Is it possible to add filter on an HABTM associated model's field ?

[Val]

I'm trying to override list view pretty_value on associated model to provide a quick link to associated model's list using filter to show only associated records.

It works well for has_many associations but not for HABTM ones.

To see it try this gist : https://gist.github.com/3810559

Author 1-N Book works
Book N-N Collection doesn't : if you try to add a book filter in collection list or a collection filter in book list there is no selector option ("contains", "is exactly", etc.)

Any tips or documentation pointer ?
Regards.

[bbenezech]

No, it's not possible at the moment.
Only belongs_to, sorry.

[Val]

Ok, thanks.

May be I could help you providing this feature.
Is it a client-side problem, a server side one or the both ? Do you have any plan for it or any pointer in sources ?

Regards.

[Val]

Could you try this hack : https://github.com/Val/rails_admin/commit/6cc8ac5d3f8ea0bf1eae1145f27851fccc50911b

It's working for me but I'm not sure to follow your code style... Hope it helps.

[Val]

Note: lines 42-44 of ra.filter-box.js were ended with a non-printable space character and I did remove them, that's why they appear on diff.

[Val]

@bbenezech : Did you take a look at the diff (https://github.com/Val/rails_admin/commit/6cc8ac5d3f8ea0bf1eae1145f27851fccc50911b) ?

[mshibuya]

Your work looks nice, but some more jobs still need to be done.

1. It comes with no tests.
2. Forcing include of has_and_belongs_to_many association may produce massive amount of DB access. Instead of it, we'll need some kind of a configuration option to control eager-loading of has_many/has_and_belongs_to_many association.

How's your opinion on them?

[Val]

@mshibuya : Thanks for taking time to review the patch.

I agree with you, it needs tests and lacks some kind of configuration option and perhaps a better rails_admin DSL inclusion too.

I'll try to refactor my code.

[barsukov]

I need same functionality for has_many :thorugh association may be it is possible to implement it too ? and i did not find any filter code for simple has_many association (without through) , I can try to implement it I think you code can help me. :)