在保存模型可能时,正在处理ember-data中的定制服务器端错误 [英] is handling custom server side errors in ember-data when saving model possible
问题描述
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,我说我有一个只有两个属性name和value的模型。当我做:
Is there proper way to handle custom error when saving a model? To give an example, lets say I have a model with just two properties "name" and "value". And when I do :
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,然后做保存。我只是想知道这里最好/优雅的方法是什么。
One way to work around this is to make extra ajax call to check if the name is unique and then do the save. I am just wondering what is the best/elegant approach here.
谢谢,
Dee
Thanks, Dee
编辑:我认为这可能有助于在服务器端给出更多的上下文。所以这里是:
EDIT : I thought it might help a bit to give more context on the server side of the things in groovy. So here it is:
在我的控制器我有:
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 http://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:
Then in my ember controller:
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
}
});
推荐答案
deleteRecord
将删除记录。
myModel.save().then(function(response) {
//if success
//server responded with {"myModel:{"id":1,"name":"someName","value":"someValue"}"}
},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();
}
});
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