Changed _defer_fields and _only_fields in CQLEngine so they store the name of the fields in the DB
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@ -355,9 +355,15 @@ class AbstractQuerySet(object):
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# because explicit is better than implicit
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self._limit = 10000
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# see the defer and only methods
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# We store the fields for which we use the Equal operator
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# in a query, so we don't select it from the DB. _defer_fields
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# will contain the names of the fields in the DB, not the names
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# of the variables used by the mapper
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self._defer_fields = set()
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self._deferred_values = {}
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# This variable will hold the names in the database of the fields
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# for which we want to query
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self._only_fields = []
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self._values_list = False
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@ -719,7 +725,7 @@ class AbstractQuerySet(object):
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else:
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query_val = column.to_database(val)
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if not col_op: # only equal values should be deferred
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clone._defer_fields.add(col_name)
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clone._defer_fields.add(column.db_field_name)
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clone._deferred_values[column.db_field_name] = val # map by db field name for substitution in results
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clone._where.append(WhereClause(column.db_field_name, operator, query_val, quote_field=quote_field))
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@ -941,6 +947,8 @@ class AbstractQuerySet(object):
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"Can't resolve fields {0} in {1}".format(
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', '.join(missing_fields), self.model.__name__))
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fields = [self.model._columns[field].db_field_name for field in fields]
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if action == 'defer':
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clone._defer_fields.update(fields)
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elif action == 'only':
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@ -1068,18 +1076,18 @@ class ModelQuerySet(AbstractQuerySet):
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def _select_fields(self):
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if self._defer_fields or self._only_fields:
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fields = self.model._columns.keys()
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fields = [columns.db_field_name for columns in self.model._columns.values()]
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if self._defer_fields:
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fields = [f for f in fields if f not in self._defer_fields]
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# select the partition keys if all model fields are set defer
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if not fields:
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fields = self.model._partition_keys
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fields = [columns.db_field_name for columns in self.model._partition_keys.values()]
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if self._only_fields:
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fields = [f for f in fields if f in self._only_fields]
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if not fields:
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raise QueryException('No fields in select query. Only fields: "{0}", defer fields: "{1}"'.format(
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','.join(self._only_fields), ','.join(self._defer_fields)))
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return [self.model._columns[f].db_field_name for f in fields]
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return fields
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return super(ModelQuerySet, self)._select_fields()
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def _get_result_constructor(self):
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@ -1281,6 +1281,15 @@ class TestModelQueryWithDBField(BaseCassEngTestCase):
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for value in values:
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self.assertTrue(value not in str(b2.queries[0]))
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def test_db_field_value_list(self):
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DBFieldModel.create(k0=0, k1=0, c0=0, v0=4, v1=5)
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self.assertEqual(DBFieldModel.objects.filter(c0=0, k0=0, k1=0).values_list('c0', 'v0')._defer_fields,
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{'a', 'c', 'b'})
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self.assertEqual(DBFieldModel.objects.filter(c0=0, k0=0, k1=0).values_list('c0', 'v0')._only_fields,
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['c', 'd'])
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list(DBFieldModel.objects.filter(c0=0, k0=0, k1=0).values_list('c0', 'v0'))
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class TestModelSmall(Model):
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