Editor: ajax function, question about Error callback vs return: false
Editor: ajax function, question about Error callback vs return: false
Long story short, I'm processing data from SQL manually for Editor. I'm using JavaScript. Basically, I pass the success callback function as a parameter to another part of my application that receives/processes the data returned from SQL. Of course, I make sure I structure the data appropriately for Editor's success callback function.
/*
PSEUDO CODE !! :)
*/
//Editor: Ajax configuration for form data submission.
ajax: function (method, url, data, successCB, error) {
//manipulate the form data here
doTheThing(successCB);
};
//elsewhere in my application
doTheThing: function (data, options) {
successCB = options;
jsonStructureFromServer = data;
successCB(jsonStructureFromServer);
};
My question:
I know the expected structure for the success callback; however, what is the expected json structure for the error callback? What does the error callback function do?
Basically, my JavaScript app handles errors from SQL in a specific way. If data is submitted, and SQL kicks back an error, no JSON is returned for the success callback to act upon, and the opened form just hangs.
I assume I should use the error callback to handle errors from SQL? I'm pretty sure I can pass the error callback function to the area of my application that handles errors.
What's the best way I can tell Editor that an error occurred on the server, and it should just close the open form?
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Answers
OK, so I may be making this more complicated than necessary, but I look forward to your responses anyway.
I've discovered that the success callback function can process "errors" too.
So, basically, in the part of my application that receives/processes the erorr, I create an object with an error string, and run the success callback against it:
Atleast now the form window can close. It's not the sexiest, but it works. Unless y'all know a better way.
There is an important distinction to make between what the
successanderrorfunctions do. Callsuccesswhenever the processing on the server is complete - including validation errors!The parameters you can send back for errors are documented here.
So
.
successis for correctly handled actions on the server.erroris for when it all breaks down - uncaught exceptions, invalid JSON that kind of thing. In theory it should never be calledAllan