ember数据串行器数据映射 [英] ember data serializer data mapping
问题描述
App = Ember.Application.create();
DS.RESTAdapter.configure(
plurals,{
category:'categories'
}
);
App.Store = DS.Store.extend({
revision:12,
adapter:DS.RESTAdapter.create({
url:'app'
})
});
App.Router.map(function(){
this.resource('categories');
});
App.CategoriesRoute = Ember.Route.extend({
model:function(){
return App.Category.find();
}
});
var attr = DS.attr;
App.Category = DS.Model.extend({
name:attr('string')
});
现在这个测试服务器可以正常工作。
使用以下JSON
{
类别:[
{
name:Beef,
id:1
},
{
name:Pork,
id
}
]
}
然而在生产中,服务器提供以下json:
{
success:true,
message:请求成功,
total:2,
data:[
{
name:Beef,
id:1
},
{
name:Pork,
id:2
}
]
}
我不能为我的生活,如何使用序列化程序来使用活的json。任何帮助将不胜感激。感谢提前。
更新:
我以前尝试编写序列化程序,但它不似乎正在工作...
见下文
Store = DS.Store.extend({
revision:12,
adapter:DS.RESTAdapter.create({
url:'app',
serializer:DS.RESTSerializer。扩展({
extract:function(loader,json,type,record){
var root ='data';
this.sideload(loader,type,json,root);
this.extractMeta(loader,type,json);
if(json [root]){
if(record){loader.updateId(record,json [root]);}
this.extractRecordRepresentation(loader,type,json [root]);
}
}
})
})
});
现在产生此错误未捕获错误:断言失败:您的服务器返回哈希与关键数据,但您没有映射
您有2个选项
- 使您的服务器兼容,并让它返回json作为余烬数据预期,
- 写你的自己的适配器/序列化程序支持这种格式。
更新:编写自己的序列化程序
更新2:摆脱未使用的函数
您可以从 DS.RESTSerializer
继承,并使用此代码更改 extract
p>
extract:function(loader,json,type,record) {
var root ='data';
if(json [root]){
if(record){loader.updateId(record,json [root]); }
this.extractRecordRepresentation(loader,type,json [root]);
}
}
这假设请求的内容将始终处于您的json的数据
键。
I'm using ember & ember-data to try and consume a json feed from the server. Here is my code:
App = Ember.Application.create();
DS.RESTAdapter.configure(
"plurals", {
category: 'categories'
}
);
App.Store = DS.Store.extend({
revision: 12,
adapter: DS.RESTAdapter.create({
url: 'app'
})
});
App.Router.map(function(){
this.resource('categories');
});
App.CategoriesRoute = Ember.Route.extend({
model: function() {
return App.Category.find();
}
});
var attr = DS.attr;
App.Category = DS.Model.extend({
name: attr('string')
});
Now this works fine with a testing server. Using the following JSON
{
"categories":[
{
"name":"Beef",
"id":1
},
{
"name":"Pork",
"id":2
}
]
}
However in production the server provide the following json:
{
"success":true,
"message":"Request successful",
"total":2,
"data":[
{
"name":"Beef",
"id":1
},
{
"name":"Pork",
"id":2
}
]
}
I can't for the life of me work out how to use the serializer to consume the live json. Any help would be appreciated. Thanks in advance.
UPDATE:
I've since tried to write the serializer but it doesn't appear to be working...
see below
App.Store = DS.Store.extend({
revision: 12,
adapter: DS.RESTAdapter.create({
url: 'app',
serializer: DS.RESTSerializer.extend({
extract: function(loader, json, type, record) {
var root = 'data';
this.sideload(loader, type, json, root);
this.extractMeta(loader, type, json);
if (json[root]) {
if (record) { loader.updateId(record, json[root]); }
this.extractRecordRepresentation(loader, type, json[root]);
}
}
})
})
});
Which now produces this error Uncaught Error: assertion failed: Your server returned a hash with the key data but you have no mapping for it
You have 2 options
- make your server compatible, and let it returns the json as ember data expects it,
- write your own adapter/serializer to support this format.
UPDATE: write your own serializer UPDATE 2: get rid of unused functions
You can inherit from the DS.RESTSerializer
and change extract
with this code
extract: function(loader, json, type, record) {
var root = 'data';
if (json[root]) {
if (record) { loader.updateId(record, json[root]); }
this.extractRecordRepresentation(loader, type, json[root]);
}
}
This assumes that the content of request will always be under the data
key of your json.
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