Angular resource.$query() and error condition

Angular resource.$query() and error condition

I am using a service to return list of files. This service returns following.
Success case: List of file object in json format as given below with HTTP
code as 200
[{"_id:"3453534","name":"File 1"},{"_id:"5756753","name":"File 2"}]
Failure case: This returns error response with error message as HTTP error
code 500.
{errorMessage: "No files found for ptoject id 522b9358e4b0bab2f88a1f67"}
I am using following "query" method invoke this service.
//get the new value of files as per changed project id
scope.files = ProjectFile.query({ projectid: scope.project._id
}, function (response) {
//Check if service response is success/fail
if (response.servicestatus != undefined) {
//this is error case. Show error message.
alert("Failed to load list of files for this project:
" + response.errorMessage);
}
else {
//update scope
scope.files = response;
}
});
Problem I am facing is response object which is converted by $query()
method. I am getting response as an array which seems incorrect. Not sure
why $query() is also expecting error response as array. In error case; I
am getting response as array as below
response[0][0]="N";
response[0][1]="o";
response[0][2]="";
response[0][3]="f";
response[0][4]="i";
response[0][5]="l";
response[0][6]="e";
response[0][7]="s";
....
....
I am not sure why $query() is behaving like this. Not sure how to handle
it in correct way. Please help.