Question

我正在尝试使用Ember + Rails做一个简单的CRUD应用程序，并且在尝试转到/workouts路径时遇到以下错误。

Error while loading route: TypeError {} ember.js?body=1:415
Uncaught TypeError: Object function () {
    if (!wasApplied) {
      Class.proto(); // prepare prototype...
    }
    o_defineProperty(this, GUID_KEY, undefinedDescriptor);
    o_defineProperty(this, '_super', undefinedDescriptor);
    var m = meta(this), proto = m.proto;
    m.proto = this;
    if (initMixins) {
      // capture locally so we can clear the closed over variable
      var mixins = initMixins;
      initMixins = null;
      this.reopen.apply(this, mixins);
    }
    if (initProperties) {
      // capture locally so we can clear the closed over variable
      var props = initProperties;
      initProperties = null;

      var concatenatedProperties = this.concatenatedProperties;

      for (var i = 0, l = props.length; i < l; i++) {
        var properties = props[i];

        Ember.assert("Ember.Object.create no longer supports mixing in other definitions, use createWithMixins instead.", !(properties instanceof Ember.Mixin));

        for (var keyName in properties) {
          if (!properties.hasOwnProperty(keyName)) { continue; }

          var value = properties[keyName],
              IS_BINDING = Ember.IS_BINDING;

          if (IS_BINDING.test(keyName)) {
            var bindings = m.bindings;
            if (!bindings) {
              bindings = m.bindings = {};
            } else if (!m.hasOwnProperty('bindings')) {
              bindings = m.bindings = o_create(m.bindings);
            }
            bindings[keyName] = value;
          }

          var desc = m.descs[keyName];

          Ember.assert("Ember.Object.create no longer supports defining computed properties.", !(value instanceof Ember.ComputedProperty));
          Ember.assert("Ember.Object.create no longer supports defining methods that call _super.", !(typeof value === 'function' && value.toString().indexOf('._super') !== -1));
          Ember.assert("`actions` must be provided at extend time, not at create time, when Ember.ActionHandler is used (i.e. views, controllers & routes).", !((keyName === 'actions') && Ember.ActionHandler.detect(this)));

          if (concatenatedProperties && indexOf(concatenatedProperties, keyName) >= 0) {
            var baseValue = this[keyName];

            if (baseValue) {
              if ('function' === typeof baseValue.concat) {
                value = baseValue.concat(value);
              } else {
                value = Ember.makeArray(baseValue).concat(value);
              }
            } else {
              value = Ember.makeArray(value);
            }
          }

          if (desc) {
            desc.set(this, keyName, value);
          } else {
            if (typeof this.setUnknownProperty === 'function' && !(keyName in this)) {
              this.setUnknownProperty(keyName, value);
            } else if (MANDATORY_SETTER) {
              Ember.defineProperty(this, keyName, null, value); // setup mandatory setter
            } else {
              this[keyName] = value;
            }
          }
        }
      }
    }
    finishPartial(this, m);
    this.init.apply(this, arguments);
    m.proto = proto;
    finishChains(this);
    sendEvent(this, "init");
  } has no method 'find'

我的代码位于：https://github.com/ecl1pse/ember-workouts

我做错了什么？

编辑：经过进一步调查，我认为罪魁祸首是

EmberWorkouts.WorkoutsRoute = Ember.Route.extend(
  model: -> EmberWorkouts.Workout.find()

这实际上并没有返回任何东西。我该如何从那里进行调试？

如果我用这个替换

EmberWorkouts.WorkoutsRoute = Ember.Route.extend
  model: -> [{title: 'hi'}, {title: 'damn'}]

视图实际呈现内容。

如何正确地从Rails中收集模型？

Answer 1

Ember Data的界面在当前版本中有所改变：

您可以完全清除store.js文件。 Ember Data将使用REST适配器自动为您设置数据存储（除非您另有说明）。
请改用model: -> @store.find('workout')。

我用你的应用程序对它进行了测试，但它确实有效。

如果您在过去一周或两周内没有通读Ember Data Guide（它发生了很大变化），我会花几分钟时间。

Answer 2

对我来说，修复此错误（从ember-data 1.0.0.beta.6开始）是为了确保从服务器返回的JSON包含每个模型的“id”字段，但不要显式声明设置Ember DS.Model时的ID。

jbuilder模板：

json.scans do
  json.array! @scans do |scan|
    json.id scan.id # This prop has to be there
    json.name scan.name
  end
end

Ember模特：

EmberApp.Scan = DS.Model.extend(
  // Don't include the id prop here
  name: DS.attr("string")
)

为什么我在基本的Rails + Ember应用程序中收到此错误？

2 个答案: