implementing Concurrent Database Updates in Ruby on Rails 7.1 Using Optimistic Locking
I've hit a wall trying to I've searched everywhere and can't find a clear answer. I'm working with a question with concurrent updates to the same record in my Rails 7.1 application. I have implemented optimistic locking by adding a `lock_version` column to my `Post` model. However, when two users try to update the same post at the same time, I'm seeing unexpected behavior. For example, if user A and user B both fetch the same post, make a change, and then try to save, user B's update seems to overwrite user A's change without raising a `ActiveRecord::StaleObjectError`. Here’s the relevant model code: ```ruby class Post < ApplicationRecord # Using optimistic locking validates :title, presence: true end ``` And this is how I'm handling the update in the controller: ```ruby class PostsController < ApplicationController def update @post = Post.find(params[:id]) if @post.update(post_params) redirect_to @post, notice: 'Post was successfully updated.' else render :edit end rescue ActiveRecord::StaleObjectError flash[:alert] = 'The post has been modified by another user. Please reload and try again.' redirect_to edit_post_path(@post) end private def post_params params.require(:post).permit(:title, :content) end end ``` I've confirmed that the `lock_version` column is being updated correctly in the database. However, it appears that the behavior handling block is never triggered. Any suggestions on how to properly implement this so that users receive a notification when someone else has updated the post prior to their save attempt? Also, are there any best practices I should consider for handling such scenarios in a Rails application? Am I missing something obvious? How would you solve this?