Merge pull request #106 from uncovertruth/feature/queryset_as_mixin

QuerySet class as a mixin

Author: tsuyukimakoto

lookup_extensions/__init__.py

@@ -2,6 +2,6 @@
 
 __author__ = """UNCOVER TRUTH Inc."""
 __email__ = 'develop@uncovertruth.co.jp'
-__version__ = '0.1.0'
+__version__ = '0.1.1'
 
 default_app_config = 'lookup_extensions.apps.LookupExtensionsConfig'

lookup_extensions/sql.py

@@ -4,7 +4,7 @@
 from django.db.models.sql import Query as DjangoQuery
 
 
-class Query(DjangoQuery):
+class ExtendedQueryMixin(object):
     SUBQUERY_LOOKUPS = (
         'exists',
         'neexists',
@@ -14,18 +14,22 @@ def build_lookup(self, lookups, lhs, rhs):
         if lookups and lookups[-1] in self.SUBQUERY_LOOKUPS:
             if not isinstance(rhs, Exists):
                 raise FieldError("Value is not Subquery instance.")
-            return super(Query, self).build_lookup(['exact'], rhs, not lookups[-1].startswith('ne'))
-        return super(Query, self).build_lookup(lookups, lhs, rhs)
+            return super(ExtendedQueryMixin, self).build_lookup(['exact'], rhs, not lookups[-1].startswith('ne'))
+        return super(ExtendedQueryMixin, self).build_lookup(lookups, lhs, rhs)
 
     def prepare_lookup_value(self, value, lookups, can_reuse, allow_joins=True):
         if lookups and lookups[-1] in self.SUBQUERY_LOOKUPS:
             value = value.resolve_expression(self, allow_joins=True, reuse=None, summarize=False)
             return value, lookups, []
-        return super(Query, self).prepare_lookup_value(
+        return super(ExtendedQueryMixin, self).prepare_lookup_value(
             value, lookups, can_reuse, allow_joins=allow_joins)
 
     def solve_lookup_type(self, lookup):
         lookup_splitted = lookup.split(LOOKUP_SEP)
         if lookup_splitted and lookup_splitted[-1] in self.SUBQUERY_LOOKUPS:
             return lookup_splitted, (), True  # No JOIN
-        return super(Query, self).solve_lookup_type(lookup)
+        return super(ExtendedQueryMixin, self).solve_lookup_type(lookup)
+
+
+class Query(ExtendedQueryMixin, DjangoQuery):
+    pass