redirect on post delete if target post cant be found

app/routes/posts.py

@@ -48,6 +48,9 @@ def update_post(post_id, new_content, markup_language='babycode'):
 @login_required
 def delete(post_id):
     post = Posts.find({'id': post_id})
+    if not post:
+        return redirect(url_for('topics.all_topics'))
+
     thread = Threads.find({'id': post.thread_id})
     user = get_active_user()
     if not user:
@@ -76,6 +79,10 @@ def delete(post_id):
 @bp.get("/<post_id>/edit")
 @login_required
 def edit(post_id):
+    post = Posts.find({'id': post_id})
+    if not post:
+        return redirect(url_for('topics.all_topics'))
+
     user = get_active_user()
     q = f"{Posts.FULL_POSTS_QUERY} WHERE posts.id = ?"
     editing_post = db.fetch_one(q, post_id)
@@ -106,6 +113,8 @@ def edit(post_id):
 def edit_form(post_id):
     user = get_active_user()
     post = Posts.find({'id': post_id})
+    if not post:
+        return redirect(url_for('topics.all_topics'))
     if post.user_id != user.id:
         return redirect(url_for('topics.all_topics'))