PRIMARY KEY issue with creating tables in Rails using rake db:migrate command with mysql

Question

My version of rails is 4.0.0, my version of mysql is Ver 14.14 Distrib 5.7.9, for Win64 (x86_64). I am operating of an older version of rails as I was getting some clashes w

Answer 1

I had this problem too (mysql 5.7.17 and Rails 4.0.0). I fixed it by adding a file config/initializers/mysql2_adapter.rb

require 'active_record/connection_adapters/mysql2_adapter'
class ActiveRecord::ConnectionAdapters::Mysql2Adapter
  NATIVE_DATABASE_TYPES[:primary_key] = "int(11) auto_increment PRIMARY KEY"
end

and then, in my environment.rb file:

require File.expand_path('../initializers/mysql2_adapter', __FILE__)