Cookie overflow in rails application?

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You’ve got a 4kb limit on what you can store in a cookie, and when Rails converts your object into text for writing to the cookie its probably bigger than that limit.

Ruby on Rails ActionDispatch::Cookies::CookieOverflow error

That way this CookieOverflow Error occurs.

The easiest way to solve this one is, you need change your session_store and don’t use the cookie_store. You can use the active_record_store by example.

Here is the steps

  1. Generate a migration that creates the session table

    rake db:sessions:create

  2. Run the migration

    rake db:migrate

  3. Modify config/initializers/session_store.rb from

    (App)::Application.config.session_store :cookie_store, :key => 'xxx'

    to

    (App)::Application.config.session_store :active_record_store

Once you’ve done the three steps, restart your application. Rails will now use the sessions table to store session data,
and you won’t have the 4kb limit.

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