comic upload optimization

app.py

@@ -677,14 +677,13 @@ async def upload_video():
 
 @app.route('/comic_upload', methods=['GET', 'POST'])
 @login_required
-def comic_upload():
+async def comic_upload():
     if request.method == 'POST':
-
         ct = request.files['thumbnail']
         n = request.form['title']
         tags = request.form.get('tags', '')
 
-        if Comic.query.filter_by(name=n).first():
+        if db.session.execute(db.select(Comic).filter_by(name=n)).scalar():
             return render_template('comic_upload.html')
 
         if ct:
@@ -703,16 +702,22 @@ def comic_upload():
                 tags=tags
             )
             db.session.add(new_comic)
+            try:
                 db.session.commit()
+            except IntegrityError:
+                db.session.rollback()
+                return render_template('comic_upload.html')
 
+            async def save_pages():
                 for p in request.files.getlist('pages[]'):
                     if p:
-                    p.save(os.path.join(cf, secure_filename(p.filename)))
+                        async with aiofiles.open(os.path.join(cf, secure_filename(p.filename)), 'wb') as f:
+                            await f.write(p.read())
+            
+            await save_pages()
 
             return redirect(url_for('comics'))
 
-    return render_template('comic_upload.html')
-
 @app.route('/user_pubs/<pub_type>/<username>')
 def user_pubs(pub_type, username):
     p = request.args.get('page', 1, type=int)
@@ -886,7 +891,7 @@ def delete(content_type, content_id):
 @app.route('/delete_comment/<int:comment_id>', methods=['POST'])
 @login_required
 def delete_comment(comment_id):
-    comment = Comments.query.get_or_404(comment_id)
+    comment = db.session.get(Comments, comment_id) or abort(404)
 
     if comment.image_id:
         content_type = 'art'
@@ -900,7 +905,6 @@ def delete_comment(comment_id):
 
     if comment.username == current_user.username:
         try:
-
             if hasattr(comment, 'post_id') and comment.post_id:
                 post_id = comment.post_id
                 db.session.delete(comment)
@@ -910,10 +914,8 @@ def delete_comment(comment_id):
             db.session.delete(comment)
             db.session.commit()
             return redirect(url_for('view', content_type=content_type, id=content_id))
-
         except IntegrityError:
             db.session.rollback()
-
             return redirect(url_for('view', content_type=content_type, id=content_id))
 
     return redirect(request.referrer or url_for('index'))