server/model/posts: Make post flags a hybrid attribute in model

This should (hopefully) fix #250 and #252

server/szurubooru/func/posts.py

@@ -222,7 +222,7 @@ class PostSerializer(serialization.BaseSerializer):
         return get_post_thumbnail_url(self.post)
 
     def serialize_flags(self) -> Any:
-        return [x for x in self.post.flags.split(',') if x]
+        return self.post.flags
 
     def serialize_tags(self) -> Any:
         return [
@@ -356,7 +356,7 @@ def create_post(
     post.safety = model.Post.SAFETY_SAFE
     post.user = user
     post.creation_time = datetime.utcnow()
-    post.flags = ''
+    post.flags = []
 
     post.type = ''
     post.checksum = ''
@@ -477,7 +477,7 @@ def test_sound(post: model.Post, content: bytes) -> None:
     assert content
     if mime.is_video(mime.get_mime_type(content)):
         if images.Image(content).check_for_sound():
-            flags = [x for x in post.flags.split(',') if x]
+            flags = post.flags
             if model.Post.FLAG_SOUND not in flags:
                 flags.append(model.Post.FLAG_SOUND)
             update_post_flags(post, flags)
@@ -637,7 +637,7 @@ def update_post_flags(post: model.Post, flags: List[str]) -> None:
             raise InvalidPostFlagError(
                 'Flag must be one of %r.' % list(FLAG_MAP.values()))
         target_flags.append(flag)
-    post.flags = ','.join(target_flags)
+    post.flags = target_flags
 
 
 def feature_post(post: model.Post, user: Optional[model.User]) -> None:

server/szurubooru/func/snapshots.py

@@ -29,7 +29,7 @@ def get_post_snapshot(post: model.Post) -> Dict[str, Any]:
         'source': post.source,
         'safety': post.safety,
         'checksum': post.checksum,
-        'flags': sorted(post.flags.split(',')),
+        'flags': post.flags,
         'featured': post.is_featured,
         'tags': sorted([tag.first_name for tag in post.tags]),
         'relations': sorted([rel.post_id for rel in post.relations]),

server/szurubooru/model/post.py

@@ -1,6 +1,8 @@
+from typing import List
 import sqlalchemy as sa
 from szurubooru.model.base import Base
 from szurubooru.model.comment import Comment
+from sqlalchemy.ext.hybrid import hybrid_property
 
 
 class PostFeature(Base):
@@ -169,7 +171,7 @@ class Post(Base):
     last_edit_time = sa.Column('last_edit_time', sa.DateTime)
     safety = sa.Column('safety', sa.Unicode(32), nullable=False)
     source = sa.Column('source', sa.Unicode(200))
-    flags = sa.Column('flags', sa.Unicode(200), default='')
+    flags_string = sa.Column('flags', sa.Unicode(200), default='')
 
     # content description
     type = sa.Column('type', sa.Unicode(32), nullable=False)
@@ -219,6 +221,14 @@ class Post(Base):
             .first())
         return featured_post and featured_post.post_id == self.post_id
 
+    @hybrid_property
+    def flags(self) -> List[str]:
+        return sorted([x for x in self.flags_string.split(',') if x])
+
+    @flags.setter
+    def flags(self, data: List[str]) -> None:
+        self.flags_string = ','.join([x for x in data if x])
+
     score = sa.orm.column_property(
         sa.sql.expression.select(
             [sa.sql.expression.func.coalesce(

server/szurubooru/search/configs/post_search_config.py

@@ -348,7 +348,7 @@ class PostSearchConfig(BaseSearchConfig):
             (
                 ['flag'],
                 search_util.create_str_filter(
-                    model.Post.flags, _flag_transformer)
+                    model.Post.flags_string, _flag_transformer)
             ),
         ])