How to get response.body data in iOS client : Progress Kinvey

M

Mark L

started a topic over 6 years ago

I am using saveObject method on the client side (iOS) and in the doPreSave method set

response.body = {message: "Some text "};

response.complete(201);

upon certain condition so the object is not saved and the message sent back to the user. However, I can't find a way to get that response.body value in the client. objectsOrNil contains the same object to be saved that was sent via request and not the message I need to pass to the user.

Best Answer

P

Pranav J said over 6 years ago

Hey Mark,

In your collection->PreSave hook(), you can handle the condition as an error condition as below:

if (!result._id) { 
 response.error("No Rooms Available");
}

In your iOS code, you can retrieve the error message using localizedFailureReason:

store.saveObject(
            jobRole1,
            withCompletionBlock: { (objectsOrNil: [AnyObject]!, errorOrNil: NSError!) -> Void in
                if errorOrNil != nil {
                    //save failed
                    NSLog("Save failed with error: %@", errorOrNil.localizedFailureReason!)
                   
                } else {
                    //save was successful
                    NSLog("Successfully saved”)
                }
            },
           
    withProgressBlock: nil
        )

Let me know if it works for you.

Thanks,
Pranav
Kinvey Support

W

Wani

said over 6 years ago

Hi,

As you can see in the documentation http://devcenter.kinvey.com/ios/guides/datastore#Saving for saveObject method of iOS SDK, the method always returns an array of objects on success.

I would suggest you go through Business Logic Guide: http://devcenter.kinvey.com/ios/guides/business-logic to understand the use of collection hooks better.

Ideally, you should use in response.continue in case of success for presave hooks and response.error to report an error.
The returned object contains the complete objecct saved in the backend.

Regards,

Wani

Kinvey Support

M

Mark L

said over 6 years ago

Hello Wani,

Thank you for the prompt reply. I have read and used the guides since working with Kinvey SDK. It is this tutorial example has inspired me for this approach.

http://devcenter.kinvey.com/ios/tutorials/bl-using-collection-hooks-effectively

A feature of the app we develop has a similar reservation use case. So this code from the tutorial returns a message

// If no rooms found, End the request without saving, // with a message of "no room available"

if (!result._id) { response.body = {message: "No Rooms Available"};

response.complete(); // completes the request and returns the result to the client

}

The question is how do you extract this message on the client side if the object is not saved as is the case in this example. I totally understand the usual case when the object is saved.

Thank you,

Mark

P

Pranav J

said over 6 years ago

Answer

Hey Mark,

In your collection->PreSave hook(), you can handle the condition as an error condition as below:

if (!result._id) { 
 response.error("No Rooms Available");
}

In your iOS code, you can retrieve the error message using localizedFailureReason:

store.saveObject(
            jobRole1,
            withCompletionBlock: { (objectsOrNil: [AnyObject]!, errorOrNil: NSError!) -> Void in
                if errorOrNil != nil {
                    //save failed
                    NSLog("Save failed with error: %@", errorOrNil.localizedFailureReason!)
                   
                } else {
                    //save was successful
                    NSLog("Successfully saved”)
                }
            },
           
    withProgressBlock: nil
        )

Let me know if it works for you.

Thanks,
Pranav
Kinvey Support

M

Mark L

said over 6 years ago

Hi Pranav,

I think it is a good enough solution and should work for us although we may or may not have to check for a real error in the message, not sure at this point.

Thanks

Mark

.

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