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Rails Fix Undefined Local Variable or Method

How to fix rails undefined local variable or method ‘confirmed_at’ ?

If you getting like,

rails undefined

and you thinking how can I fix ?

  • Firstly, you need to create migration
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rails g migration add_confirmable

then,

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rake db:migrate

When you write above command, you get again error, like

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== 20140725114621 Addconfirmable: migrating ===================================
-- change_table(:admins)
rake aborted!
StandardError: An error has occurred, this and all later migrations canceled:
undefined method `confirmable' for #<ActiveRecord::ConnectionAdapters::Table:0x007f8739d3e2e0>..../db/migrate/20140725114621_addconfirmable.rb:4:in `block in up'
/Users/...../db/migrate/20140725114621_addconfirmable.rb:3:in `up'
Tasks: TOP => db:migrate
(See full trace by running task with --trace)

Let’s fix this bug,

  • You should open your migration which created and delete
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t.confirmable

then go to another migration named which

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..../devise_create ... .rb

in this file, you should see in comment

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  ## Confirmable
  ## t.string   :confirmation_token
  ## t.datetime :confirmed_at
  ## t.datetime :confirmation_sent_at
  ## t.string   :unconfirmed_email # Only if using reconfirmable

you should copy or cut above command without comment to your addconfirmable.rb migration file, instead of t.confirmable

Then you can write

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rake db:migrate

That’s all.

I hope fix your bug.

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