How to display a message when rest service returns no rows (... or one row)

[Gregory Vaughan]

This is probably very basic but I'm not seeing it anywhere. I have tried a couple things, for example, mapping a field which will always be present on every record to a local storage variable, and running this javascript on complete:

if (!localStorage.getItem('RecordID'))
{
Appery('error').text('No records meeting criteria found.');
}

No worky. (Actually I think I saw it work once but never again which is even stranger).

Then my next, related question will be, how can I do something conditionally if only one row is returned (for example, I won't have to prompt user to select from a list of options I can skip ahead to next screen)

[Gregory Vaughan]

I found my problem trying to do this with a local storage variable. Need to clear the variable out before invoking the service.

Any suggestions on how to do this better, or for when one row is returned, would be appreciated.

[Illya Stepanov]

Hi Gregory -- you can use
pre
localStorage.removeItem('foo');
/pre

• to remove previously defined 'foo' element in localStorage;

  or you can clear completely all elements in localStorage, before defining a new one:
  pre
  localStorage.clear();
  /pre

[Gregory Vaughan]

Can you tell me how I might go about displaying a message or doing something when a rest service returns only one row?

[Illya Stepanov]

You are using DataBase with data or what exactly is 'a row' which is returning?

[Gregory Vaughan]

It's a php file that makes a json from a mysql query.

[Oleg Danchenkov]

Hi Gregory.
Please check this post https://getsatisfaction.com/apperyio/...