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

Did not have luck with the solutions above (My env: Rails 3.0.20, MySQL 5.7.13, Ruby 1.9.3p551). Was able to get around it by overwriting the ActiveRecord::ConnectionAdapters::ColumnDefinition class. See below:

class ActiveRecord::ConnectionAdapters::ColumnDefinition
  def sql_type
    type.to_sym == :primary_key ? 'int(11) auto_increment PRIMARY KEY' : base.type_to_sql(type.to_sym, limit, precision, scale) rescue type
  end 
end

Stored this in config/initializers/column_definition.rb