class ActiveRecord::Migration
Public Instance Methods
copy(destination, sources, options = {})
click to toggle source
# File config/initializers/extensions/rails/activerecord/lib/active_record/migration.rb, line 31 def copy(destination, sources, options = {}) copied = [] FileUtils.mkdir_p(destination) unless File.exist?(destination) destination_migrations = ActiveRecord::Migrator.migrations(destination) last = destination_migrations.last sources.each do |scope, path| source_migrations = ActiveRecord::Migrator.migrations(path) source_migrations.each do |migration| source = File.binread(migration.filename) inserted_comment = "# This migration comes from #{scope} (originally #{migration.version})\n" if /\A#.*\b(?:en)?coding:\s*\S+/ =~ source # If we have a magic comment in the original migration, # insert our comment after the first newline(end of the magic comment line) # so the magic keep working. # Note that magic comments must be at the first line(except sh-bang). source[/\n/] = "\n#{inserted_comment}" else source = "#{inserted_comment}#{source}" end if duplicate = destination_migrations.detect { |m| m.name == migration.name } if options[:on_skip] && duplicate.scope != scope.to_s options[:on_skip].call(scope, migration) end next end migration.version = next_migration_number(last ? last.version + 1 : 0).to_i new_path = File.join(destination, "#{migration.version}_#{migration.name.underscore}.rb") old_path, migration.filename = migration.filename, new_path last = migration File.binwrite(migration.filename, source) copied << migration options[:on_copy].call(scope, migration, old_path) if options[:on_copy] destination_migrations << migration end end copied end