Check if related model has an integer as pk for ManyToMany fields.

[logaritmisk]

I have a model (Station) that uses UUID as pk, and it has an ManyToMany relation to a model (Entity) that uses integers as pk. With current implementation I get an exception because Station.has_int_pk() returns False (as it should), so ids is None when we call get_many_to_something(). It should check if the related model has integers as pk, because it's the related model ids when want in our query.

I guess there should be an else statement where ids is set to self.value, if the related model uses string as pk?

[coveralls]

Coverage remained the same at 78.648% when pulling d4b9b17 on logaritmisk:master into fe24dbc on jedie:master.

[jedie]

Thanks for contribution!

Can you also contribute a test with UUID?

[logaritmisk]

I'm doing this for a client, so not much time over to other things. But I will give it a try and see if I can get something working after work

[jedie]

i uploaded release v0.6.2 that contains this pull ;)