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 with the mysql as per my previous question Here. (check Kalelc's approved answer for my recourse)
upon running
rake db:migrate
I get the following error
== CreateUsers: migrating ====================================================
-- create_table(:users)
rake aborted!
StandardError: An error has occurred, all later migrations canceled:
Mysql2::Error: All parts of a PRIMARY KEY must be NOT NULL; if you need NULL in a key, use UNIQUE instead: CREATE TABLE `users` (`id` int(11) DEFAULT NULL auto_increment PRIMARY KEY, `first_name` varchar(25), `last_name` varchar(50), `email` varchar(255) DEFAULT '' NOT NULL, `password` varchar(40), `created_at` datetime, `updated_at` datetime) ENGINE=InnoDBC:/Users/Lizanne/Documents/Code/Sites/simple_cms/db/migrate/20151116154434_create_users.rb:3:in `up'
C:in `migrate'
ActiveRecord::StatementInvalid: Mysql2::Error: All parts of a PRIMARY KEY must be NOT NULL; if you need NULL in a key, use UNIQUE instead: CREATE TABLE `users` (`id` int(11) DEFAULT NULL auto_increment PRIMARY KEY, `first_name` varchar(25), `last_name` varchar(50), `email` varchar(255) DEFAULT '' NOT NULL, `password` varchar(40), `created_at` datetime, `updated_at` datetime) ENGINE=InnoDB
C:/Users/Lizanne/Documents/Code/Sites/simple_cms/db/migrate/20151116154434_create_users.rb:3:in `up'
C:in `migrate'
Mysql2::Error: All parts of a PRIMARY KEY must be NOT NULL; if you need NULL in a key, use UNIQUE instead
C:/Users/Lizanne/Documents/Code/Sites/simple_cms/db/migrate/20151116154434_create_users.rb:3:in `up'
C:in `migrate'
Tasks: TOP => db:migrate
(See full trace by running task with --trace)
I do not set any values to NULL in my code, here is the code
Class CreateUsers < ActiveRecord::Migration
def up
create_table :users do |t|
t.column "first_name", :string, :limit => 25
t.string "last_name", :limit => 50
t.string "email", :default => "", :null => false
t.string "password", :limit => 40
t.timestamps
end
end
def down
drop_table :users
end
end
This code is exactly as shown in the tutorials I am following. I have also investigated other similar issues here on stack overflow and have followed the advice given. I have tried the monkey patch as suggested
# lib/patches/abastract_mysql_adapter.rb
class ActiveRecord::ConnectionAdapters::AbstractMysqlAdapter
NATIVE_DATABASE_TYPES[:primary_key] = "int(11) auto_increment PRIMARY KEY"
end
I inserted this file into a folder I have created called patches inside the lib of my simple_cms application. I have saved down the file as "abstract_mysql_adapter.rb" as suggested in the same monkey patch. I have updated my environment.rb of the simple_cms application with the following
require File.expand_path('../../lib/patches/abstract_mysql_adapter.rb', __FILE__)
if I then run a rake db:migrate command
rake aborted!
LoadError: cannot load such file -- C:/Users/Lizanne/Documents/Code/Sites/simple_cms/lib/patches/abstract_mysql_adapter.rb
C:/Users/Lizanne/Documents/Code/Sites/simple_cms/config/environment.rb:3:in `<top (required)>'
Tasks: TOP => db:migrate => environment
(See full trace by running task with --trace)
C:/Users/Lizanne/Documents/Code/Sites/simple_cms/lib/patches/abstract_mysql_adapter.rb is most definitely the path to the monkey patch. Have I put the patch in the wrong place? What am I doing wrong here, scratching my head over this one? Apologies if this is obvious to some but I'm returning to coding after a very long abstinence and I cant get my head around the issue. Many thanks in advance for you help :)
I too recently faced same issue.
MySQL 5.7 no longer supports null default values for the primary key.
By overriding the Native default for primary keys in MySql you can resolve your issue.
In config/initializers/abstract_mysql_adapter.rb:
class ActiveRecord::ConnectionAdapters::MysqlAdapter
NATIVE_DATABASE_TYPES[:primary_key] = "int(11) auto_increment PRIMARY KEY"
end
For mysql2 it should be config/initializers/abstract_mysql2_adapter.rb:
class ActiveRecord::ConnectionAdapters::Mysql2Adapter
NATIVE_DATABASE_TYPES[:primary_key] = "int(11) auto_increment PRIMARY KEY"
end