Cool django admin tricks

1 ) Disable Add button in django admin interface for some models if they are having data in that table .


Answer :
Add below function in admin.py file in your respective class .

def has_add_permission(self,request):
        count = Data.objects.all().count()
        if count > 0:
            return False
        else:
            return True

2 ) disable delete operation for some models in django admin interface.

def has_delete_permission(self, request, obj=None):
        return False

3 ) Add link in django admin Interface .

list_display = ['my_url_field']   
    def my_url_field(self, obj):
        return '<a href="%s%s">%s</a>' % ('', obj.id, 'Click Here')
    my_url_field.allow_tags = True
    my_url_field.short_description = 'Data'