#27429: had to use QuerySet.extra to do WHERE LIKE with arbitrary amount /
placement of wildcard characters
-------------------------------------+-------------------------------------
Reporter: Lance Robertson | Owner: nobody
Type: New feature | Status: closed
Component: Database layer | Version: master
(models, ORM) |
Severity: Normal | Resolution: duplicate
Keywords: QuerySet.extra | Triage Stage:
| Unreviewed
Has patch: 0 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
-------------------------------------+-------------------------------------
Changes (by Simon Charette):
* status: new => closed
* resolution: => duplicate
* version: 1.10 => master
* component: Uncategorized => Database layer (models, ORM)
* type: Uncategorized => New feature
Comment:
It was decided that we were not going to add `like` and `ilike` lookups in
#17473.
Now that [https://docs.djangoproject.com/en/1.10/howto/custom-lookups/
custom lookups are available] you can define your own `LIKE`
implementation as follow:
{{{#!python
from django.db.models import CharField, Lookup, TextField
class LikeLookup(Lookup):
lookup_name = 'like'
def as_sql(self, compiler, connection):
lhs, lhs_params = self.process_lhs(compiler, connection)
rhs, rhs_params = self.process_rhs(compiler, connection)
params = lhs_params + rhs_params
return '%s LIKE %s' % (lhs, rhs), params
CharField.register_lookup(LikeLookup)
TextField.register_lookup(LikeLookup)
}}}
And use like that
{{{#!python
Pronunciation.objects.filter(code__like='%% - %%__1 - S T __0 D')
}}}
--
Ticket URL: <https://code.djangoproject.com/ticket/27429#comment:2>
Django <https://code.djangoproject.com/>
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