[英]How to update an existing record when creating a record with ember-data
[英]How to handle error/event when the Ember-Data Store do not find any record?
情况是:
这是代码:
App.ApplicationRoute = Ember.Route.extend({
model: function() {
if (this.session.userID) {
return this.store.find('user', this.session.userID).then(function(_user) {
console.log('user found', _user);
return _user;
}, function(error) {
// user does not exist or some other error
console.log('Application Model did not find user in Firebase');
return null;
});
} else {
console.log('Application Model did not find any session.userID');
return null;
}
},
});
我的期望:被告应调用错误函数:
function(error) {
// user does not exist or some other error
console.log('Application Model did not find user in Firebase');
});
错误:但是,出现以下错误:
Error: no record was found at https://dynamicslife.firebaseio.com/users/facebook%3A931321683548734
at https://cdn.firebase.com/libs/emberfire/1.2.7/emberfire.min.js:10:3400
at c (https://cdn.firebase.com/js/client/1.1.2/firebase.js:17:65)
at https://cdn.firebase.com/js/client/1.1.2/firebase.js:123:689
at uc (https://cdn.firebase.com/js/client/1.1.2/firebase.js:50:20)
at Xe (https://cdn.firebase.com/js/client/1.1.2/firebase.js:123:675)
at Ve.Vb (https://cdn.firebase.com/js/client/1.1.2/firebase.js:123:617)
at Ye.Vb (https://cdn.firebase.com/js/client/1.1.2/firebase.js:124:418)
at https://cdn.firebase.com/js/client/1.1.2/firebase.js:139:409
at https://cdn.firebase.com/js/client/1.1.2/firebase.js:68:878
at pc (https://cdn.firebase.com/js/client/1.1.2/firebase.js:62:618) ember.js:14876
Uncaught Error: Assertion Failed: Error: no record was found at https://dynamicslife.firebaseio.com/users/facebook%3A931321683548734
问题:我知道没有记录可以找到。 但是如何处理这种情况并避免引发错误呢? 我的印象是Promise可以让我在系统崩溃前管理错误。
App.ApplicationRoute = Ember.Route.extend({
model: function() {
if (this.session.userID) {
return this.store.find('user', this.session.userID);
} else {
console.log('Application Model did not find any session.userID');
return null;
}
},
afterModel: function(user, transition) {
if (user.get('length') === 0) {
console.log('fail');
} else {
console.log('success');
}
}
});
参见http://emberjs.com/api/classes/Ember.Route.html#method_afterModel
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