admin.InlineModelAdmin.get_max_num()

InlineModelAdmin.get_max_num(request, obj=None, **kwargs)

Returns the maximum number of extra inline forms to use. By default, returns the InlineModelAdmin.max_num attribute.

Override this method to programmatically determine the maximum number of inline forms. For example, this may be based on the model instance (passed as the keyword argument obj):

class BinaryTreeAdmin(admin.TabularInline):
    model = BinaryTree

    def get_max_num(self, request, obj=None, **kwargs):
        max_num = 10
        if obj.parent:
            return max_num - 5
        return max_num