How do I check if a value already exists in the Parse data class Android… here is a solution to the problem.
How do I check if a value already exists in the Parse data class Android
I’m looking for a way to check if a phone number already exists in Android’s Parse data class.
For example, check if a phone number already exists, return true if it exists, otherwise return false.
I’ve used this :
query1.whereEqualTo("phone", "0644444444");
query1.findInBackground(new FindCallback<ParseObject>() {
It didn’t help much.
Solution
Use getFirstInBackground() in the query and then simply check for ParseException.OBJECT_NOT_FOUND exceptions. If it exists, the object does not exist, otherwise it exists! Using getFirstInBackground is preferable to findInBackground because getFirstInBackground only checks and returns 1 object, whereas findInBackground may have to query many objects.
Example
query1.whereEqualTo("phone", "0644444444");
query1.getFirstInBackground(new GetCallback<ParseObject>()
{
public void done(ParseObject object, ParseException e)
{
if(e == null)
{
object exists
}
else
{
if(e.getCode() == ParseException.OBJECT_NOT_FOUND)
{
object doesn't exist
}
else
{
unknown error, debug
}
}
}
});