Prevent delete in Django model

Question

I have a setup like this (simplified for this question):

class Employee(models.Model):
    name = models.CharField(name, unique=True)

class Project(models.M         


        

Answer 1

I have a suggestion but I'm not sure it is any better than your current idea. Taking a look at the answer here for a distant but not unrelated problem, you can override in the django admin various actions by essentially deleting them and using your own. So, for example, where they have:

def really_delete_selected(self, request, queryset):
    deleted = 0
    notdeleted = 0
    for obj in queryset:
        if obj.project_set.all().count() > 0:
            # set status to fail
            notdeleted = notdeleted + 1
            pass
        else:
            obj.delete()
            deleted = deleted + 1
    # ...

If you're not using django admin like myself, then simply build that check into your UI logic before you allow the user to delete the object.