Ember数据一对多关系不起作用
Ember Data one to many relationship not working
我对ember还很陌生,但我想知道这是我的逻辑有问题,还是ember中有什么东西不能正常工作。
当我尝试model.get('profile')
时,我会得到null。
我已经能够检索到这样的配置文件模型:this.store.find('profile', 17);
此外,我可以将profile_id属性添加到位置模型中,然后使用它
var location = this.modelFor('location');
var profile = this.store.find('profile', 17);
但根据我在文档中的发现,我应该能够在位置对象上使用.get('profile')
来获取其配置文件。
奇怪的是,我的附件关系(位置有很多附件)非常完美。
我是不是错过了什么?我做错了什么导致这段关系失败?
我有三种型号:
位置->
export default DS.Model.extend({
image: DS.attr('string'),
latitude:DS.attr('string'),
longitude:DS.attr('string'),
outlets:DS.attr('string'),
parking:DS.attr('string'),
internet:DS.attr('string'),
credit_cards:DS.attr('string'),
share_url:DS.attr('string'),
roaster:DS.attr('string'),
about:DS.attr('string'),
name: DS.attr('string'),
address: DS.attr('string'),
images: DS.attr('string'),
attachments: DS.hasMany('attachment'),
profile: DS.belongsTo('profile'),
curator_image: DS.attr('string'),
curator_about: DS.attr('string'),
curator_name: DS.attr('string'),
style_image_url: function(){
return "background-image:url('" + this.get("image") + "')";
}.property("image"),
style_profile_image_url: function(){
return "background-image:url('" + this.get("curator_image") + "')";
}.property("curator_image"),
});
附件->
export default DS.Model.extend({
location: DS.belongsTo('location'),
image:DS.attr('string')
});
配置文件->
export default DS.Model.extend({
location: DS.hasMany('location'),
name:DS.attr('string'),
about:DS.attr('string'),
image:DS.attr('string'),
});
以下是来自服务器的示例响应:locations.json
{
attachments: [
{
id: 254,
image: "https://dripper-dev.s3-us-west-1.amazonaws.com/uploads/large_9443c014-69e1-4616-943d-e627a47f8306.jpg?AWSAccessKeyId=AKIAJPYWBHET4VVL5NUA&Signature=nD3YMiuFiHtpuTPop77Q%2BS6N9HM%3D&Expires=1427847353"
},
{
id: 250,
image: "https://dripper-dev.s3-us-west-1.amazonaws.com/uploads/large_3e562933-5ce2-4f91-bb6f-6fe6883e0463.jpg?AWSAccessKeyId=AKIAJPYWBHET4VVL5NUA&Signature=ESbhuHNjx9kD63gJY3UVRsHs2B8%3D&Expires=1427847353"
}],
locations: [
{
id: 12,
latitude: "45.550346",
longitude: "-122.666584",
address: "3808 North Williams Avenue, Portland, OR 97212, USA",
outlets_text: "Yes",
internet_text: "No",
roaster: "Ristretto Roasters",
parking_text: "Yes",
credit_cards: true,
image: "https://dripper-dev.s3-us-west-1.amazonaws.com/uploads/medium_9b676fc6-814c-4f5f-a03b-5a5f650fc7aa.jpg?AWSAccessKeyId=AKIAJPYWBHET4VVL5NUA&Signature=w5pSN5iJbtlWfiFo2UMcJMN6pAs%3D&Expires=1427847347",
name: "Ristretto",
twitter_username: null,
curator_image: "https://dripper-dev.s3-us-west-1.amazonaws.com/uploads/basic_uploader/Profile/9d77af52-033b-4bd9-8cb4-8b961f366392.jpg?AWSAccessKeyId=AKIAJPYWBHET4VVL5NUA&Signature=YsgxmH%2B5wmlOpVSoti5kn0DozKQ%3D&Expires=1427847347",
curator_name: "Jack White",
curator_about: "this is a test this is a test this is a test this is a test this is a test this is a test this is a test this is a test this is a test this is a test this is a test this is a test this is a test ",
profile_id: 17,
attachment_ids: [
30
]
},
...
