server/search: permit search for tags by alias

server/szurubooru/search/base_search_config.py

@@ -134,5 +134,5 @@ class BaseSearchConfig(object):
             subquery = subquery.options(sqlalchemy.orm.lazyload('*'))
             subquery = filter_func(subquery, criterion)
             subquery = subquery.subquery('t')
-            return query.filter(left_id_column == subquery.c.foreign_id)
+            return query.filter(left_id_column.in_(subquery))
         return func

server/szurubooru/search/tag_search_config.py

@@ -23,12 +23,20 @@ class TagSearchConfig(BaseSearchConfig):
 
     @property
     def anonymous_filter(self):
-        return self._create_str_filter(db.Tag.first_name)
+        return self._create_subquery_filter(
+            db.Tag.tag_id,
+            db.TagName.tag_id,
+            db.TagName.name,
+            self._create_str_filter)
 
     @property
     def named_filters(self):
         return util.unalias_dict({
-            'name': self._create_str_filter(db.Tag.first_name),
+            'name': self._create_subquery_filter(
+                db.Tag.tag_id,
+                db.TagName.tag_id,
+                db.TagName.name,
+                self._create_str_filter),
             'category': self._create_subquery_filter(
                 db.Tag.category_id,
                 db.TagCategory.tag_category_id,

server/szurubooru/tests/search/test_tag_search_config.py

@@ -47,6 +47,7 @@ def test_filter_anonymous(verify_unpaged, tag_factory, input, expected_tag_names
     ('name:tag1,tag2', ['tag1', 'tag2']),
     ('-name:tag1,tag3', ['tag2', 'tag4']),
     ('name:tag4', ['tag4']),
+    ('name:tag5', ['tag4']),
     ('name:tag4,tag5', ['tag4']),
 ])
 def test_filter_by_name(verify_unpaged, tag_factory, input, expected_tag_names):