Does backendless support nested queries like parse

General
1

Hi,
How to use nested queries ?
If yes please provide any sample code available.

2

Can’t you just use a clause like “child.something = value”? That should return all objects which have a child meeting a certain criteria.

3

Raushan,

Please describe what type of data you need to retrieve.

Regards,
Mark

4

Hi mark,

I am having two tables but there is no relation between these table.
I want to update data in second table based on data fetched from first table.
As per now i have to send multiple request which is not good.
And custom code is not much reliable.
Because its too slow and show 5 sec timeout. For resolving this issue I purchased “expand code execution time to 20sec” package but still getting 5 second timeout sometimes.

5

Sorry, Raushan, but this does not give me enough details. Could you describe more specifically how your data is structured and why you’re doing multiple requests?

6

Async - query object A

from result , use A.property in where clause to async query object b

is it just

Backendless.Data.of( Foo.class ).find( dataQuery, new AsyncCallback<BackendlessCollection<Foo>>()
{
@Override
public void handleResponse( BackendlessCollection<Foo> foo)
{
BackendlessDataQuery dataQuery2 = new BackendlessDataQuery( Boo.Age > Foo.Size );
              Backendless.Data.of( Boo.class ).find( dataQuery2, new AsyncCallback<BackendlessCollection<Boo>>()
{
@Override
public void handleResponse( BackendlessCollection<Boo> boo)
{


}


@Override
public void handleFault( BackendlessFault fault )
{
// an error has occurred, the error code can be retrieved with fault.getCode()
}
});		
}


@Override
public void handleFault( BackendlessFault fault )
{
// an error has occurred, the error code can be retrieved with fault.getCode()
}
});