路线:/路线/位置.js
export default Ember.Route.extend({
model: function(params) {
return this.store.find('location', params.location_id);
}
});
/路线/位置/索引
export default Ember.Route.extend({
model: function() {
return this.modelFor('location').get('profile');
}
});
更新:我可以通过将json更改为:来获得配置文件模型
{
attachments: [],
locations: [
{
id: 12,
latitude: "45.550346",
longitude: "-122.666584",
address: "3808 North Williams Avenue, Portland, OR 97212, USA",
outlets_text: "Yes",
internet_text: "No",
roaster: "Ristretto Roasters",
parking_text: "Yes",
credit_cards: true,
image: "https://dripper-dev.s3-us-west-1.amazonaws.com/uploads/medium_9b676fc6-814c-4f5f-a03b-5a5f650fc7aa.jpg?AWSAccessKeyId=AKIAJPYWBHET4VVL5NUA&Signature=bhPpdV6bxroZZ0Lfk2jN6aPht7A%3D&Expires=1427916453",
name: "Ristretto",
twitter_username: null,
curator_image: "https://dripper-dev.s3-us-west-1.amazonaws.com/uploads/basic_uploader/Profile/9d77af52-033b-4bd9-8cb4-8b961f366392.jpg?AWSAccessKeyId=AKIAJPYWBHET4VVL5NUA&Signature=K1VuT3Oe8ncTdX%2FA9H7s4XJcQ84%3D&Expires=1427916453",
curator_name: "Jack White",
curator_about: "this is a test this is a test this is a test this is a test this is a test this is a test this is a test this is a test this is a test this is a test this is a test this is a test this is a test ",
profile_id: 17,
profile: {
id: 17,
name: "Jack White",
about: "this is a test this is a test this is a test this is a test this is a test this is a test this is a test this is a test this is a test this is a test this is a test this is a test this is a test ",
action_url: null,
action_caption: null,
published: null,
image: {
url: "https://dripper-dev.s3-us-west-1.amazonaws.com/uploads/basic_uploader/Profile/9d77af52-033b-4bd9-8cb4-8b961f366392.jpg?AWSAccessKeyId=AKIAJPYWBHET4VVL5NUA&Signature=E%2BgWHlMRcIXDeMOTmLhfdU8YyTc%3D&Expires=1427916459"
},
user_id: 9,
created_at: "2015-03-24T20:07:31.043Z",
updated_at: "2015-03-24T20:09:01.518Z"
},
attachment_ids: [
30
]
}, ...
将我的位置对象保存在我到window.loc的路径中,然后签入浏览器控制台:loc.get('profile').get('name')
返回"Jack White"
,这是正确的,但我不清楚为什么这个更改会产生影响。侧加载(放置相关对象的id并包括这些对象的顶级数组)是否只适用于ember数据中的一对多关系?
欢迎任何和所有的输入,我仍然是新的成员数据。
locations.json
中没有侧加载的配置文件对象,就像附件一样。它应该看起来更像:
{
locations: [{
id: 12,
...
profile_id: 17,
attachment_ids: [...]
}],
attachments: [...],
profiles: [...] /* for multiple profiles, or*/
profile: {...} /* for a single side-loaded model */
}
...
否则,如果要异步加载profile
模型,则需要在location
模型中声明如下:
profile: DS.belongsTo('profile', {
async: true
}
我发现解决方案在json中将profile_id: xx
重命名为profile: xx
。我认为model_id是记录关系的正确方式,但事实证明ember只需要模型名称。希望这对将来的人有所帮助!
我可能在这里很笨,但您的Location模型没有Profile字段——可能是因为它属于Profile。但是,如果没有该字段,您将无法在Location上执行.get("配置文件")。
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