Can't set Loaded Layer Name to input name in Load Layer into Project using QGIS Model Designer

Question

I am designing a simple model to automate the loading and styling of new layers in a QGIS project. The idea is to use "Set layer style" to apply style settings from a QML file then load the layer into the project. I cannot, however, figure out how to add the layer to the project using layer's filename. The only thing that works is setting a static name ("Value") in "Loaded Layer Name", but this would be the same for every layer loaded. I've tried using a Pre-Calculated Value with the name of the input (@Input_vector), but this does not work.

This seems to be related to issues recalling the variables associated with inputs, but I can't find any workable solution.

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• Matt: It's a polyline shapefile layer
• Matt: No, that's why I'm using "Load layer into project"

Answer 1

Use layer_property() function:

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Alternative: @layer_ids[0] (or your Layer number).

I am learning myself, so hope to hear as well on why just @input_vector produce Null.

Set_layer_style seems to work without including into dependencies (comment if/when have to be otherwise).

• Babel: I think the behaviour has to do with the fact that the variable @input_vector refers to the layer itself, whereas the Loaded layer name requires a textstring (layer's name), not the refererence to a layer which is not a string. That's why you have to call the name using the function layer_property().