Ember.js 余烬数据查找使用使用其他查找获取的模型';s结果
我正在使用此设置:Ember.js 余烬数据查找使用使用其他查找获取的模型';s结果,ember.js,ember-data,Ember.js,Ember Data,我正在使用此设置: Ember : 1.10.0 Ember Data : 1.0.0-beta.16 jQuery : 1.11.2 ember-localstorage-adapter: 0.5.2 我设法使用ember cli在我的数据存储(Localstorage)中存储了一些数据 现在,我想检索数据。我的模型中有3个类: mtg-item.js name: DS.attr('string'), material: DS.attr('string'), d
Ember : 1.10.0
Ember Data : 1.0.0-beta.16
jQuery : 1.11.2
ember-localstorage-adapter: 0.5.2
我设法使用ember cli在我的数据存储(Localstorage)中存储了一些数据
现在,我想检索数据。我的模型中有3个类:
mtg-item.js
name: DS.attr('string'),
material: DS.attr('string'),
description: DS.attr('string')
mtg-point.js
long: DS.attr('string'),
lat: DS.attr('string')
mtg-item-at-point.js
item: DS.belongsTo('mtgItem', {inverse: null}),
position: DS.belongsTo('mtgPoint', {inverse: null})
以下是localstorage中的数据:
mantrailling-item: "{"mtgItem":{"records":{"an0jf":{"id":"an0jf","name":"chaussette","material":"tissu","description":"carré de tissus"}}}}"
mantrailling-item-at-point: "{"mtgItemAtPoint":{"records":{"r7v07":{"id":"r7v07","item":"an0jf","position":"qqnpa"}}}}"
mantrailling-point: "{"mtgPoint":{"records":{"qqnpa":{"id":"qqnpa","long":"0","lat":"0"}}}}"mantrailling-style: "{"mtgStyle":{"records":{"rggrm":{"id":"rggrm","name":"default","path":null}}}}"__proto__: Storage
当我尝试检索数据时,检索mtgItem和mtgPoint没有问题。
问题是在尝试检索mtgItemAtPoint时。
我得到一个断言错误:
错误:断言失败:无法将“未定义”记录添加到
“mtgitemapoint.item”。您只能将“mtgItem”记录添加到此
关系
调试时,我注意到它是在尝试设置mtgItem时发生的。
我缩小了搜索范围,在文件第70行显示了beans-to.js
var type = this.relationshipMeta.type;
Ember.assert("You cannot add a '" + newRecord.constructor.typeKey + "' record to the '" + this.record.constructor.typeKey + "." + this.key +"'. " + "You can only add a '" + type.typeKey + "' record to this relationship.", (function () {
if (type.__isMixin) {
return type.__mixin.detect(newRecord);
}
if (Ember.MODEL_FACTORY_INJECTIONS) {
type = type.superclass;
}
return newRecord instanceof type;
})());
断言试图检查newRecord是否属于扩展超类型DS.Model
当我在debug中检索值时,以下是type和newRecord的结果:
newRecord.type.__super__.constructor
(subclass of DS.Model)
type
(subclass of DS.Model)
所以我不明白为什么会这样:
return newRecord instanceof type
返回false
为了记录在案,我这样称呼find:
var mtgItem = store.find('mtgItem', {name: "chaussette", material: "tissu"});
mtgItem.then(function(mtgItem) {
var mtgPoint = store.find('mtgPoint', {long: "0", lat: "0"});
mtgPoint.then(function(mtgPoint) {
var mtgItemAtPoint = store.find('mtgItemAtPoint', {item: mtgItem, position: mtgPoint});
});
});
我在睡了几个小时后(像往常一样…)发现 问题是store.find返回的是Ember.Enumerable,而不是记录。因此,您需要通过结果进行迭代,以获得正确的DS.Model对象。在我的例子中,我只需要一条记录,所以我使用的是第一个对象 以下是修复方法:
var mtgItems = store.find('mtgItem', {name: "chaussette", material: "tissu"});
mtgItems.then(function(mtgItems) {
var mtgItem = mtgItems.get("firstObject");
var mtgPoints = store.find('mtgPoint', {long: "0", lat: "0"});
mtgPoints.then(function(mtgPoints) {
var mtgPoint = mtgPoints.get("firstObject");
var mtgItemAtPoints = store.find('mtgItemAtPoint', {item: mtgItem, position: mtgPoint});
});
});