Class: ActiveRecord::Migration

Inherits:
Object
  • Object
show all
Defined in:
lib/migration_fu.rb

Constant Summary collapse

MAX_KEY_LENGTH = 
64
OPTION_KEYS = 
[:restrict, :set_null, :cascade, :no_action]
OPTION_VALUES = 
[:on_update, :on_delete]

Class Method Summary collapse

Class Method Details

.add_foreign_key(from_table, to_table, options = {}) ⇒ Object 



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# File 'lib/migration_fu.rb', line 11

def add_foreign_key(from_table, to_table, options = {})
  process(from_table, to_table, options) do |ft, tt, id, fk|
    execute "ALTER TABLE #{ft} ADD CONSTRAINT #{id} FOREIGN KEY(#{fk}) REFERENCES #{tt}(id)" << conditions(options)
  end
end

.entirely_reset_column_information ⇒ Object 



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# File 'lib/migration_fu.rb', line 23

def entirely_reset_column_information
  ActiveRecord::Base.send(:subclasses).each(&:reset_column_information)
end

.remove_foreign_key(from_table, to_table, options = {}) ⇒ Object 



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# File 'lib/migration_fu.rb', line 17

def remove_foreign_key(from_table, to_table, options = {})
  process(from_table, to_table, options) do |ft, tt, id|
    execute "ALTER TABLE #{ft} DROP FOREIGN KEY #{id}, DROP KEY #{id}"
  end
end