我在GitHub上找到了https://github.com/dgeb/ember_data_example下的ember-data的一个很好的工作示例,并尝试通过嵌套资源('has_many:comments')扩展它.在原始示例中,每次打开编辑视图时都会创建一个新事务,如果编辑模式处于离开状态,则会提交/回滚该事务.
我想在content.comments中添加一条新评论我无法做到并且因为"内容"已经在事务中而出现错误(错误:断言失败:一旦记录发生变化,您就无法将其移动到另一个事务中).
这个想法我试图意识到错了,我必须采取另一种方式吗?
App.EditContactController = Em.Controller.extend({
content: null,
addComment: function () {
// ERROR here:
this.get('content.comments').addObject(App.Comment.createRecord({body: ''}));
},
enterEditing: function() {
this.transaction = this.get('store').transaction();
if (this.get('content.id')) {
this.transaction.add(this.get('content'));
} else {
this.set('content', this.transaction.createRecord(App.Contact, {}));
}
},
exitEditing: function() {
if (this.transaction) {
this.transaction.rollback();
this.transaction = null;
}
},
updateRecord: function() {
// commit and then clear the transaction (so exitEditing doesn't attempt a rollback)
this.transaction.commit();
this.transaction = null;
}
});
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