我正在尝试使用下拉列表设置belongsTo关系。
所以我有我的图书模型:
import DS from 'ember-data';
export default DS.Model.extend({
// Relationships
author: DS.belongsTo('author'),
name: DS.attr()
});
我的作者模型:
import DS from 'ember-data';
export default DS.Model.extend({
// Relationships
author: DS.hasMany('books'),
name: DS.attr()
});
我的书籍/新途径:
import Ember from 'ember';
export default Ember.Route.extend({
model() {
return Ember.RSVP.hash({
book: this.store.createRecord('book'),
authors: this.store.findAll('author')
})
},
actions: {
saveBook(newBook) {
newBook.book.save().then(() => this.transitionTo('book'));
},
willTransition() {
this.controller.get('book').rollbackAttributes();
}
}
});
我的书籍/新模板:
<label >Book Name</label>
{{input type="text" value=model.name placeholder="Book Name"}}
<label>Author</label>
<select>
{{#each model.authors as |author|}}
<option value="{{author.id}}">
{{author.name}}
</option>
{{/each}}
</select>
<button type="submit"{{action 'saveBook' model}}>Add Book</button>
如果我删除了select元素并只保存了书的名称就可以正常工作了,但是我得到了这个:(其中id是一个自动生成的ID)
Error: Some errors were encountered while saving app@model:book id
at reportError (firebase.js:425)
at firebase.js:445
at tryCatch (ember.debug.js:58165)
at invokeCallback (ember.debug.js:58177)
at publish (ember.debug.js:58148)
at publishRejection (ember.debug.js:58091)
at ember.debug.js:37633
at invoke (ember.debug.js:339)
at Queue.flush (ember.debug.js:407)
at DeferredActionQueues.flush (ember.debug.js:531)
我认为我需要做一些事情,比如获取作者对象并将book.author设置为,但我无法找到明确的解释。特别是因为我甚至无法弄清楚如何从路线中的选择菜单中获取数据!
我觉得我在这里缺少一些非常简单的东西,任何人都有任何见解?
答案 0 :(得分:1)
我建议将此功能移至您所属的controller.js。为什么您在AuthorModel中与书籍的关系称为author
而不是books
?
我建议将你的动作(在控制器中)重写为:
saveBook(newBook) {
newBook.set('author', this.get('selectedAuthor') // or just the call below if you go with the alternative below
newBook.save().then(() => this.transitionTo('book'));
},
现在问题仍然存在,您没有对所选作者进行绑定。我建议使用ember-power-select之类的东西将您选择的作者绑定到控制器属性。
然后你会在模板中执行此操作:
{{#power-select
placeholder="Please select Author"
onchange=(action "authorSelectionChanged")
options=model.authors
as |author|}}
{{author.name}}
{{/power-select}}
在你控制器的actions
中:
authorSelectionChanged(author) {
this.get('model.book').set('author', author);
// or the following if you go with the alternative above
this.set('selectedAuthor', author);
}