I have a function field which is defined like this:

def _get_field_value(self, cr, uid, ids, field_name, args, context=None):
    return ...

def _get_related_others(self, cr, uid, other_ids, context=None):
    return self.pool.get('this.model').search(cr, uid,
                         [('other_id','in',other_ids)], context=None)

'field': fields.function(_get_field_value, ...,
    store={'other.model': (_get_related_others, ['other_field'], 10)}),

The idea is that when the user creates a new resource in the other.model an update of 'field' is triggered. The update is triggered without any problems, but the _get_related_others can't retrieve the given other_ids from other.model. It gets passed a list containing one id (of a new other.model resource), but self.pool.get('other.model').search() returns no IDs.

I can see that the newly created other.model resource is not in the database at the time that _get_related_others is called, but isn't this just because it's in a transaction that's yet to be committed? And shouldn't the self.pool.get('other.model').search() call be working with the same transaction? And therefore have access to he newly created other.model resource?

Otherwise, please explain how/whether this is possible.

EDIT

Apologies, I abstracted my actual problem incorrectly. I'm aware that the aim is to return a list of IDs on this.model that need to be updated, but the problem is that I want to select resources from this.model which are related to the resource(s) on other.model that changed.

this.model has a field, 'other_id', that points to other.model. In my _get_related_others method I intend to select all the this.model resources where other_id is in the list of other_ids that changed. However, I find that:

self.search(cr, uid, [('other_id','in',other_ids)], context=None)

is wrong because self is actually a other.model object (I expected it to be this.model). And

self.pool.get('this.model').search(cr, uid, [('other_id','in',other_ids)], context=None)

(as I've edited to above to now read) doesn't work as it returns an empty list. It should be returning resources on this.model whose other_id field points to the newly created resource on other.model.

I hope that's a bit clearer?