Hi Jorgue, As you already know there's no officially supported API to create custom lookups in Django < 1.7
However it's possible to get something working by monkey patching WhereNode.make_atom. Here's an example GIST <https://gist.github.com/charettes/2c2db0c0c96afab3297a> that expose a decent API to add custom lookups. >From importing the lookups module you should be able to register your custom lookup this way: def db_prepare_customcomparison(value, connection, prepared): return [value.replace(' ', '').lower()] lookups.register( 'customcomparison', 'replace(lower(%s), " ", "") = %%s', db_prepare=db_prepare_customcomparison, ) Note that you should use this code at your own risk since it's messing with Django's internal and I would strongly advise you to move to 1.7 instead since 1.6 is approaching end of support. Simon Le mercredi 4 mars 2015 14:15:32 UTC-5, Jorge Arévalo a écrit : > > Hello, > > I'm trying to emulate a non-spaces-all-lower text comparison filter in > Django 1.6.x. In other words, I want the equivalent to this query > > select * from myapp_mymodel where replace(lower(str), " ", "") = > '<user_entry>' > Being my model something like this > > from django.db import models > class MyModel(models.Model): > num = models.IntegerField() > str = models.CharField(max_length=16) > > > In my mind, this can be implemented with a custom lookup like this: > > MyModel.objects.filter(str__customcomparison='spaces and UPPERCASE will > not be taken into account') > > I know Django 1.7 allows custom lookups creation, but can't make Django > 1.6 work like this. I've tried implementing a custom QuerySet and a custom > Manager for MyModel. In the custom QuerySet, I override the method > _filter_or_exclude. > > Am I in the right path? Any suggestion? > > Many thanks in advance > -- You received this message because you are subscribed to the Google Groups "Django users" group. To unsubscribe from this group and stop receiving emails from it, send an email to django-users+unsubscr...@googlegroups.com. To post to this group, send email to django-users@googlegroups.com. Visit this group at http://groups.google.com/group/django-users. To view this discussion on the web visit https://groups.google.com/d/msgid/django-users/931f930b-01c2-48c7-a760-63cb51052781%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
