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14 changes: 9 additions & 5 deletions queryset_transform/__init__.py
Original file line number Diff line number Diff line change
@@ -1,12 +1,12 @@
from django.db import models

class TransformQuerySet(models.query.QuerySet):
class TransformQuerySetMixin(object):
def __init__(self, *args, **kwargs):
super(TransformQuerySet, self).__init__(*args, **kwargs)
super(TransformQuerySetMixin, self).__init__(*args, **kwargs)
self._transform_fns = []

def _clone(self, klass=None, setup=False, **kw):
c = super(TransformQuerySet, self)._clone(klass, setup, **kw)
c = super(TransformQuerySetMixin, self)._clone(klass, setup, **kw)
c._transform_fns = self._transform_fns[:]
return c

Expand All @@ -16,15 +16,19 @@ def transform(self, fn):
return c

def iterator(self):
result_iter = super(TransformQuerySet, self).iterator()
result_iter = super(TransformQuerySetMixin, self).iterator()
if self._transform_fns:
results = list(result_iter)
for fn in self._transform_fns:
fn(results)
return iter(results)
return result_iter

class TransformManager(models.Manager):

class TransformQuerySet(TransformQuerySetMixin, models.query.QuerySet):
pass


class TransformManager(models.Manager):
def get_query_set(self):
return TransformQuerySet(self.model)
13 changes: 13 additions & 0 deletions queryset_transform/geo.py
Original file line number Diff line number Diff line change
@@ -0,0 +1,13 @@
from django.contrib.gis.db.models.manager import GeoManager
from django.contrib.gis.db.models.query import GeoQuerySet

from . import TransformQuerySetMixin


class GeoTransformQuerySet(TransformQuerySetMixin, GeoQuerySet):
pass


class GeoTransformManager(GeoManager):
def get_query_set(self):
return GeoTransformQuerySet(self.model)