abstract class MG::Base

• MG::Base
• Reference
• Object

Overview

All user defined versions must inherite from this class, and implement the up and down methods.

class CreateUser < MG::Base
  def up : String
    <<-SQL
    CREATE TABLE users (
      username TEXT NOT NULL,
      password TEXT NOT NULL,
      email TEXT NOT NULL
    );
    CREATE UNIQUE INDEX user_idx ON users (username);
    SQL
  end

  def down : String
    <<-SQL
    DROP TABLE users;
    SQL
  end
end

Defined in:

mg/base.cr

Class Method Summary

• .versions : Array(Version)

  Lists all versions available.

Instance Method Summary

• #after_down(db : DB::Connection)

  Optional lifecycle method.

• #after_up(db : DB::Connection)

  Optional lifecycle method.

Class Method Detail

Instance Method Detail