How can I customize Pundit policies in a Rails application?

How can I customize Pundit policies in a Rails application?

You can customize Pundit policies by creating a policy class for each model and defining methods for each action.

Can you give me an example of a policy class?

Sure! Here's a simple example:

class PostPolicy < ApplicationPolicy
  def update?
    user.admin? || record.user_id == user.id
  end
end

How do I apply this policy in my controller?

In your controller, you can use the authorize method like this:

def update
  @post = Post.find(params[:id])
  authorize @post
  # update logic here
end

What if I want to customize the error message?

You can customize the error message by overriding the authorize method in your ApplicationController and adding a custom message.