I am using QGIS print composer. I have so many images to export with a specific label. The text of the label is existing in a field of a layer.
I have tried to use this expression
attribute( get_feature( 'Metro_Ring','S','1'),'Route') but the result is NULL.
Metro_Ring --> name or ID of the table
'S' --> the field for selection.
1 --> the value that selects the row of interest.
'Route' --> the name of the field of interest.
I wonder if there is any error or a different method to get the value of the field 'Route' in the label.