I would like to add atrribute with layer name using field calculator for many input layers and later merge updated layers into one. I am able to use multiple input layer in modeler and later merge them, but I have no clue how to add field calculator algorithm before as it seems not to allow multiple input.
I need field calculator on place of red square to add layer name before merging. There is also issue as data types of inputs are not fully consistent for ID (Int and Int64) taht is not passing merge tool, but merge from MMQGIS plugin is dealing with it alright. Plugin algorithms are not available in modeler.