findRecord with slug support

adapters.application.js

import Adapter from "ember-data/adapters/json-api";

export default Adapter.extend({
  
  urlForQueryRecord({ slug }, modelName) {
    if (slug) {
      return this.urlForFindRecord(slug, modelName);
    }
    
    return this._super(...arguments);
  },
  
  dataForRequest({ requestType, query }) {
    // remove :slug query param for queryRecord,
    // since the slug is encoded in the URL already as id
    if (requestType === "queryRecord") {
      delete query.slug;
    }
    
    return this._super(...arguments);
  },

  // sortQueryParams needs to be used in ember-data <= 2.6,
  // as there is no other way to modify query params
  // the above-used dataForRequest will _probably_ be available
  // in 2.7, when ds-improved-ajax is enabled
  XXXsortQueryParams(options) {
    delete options.slug;
    return this._super(...arguments);
  }
});

initializers.pretender.js

export function returnJSON(status, body) {
  return json(...arguments);
};

export function json(status, body) {
  if (arguments.length === 1) {
    body = status;
    status = 200;
  }
  
  return [
    status,
    { "Content-Type": "application/json" },
    JSON.stringify(body)
  ];
};

export const server = new Pretender();

export function initialize() {
  server.handledRequest = function(verb, path, request) {
    console.log(`handled request to ${verb} ${path}`);
  }

  server.unhandledRequest = function(verb, path, request) {
    console.log(`undhandled request ${verb} ${path}`);
  }
};

export default {
  name: 'pretender',
  initialize
};

models.person.js

import Model from "ember-data/model";
import attr from "ember-data/attr";
import { belongsTo, hasMany } from "ember-data/relationships";

export default Model.extend({
  name: attr()
});

routes.application.js

import Ember from 'ember';
import { server, json } from '../initializers/pretender';

server.map(function() {
  this.get('/people/:idOrSlug', function() {
    return json({
      data: {
        type: 'person',
        id: 1,
        attributes: {
          name: 'George Michael Bluth'
        }
      }
    });
  });
});

export default Ember.Route.extend({
  model: function() {
    return this.store.findRecord('person', 'mr-manager');
  },

  afterModel(mrManager)  {
    let personWithId1 = this.store.peekRecord('person', 1);
    console.log("equality: ", personWithId1 === mrManager);
    
    // trigger a request in the background to show that
    // the :slug query param is stripped correctly from
    // the findRecord call
    this.store.findRecord('person', 1);
  }
});

serializers.application.js

import Serializer from "ember-data/serializers/json-api";

export default Serializer.extend();

services.store.js

import Store from 'ember-data/store';

export default Store.extend({
  
  init() {
    this._super(...arguments);
    
    this.modelSlugCache = Ember.MapWithDefault.create({
      defaultValue() {
        // this map will contain id -> slug and id -> id mappings
        return Ember.Map.create();
      }
    });
  },

  findRecord(modelName, idOrSlug, ...args) {
    let slugCache = this.modelSlugCache.get(modelName);
    
    // idOrSlug needs to be coerced into string
    let id = slugCache.get(`${idOrSlug}`);
    
    // if we have an id already, re-use findRecord
    // behavior of DS.Store
    if (id) {
      return this._super(modelName, id, ...args);
    }
    
    // we have no mapping for the possible slug yet, so let's
    // do a queryRecord and setup the cache once we have the
    // id <--> slug mapping
    const slug = idOrSlug;
	  return this.queryRecord(modelName, { slug }).then((record) => {
      // tell the cache about the new mapping
      const id = record.get('id'); 
      slugCache.set(slug, id);
      
      // setup id -> id mapping, so the original findRecord
      // behavior is maintained, once a record found via the
      // slug is in the store and the record is requested
      // again via store.findRecord("modelName", id)
      // if we don't setup the id -> id mapping here, then the
      // above `if (id)` path is never taken
      slugCache.set(id, id);
      
      // return the record to simulate findRecord behavior
      return record;
    });
  }

});

templates.application.hbs

Name: {{model.name}}

twiddle.json

{
  "version": "0.7.2",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "release",
    "ember-data": "beta",
    "ember-template-compiler": "release",
    "route-recognizer": "https://rawgit.com/tildeio/route-recognizer/56f5fcec6ae58d8e86b5dc77609809fb91198142/dist/route-recognizer.js",
    "FakeXMLHttpRequest": "https://rawgit.com/pretenderjs/FakeXMLHttpRequest/23c3a96b5b24f1bfe595867437e4f128a29c2840/fake_xml_http_request.js",
    "pretender": "https://rawgit.com/pretenderjs/pretender/c6de9afe18b1472aded2592f5a80ad9a26a0e262/pretender.js"
  }
}