Description
(Admin: Feel free to remove this line, the brackets in the title, and add the actual "feature request" tag)
I've using the visualization command to study the effects of on_delete in one of our projects. I generate a simple graph filtering using my apps and then I color the edges in the graph using Gimp. Red is for CASCADE and yellow for PROTECTED. This allow to study deletion criteria for relations with just a quick look.
I tought that patching the mainstream project was worth it, and here I am.
Do you think it will be a good addition to the model graph command? I don't have time right now for preparing the PR but if someone think this will be useful I will try to find time in the future.
Ofc, is someone wants to do it it will be nice. A quick inspections shown that the model graph class is a good place to start. There is already a simple method a that class that prepares de json for the edges. I think extending the signature of that definition and adding the 'fillcolor' param there will be enough.