model: add a number of missing indexes

See #107.

[MIGRATION] This commit contains a new version of the schema.

app/models/attachment.py

@@ -13,7 +13,8 @@ class Attachment(db.Model):
     name = db.Column(db.Unicode(64))
 
     # The comment linked with
-    comment_id = db.Column(db.Integer, db.ForeignKey('comment.id'), nullable=False)
+    comment_id = db.Column(db.Integer, db.ForeignKey('comment.id'),
+        nullable=False, index=True)
     comment = db.relationship('Comment', backref=backref('attachments'))
 
     # The size of the file

app/models/notification.py

@@ -11,7 +11,8 @@ class Notification(db.Model):
     href = db.Column(db.UnicodeText)
     date = db.Column(db.DateTime, default=datetime.now())
 
-    owner_id = db.Column(db.Integer, db.ForeignKey('member.id'),nullable=False)
+    owner_id = db.Column(db.Integer, db.ForeignKey('member.id'),
+        nullable=False, index=True)
     owner = db.relationship('Member', backref='notifications',
         foreign_keys=owner_id)
 

app/models/poll.py

@@ -103,7 +103,7 @@ class PollAnswer(db.Model):
     id = db.Column(db.Integer, primary_key=True)
 
     # Poll
-    poll_id = db.Column(db.Integer, db.ForeignKey('poll.id'))
+    poll_id = db.Column(db.Integer, db.ForeignKey('poll.id'), index=True)
     poll = db.relationship('Poll', backref=backref('answers'),
         foreign_keys=poll_id)
 

app/models/post.py

@@ -14,10 +14,11 @@ class Post(db.Model):
 
     # Creation and edition date
     date_created = db.Column(db.DateTime)
-    date_modified = db.Column(db.DateTime)
+    date_modified = db.Column(db.DateTime, index=True)
 
     # Post author
-    author_id = db.Column(db.Integer, db.ForeignKey('user.id'), nullable=False)
+    author_id = db.Column(db.Integer, db.ForeignKey('user.id'), nullable=False,
+        index=True)
     author = db.relationship('User', backref="posts", foreign_keys=author_id)
 
     __mapper_args__ = {

app/models/topic.py

@@ -23,7 +23,8 @@ class Topic(Post):
     title = db.Column(db.Unicode(128))
 
     # Parent forum
-    forum_id = db.Column(db.Integer, db.ForeignKey('forum.id'), nullable=False)
+    forum_id = db.Column(db.Integer, db.ForeignKey('forum.id'), nullable=False,
+        index=True)
     forum = db.relationship('Forum',
         backref=backref('topics', lazy='dynamic'), foreign_keys=forum_id)
 

app/models/trophy.py

@@ -59,4 +59,4 @@ class Title(Trophy):
 # Many-to-many relation for users earning trophies
 TrophyMember = db.Table('trophy_member', db.Model.metadata,
     db.Column('tid', db.Integer, db.ForeignKey('trophy.id')),
-    db.Column('uid', db.Integer, db.ForeignKey('member.id')))
+    db.Column('uid', db.Integer, db.ForeignKey('member.id'), index=True))

migrations/versions/bcfdb271b88d_add_a_number_of_missing_indexes.py

@@ -0,0 +1,40 @@
+"""Add a number of missing indexes
+
+Revision ID: bcfdb271b88d
+Revises: adcd1577f301
+Create Date: 2022-04-21 17:45:09.787769
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = 'bcfdb271b88d'
+down_revision = 'adcd1577f301'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.create_index(op.f('ix_attachment_comment_id'), 'attachment', ['comment_id'], unique=False)
+    op.create_index(op.f('ix_notification_owner_id'), 'notification', ['owner_id'], unique=False)
+    op.create_index(op.f('ix_pollanswer_poll_id'), 'pollanswer', ['poll_id'], unique=False)
+    op.create_index(op.f('ix_post_author_id'), 'post', ['author_id'], unique=False)
+    op.create_index(op.f('ix_post_date_modified'), 'post', ['date_modified'], unique=False)
+    op.create_index(op.f('ix_topic_forum_id'), 'topic', ['forum_id'], unique=False)
+    op.create_index(op.f('ix_trophy_member_uid'), 'trophy_member', ['uid'], unique=False)
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_index(op.f('ix_trophy_member_uid'), table_name='trophy_member')
+    op.drop_index(op.f('ix_topic_forum_id'), table_name='topic')
+    op.drop_index(op.f('ix_post_date_modified'), table_name='post')
+    op.drop_index(op.f('ix_post_author_id'), table_name='post')
+    op.drop_index(op.f('ix_pollanswer_poll_id'), table_name='pollanswer')
+    op.drop_index(op.f('ix_notification_owner_id'), table_name='notification')
+    op.drop_index(op.f('ix_attachment_comment_id'), table_name='attachment')
+    # ### end Alembic commands ###