[英]Errors in Ember-Data on using findAll() function
我有一個后端服務器(在node.js上運行),我使用Ember(v 2.0.2)和Ember-data(2.0.0)和JQuery(2.1.4)。 node.js有body-parser和express安裝。 前端庫是Ember,Ember-data和JQuery
當我取的App.js文件中使用.findAll()方法在app.ContactsRoute功能數據,我得到在Chrome開發者控制台以下錯誤
處理路由時出錯:聯系人斷言失敗:您必須在傳遞給'push'的對象中包含未定義的'id'錯誤:斷言失敗:您必須在傳遞給'push'的對象中包含未定義的'id'錯誤(原生)
本地主機網站鏈接還顯示此錯誤,顯示Ember-template-compiler和Ember-data行中的錯誤。 由於在問題中發布超鏈接的限制,因此無法在問題中發布
Server.js文件:
var express = require('express'),
bodyParser = require('body-parser'),
app=express();
var id = 7;
var data = {
1: {id:1, firstName: 'Danny', lastName: 'Stork', email: 'dannystork@example.com'},
2: {id:2, firstName: 'Carlotta', lastName: 'McOwen', email: 'carlottamcowen@example.com'},
3: {id:3, firstName: 'Luther', lastName: 'Ellery', email: 'lutherellery@example.com'},
4: {id:4, firstName: 'Finch', lastName: 'Hosky', email: 'finchhosky@example.com'},
5: {id:5, firstName: 'Carson', lastName: 'Andrews', email: 'carsonandrews@example.com'},
6: {id:6, firstName: 'Mac', lastName: 'Parker', email: 'macparker@example.com'},
7: {id:7, firstName: 'J.D.', lastName: 'Barney', email: 'jdbarney@example.com'},
};
app.use(bodyParser.json());
app.use(express.static('./public'));
app.route('/api/contacts')
.get(function(req,res){
res.json(Object.keys(data).map(function(key){
return data[key];
}));
})
.post(function(req,res){
var record = req.body
record.id = ++id;
data[record.id] = record;
res.json(record);
});
app.route('/api/contacts/:id')
.get(function(req,res){
res.json(data[req.params.id]);
})
.put(function(req,res){
data[req.params.id]=req.body;
res.json(req.body);
})
.delete(function(req,res){
delete data[req.params.id];
res.json(null);
});
app.get('*', function(req,res){
res.sendFile(__dirname + '/public/index.html');
});
app.listen(3000);
app.js文件:
var app = Ember.Application.create();
app.ApplicationAdapter = DS.RESTAdapter.extend({
namespace:'api'
});
app.Contact = DS.Model.extend({
firstName: DS.attr('string'),
lastName: DS.attr('string'),
email: DS.attr('string')
});
app.ContactSerializer = DS.RESTSerializer.extend({
extractArray: function(store, primaryType, payload){
payload ={contacts: payload} ;
return this._super(store,primaryType,payload);
},
extractSingle: function(store, primaryType, payload, recordId){
payload ={contact: payload} ;
return this._super(store,primaryType,payload,recordId);
},
serializeIntoHash: function(hash,type, snapshot,option){
var json = this.serialize(snapshot, {included:true});
Object.keys(json).forEach(function(key){
hash[key] = json[key];
});
}
});
//to get pushstate routes instead of hashbang routes - #!
//access the app.Router class and set the location
app.Router.reopen({
location: 'history'
});
//routes
app.Router.map( function(){
//this.resource used when there is a noun or object behind e.g. /contacts or /contact/:id
//this.route used when there is no noun or object behind it e.g. /contact/new (no existing data is present)
this.route('contacts');
this.route('contact',{path: 'contacts/:contact_id'});
this.route('new',{path: 'contacts/new'});
});
//this is used for the default route when it doesn't match any other routes in the above list of routes.
app.IndexRoute = Ember.Route.extend({
redirect: function(){
this.transitionTo('contacts');
}
});
app.ContactsRoute = Ember.Route.extend({
model: function() {
return this.store.findAll('contact');
}
})
index.html的:
<html>
<head>
<title> Ember Contacts </title>
<link rel='stylesheet' href='/style.css' />
<base href="/">
</head>
<body>
<!-- This is like the app class (here id = application is used) defined as top level template -->
<!-- This is common to all our pages -->
<script type='text/x-handlebars' id='application'>
<div id='main'>
<header>
<h1> {{#link-to 'contacts'}} Ember Contacts {{/link-to}}</h1>
</header>
<div id='app'>
{{outlet}}
</div>
</div>
</script>
<script type='text/x-handlebars' id='contacts'>
<div class='actions'>
{{#link-to 'new'}} NEW Contact {{/link-to}}
</div>
<ul>
{{#each contact in model}}
<li>
{{#link-to 'contact' contact}}
{{contact.firstName}} {{contact.lastName}} <span>{{contact.email}}</span>
{{/link-to}}
</li>
{{/each}}
</ul>
</script>
<script src='/lib/jquery/dist/jquery.min.js'></script>
<script src='/lib/ember/ember-template-compiler.js'></script>
<script src='/lib/ember/ember.debug.js'></script>
<script src='/lib/ember-data/ember-data.js'></script>
<script src='/app.js'></script>
</body>
</html>
有人可以幫忙解決這個問題嗎? 為什么這個錯誤會出現在ember-data中?
我是ember.js的新手,正在完成一個教程。 我無法使用他在視頻中使用的相同版本。 因此使用了最新版本的Ember和Ember數據。
我已經使它適用於最新版本。 從您的代碼中更改了以下內容:
在App.js中 :
內部app.ContactSerializer = DS.RESTSerializer.extend({
function:
extractArray
函數已更改為新函數normalizeFindAllResponse
(注意,更改此函數時參數也已更改)。 該功能現在看起來像:
normalizeFindAllResponse: function(store, primaryModelClass, payload, id, requestType){ payload = {contacts: payload}; return this._super(store, primaryModelClass, payload, id, requestType); },
extractSingle
函數已更改為新函數normalizeFindRecordResponse
(注意,更改此函數時參數也已更改)。 該功能現在看起來像:
normalizeFindRecordResponse: function(store, primaryModelClass, payload, id, requestType){ payload ={contact: payload} ; return this._super(store, primaryModelClass, payload, id, requestType); },
在Index.html中 ,在<ul>
標記內,將“ {{#each contact in model}}
”更改為“ {{#each model as |contact|}}
”。 並刪除Handlebars參考<script src='/lib/handlebars/handlebars.js'> </script>
。 最新版本的Ember不需要明確引用Handlebars。
希望這會有所幫助,因為這些變化非常突出,可以推進到更新版本,因此很高興能夠使用最新版本。
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