保存模型时是否有正确的方法来处理自定义错误？举个例子,假设我的模型只有两个属性“name”和“value”.当我这样做时：
var myModel = this.get('store').createRecord('myModel',{"name": "someName","value": "someValue"});
myModel.save().then(function() {
//if success
//server responded with {"myModel:{"id":1,"name":"someName","value":"someValue"}"}
},function() {
//if failure
//server responded with {"error":"some custom error message"}
//BUT HOW TO CATCH THIS AND POSSIBLY REMOVE THE MODEL FROM THE STORE
});
解决此问题的一种方法是进行额外的ajax调用以检查名称是否唯一,然后执行保存.我只是想知道这里最好/最优雅的方法是什么.
谢谢,
迪伊
编辑：我认为在groovy中为事物的服务器端提供更多上下文可能会有所帮助.所以这里是：
在我的控制器中我有：
def create() {
try {
newRow = someService.create(params)
render someService.list(newRow) as JSON//returns data in format needed by ember-data
}
catch (ValidationException ex) {
def errors = ["errors":[]]
ex.errors.allErrors.each{
if(it.arguments[0] == "fieldName" && it.code=="constrantViolated"){
errors.errors.push(["field":it.arguments[0],"message":"some custom message"])
}
}
//I am using 422 here because of post in https://stackoverflow.com/questions/7996569/can-we-create-custom-http-status-codes
render(status: 422,contentType: 'JSON',text: (errors as JSON))
}
}
然后在我的余烬控制器中：
var myModel = self.get('store').createRecord('myModel ',myModelDataInjsON);
myModel .save().then(function () {
//if success
},function (response) {
myModel .deleteRecord();
var errors = $.parseJSON(response.responseText);
for (var key in errors.errors) {
//do something
}
});
解决方法
deleteRecord将删除记录.
myModel.save().then(function(response) {
//if success
//server responded with {"myModel:{"id":1,function(response) {
//if failure
//server responded with {"error":"some custom error message"}
//BUT HOW TO CATCH THIS AND POSSIBLY REMOVE THE MODEL FROM THE STORE
if(response.error=='no good'){
myModel.deleteRecord();
}
});