How should I represent a bit flags int field in django admin?

Question

I have a data model with a bitfield defined something like this:

alter table MemberFlags add column title varchar(50) not null default '';
alter table MemberFlags add column value integer( 3) not null default 0;

insert into MemberFlags (title, value) values
    ("Blacklisted",             1),
    ("Special Guest",           2),
    ("Attend Ad-hoc Sessions",  4),
    ("Attend VIP Sessions",     8),
    ("Access Facility A",      16),
    ("Access Facility B",      32)

And used like this:

alter table Membership add column title varchar(50) not null default '';
alter table Membership add column flags integer( 3) not null default 0;

insert into Membership (title, flags) values
    ("Guest Pass",          4+2 ),
    ("Silver Plan",    16+  4   ),
    ("Gold Plan",   32+16+  4+2 ),
    ("VIP Pass",    32+16+8+4+2 )

My questions are:

A) What's the easiest way to represent the different bitflags as separate items in the admin site? Should I override the template, or do something with forms?

B) How about the search list? I could create functions in the model to represent each bit, but how would searching and sorting be done?

I'm new to Django.

Answer 1

A great tested solution, even if it doesn't fit your model right away, would be using django-bitfield