Changed __year lookup to use a BETWEEN SQL statement instead of compa…

…ring the result of EXTRACT(year). This should be more efficient.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@4505 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/db/models/fields/__init__.py

@@ -164,7 +164,7 @@ def get_db_prep_save(self, value):
 
     def get_db_prep_lookup(self, lookup_type, value):
         "Returns field's value prepared for database lookup."
-        if lookup_type in ('exact', 'gt', 'gte', 'lt', 'lte', 'year', 'month', 'day', 'search'):
+        if lookup_type in ('exact', 'gt', 'gte', 'lt', 'lte', 'month', 'day', 'search'):
             return [value]
         elif lookup_type in ('range', 'in'):
             return value
@@ -178,7 +178,13 @@ def get_db_prep_lookup(self, lookup_type, value):
             return ["%%%s" % prep_for_like_query(value)]
         elif lookup_type == 'isnull':
             return []
-        raise TypeError, "Field has invalid lookup: %s" % lookup_type
+        elif lookup_type == 'year':
+            try:
+                value = int(value)
+            except ValueError:
+                raise ValueError("The __year lookup type requires an integer argument")
+            return ['%s-01-01 00:00:00' % value, '%s-12-31 23:59:59.999999' % value]
+        raise TypeError("Field has invalid lookup: %s" % lookup_type)
 
     def has_default(self):
         "Returns a boolean of whether this field has a default value."

django/db/models/query.py

@@ -198,17 +198,17 @@ def count(self):
         counter = self._clone()
         counter._order_by = ()
         counter._select_related = False
-        
+
         offset = counter._offset
         limit = counter._limit
         counter._offset = None
         counter._limit = None
-        
+
         try:
             select, sql, params = counter._get_sql_clause()
         except EmptyResultSet:
             return 0
-            
+
         cursor = connection.cursor()
         if self._distinct:
             id_col = "%s.%s" % (backend.quote_name(self.model._meta.db_table),
@@ -553,7 +553,7 @@ def iterator(self):
         else: # Default to all fields.
             columns = [f.column for f in self.model._meta.fields]
             field_names = [f.attname for f in self.model._meta.fields]
-        
+
         select = ['%s.%s' % (backend.quote_name(self.model._meta.db_table), backend.quote_name(c)) for c in columns]
         cursor = connection.cursor()
         cursor.execute("SELECT " + (self._distinct and "DISTINCT " or "") + ",".join(select) + sql, params)
@@ -576,12 +576,12 @@ def iterator(self):
         if self._field.null:
             self._where.append('%s.%s IS NOT NULL' % \
                 (backend.quote_name(self.model._meta.db_table), backend.quote_name(self._field.column)))
-                
+
         try:
             select, sql, params = self._get_sql_clause()
         except EmptyResultSet:
             raise StopIteration
-        
+
         sql = 'SELECT %s %s GROUP BY 1 ORDER BY 1 %s' % \
             (backend.get_date_trunc_sql(self._kind, '%s.%s' % (backend.quote_name(self.model._meta.db_table),
             backend.quote_name(self._field.column))), sql, self._order)
@@ -598,15 +598,15 @@ def _clone(self, klass=None, **kwargs):
         c._kind = self._kind
         c._order = self._order
         return c
-    
+
 class EmptyQuerySet(QuerySet):
     def __init__(self, model=None):
         super(EmptyQuerySet, self).__init__(model)
         self._result_cache = []
-        
+
     def count(self):
         return 0
-        
+
     def delete(self):
         pass
 
@@ -708,9 +708,9 @@ def get_where_clause(lookup_type, table_prefix, field_name, value):
             return '%s%s IN (%s)' % (table_prefix, field_name, in_string)
         else:
             raise EmptyResultSet
-    elif lookup_type == 'range':
+    elif lookup_type in ('range', 'year'):
         return '%s%s BETWEEN %%s AND %%s' % (table_prefix, field_name)
-    elif lookup_type in ('year', 'month', 'day'):
+    elif lookup_type in ('month', 'day'):
         return "%s = %%s" % backend.get_date_extract_sql(lookup_type, table_prefix + field_name)
     elif lookup_type == 'isnull':
         return "%s%s IS %sNULL" % (table_prefix, field_name, (not value and 'NOT ' or ''))
@@ -791,7 +791,7 @@ def parse_lookup(kwarg_items, opts):
 
         if len(path) < 1:
             raise TypeError, "Cannot parse keyword query %r" % kwarg
-        
+
         if value is None:
             # Interpret '__exact=None' as the sql '= NULL'; otherwise, reject
             # all uses of None as a query value.
@@ -1007,7 +1007,7 @@ def delete_objects(seen_objs):
                         pk_list[offset:offset+GET_ITERATOR_CHUNK_SIZE])
         for f in cls._meta.many_to_many:
             if isinstance(f, GenericRelation):
-                from django.contrib.contenttypes.models import ContentType 
+                from django.contrib.contenttypes.models import ContentType
                 query_extra = 'AND %s=%%s' % f.rel.to._meta.get_field(f.content_type_field_name).column
                 args_extra = [ContentType.objects.get_for_model(cls).id]
             else:

tests/modeltests/basic/models.py

@@ -12,7 +12,7 @@ class Article(models.Model):
 
     class Meta:
         ordering = ('pub_date','headline')
-        
+
     def __str__(self):
         return self.headline
 
@@ -319,7 +319,6 @@ def __str__(self):
 >>> Article.objects.filter(id__lte=4).delete()
 >>> Article.objects.all()
 [<Article: Article 6>, <Article: Default headline>, <Article: Article 7>, <Article: Updated article 8>]
-
 """}
 
 from django.conf import settings
@@ -358,4 +357,11 @@ def __str__(self):
 >>> a10 = Article.objects.create(headline="Article 10", pub_date=datetime(2005, 7, 31, 12, 30, 45))
 >>> Article.objects.get(headline="Article 10")
 <Article: Article 10>
+
+# Edge-case test: A year lookup should retrieve all objects in the given
+year, including Jan. 1 and Dec. 31.
+>>> a11 = Article.objects.create(headline='Article 11', pub_date=datetime(2008, 1, 1))
+>>> a12 = Article.objects.create(headline='Article 12', pub_date=datetime(2008, 12, 31, 23, 59, 59, 999999))
+>>> Article.objects.filter(pub_date__year=2008)
+[<Article: Article 11>, <Article: Article 12>]
 """