How do I put the coordinates (x,y) of the end point of the shortest path algorithm (from vector to point) which is part of a QGIS model?
I'd like to get the calculated coordinates of a point (with the field calculator), that is an input of the model, and use this in the end point of the shortest path algorithm.
I want to avoid to put the coordinates as a string input of the model, but use the calculated coordinates of the point in input.
You can use this expression in the End point parameter in the Shortest path model algorithm:
attribute(get_feature_by_id('lyr_with_coords', 1), 'coordinates') Where lyr_with_coords is the output of the Field calculator algorithm.
The expression gets the first (and only in my case) feature from the layer lyr_with_coords, and from that feature it gets the attribute value from the field coordinates (which is the result of an expression that generates the coordinates).
Shortest path algorithm, change the input for End point from Value to Pre-calculated Value (which allows an expression)
Field calculator output in the expression for the End point parameter
End point geometry must be very precise, it must be exactly on the network for a route to be calculated. If your calculated coordinates are not, you will have to add a step to find the nearest point on the network from your calculated point. To test I used vertex snapping with a new point layer and just calculated the $x,$y as a shortcut to get come coordinates. End point parameter from Value to Pre-calculated Value). Apologies, I missed that in my answer intially. lyr_with_coords) and adds it to the canvas before picking it up again to use. I couldn't get Shortest path to recognise the output directly wthout making a new layer.