Rails Executing migration ArgumentError

Question

I\'m having a strange problem executing rake db:migrate

== 20141127213559 CreateMovies: migrating =====================================
-- create_table(:movies)         


        

Answer 1

Maybe you should execute this after create movies table:

generate migration AddFieldsToMovies newfield:type

This generates the correct migration, see this:

http://edgeguides.rubyonrails.org/active_record_migrations.html#changing-tables

Answer 2

If you are using Rails 4.2.0.beta4, ActiveRecord will require arel gem. Add the following to your gem file

gem 'arel', '6.0.0.beta2'

and run

bundle install

You may get below error message

You have requested:arel = 6.0.0.beta2

The bundle currently has arel locked at 6.0.0.
Try running `bundle update arel`

then

bundle update arel

Now you should able to run migration.

Here you may find similar and explanatory answer: Can't migrate database after scaffold. Section 2.2 Ruby on Rails Tutorial Michael Hartl