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module ActiveRecord
class Migration
module Compatibility # :nodoc: all
def self.find(version)
version = version.to_s
name = "V#{version.tr('.', '_')}"
unless const_defined?(name)
versions = constants.grep(/\AV[0-9_]+\z/).map { |s| s.to_s.delete("V").tr("_", ".").inspect }
raise ArgumentError, "Unknown migration version #{version.inspect}; expected one of #{versions.sort.join(', ')}"
end
const_get(name)
end
V5_1 = Current
module FourTwoShared
module TableDefinition
def references(*, **options)
options[:index] ||= false
super
end
alias :belongs_to :references
def timestamps(*, **options)
options[:null] = true if options[:null].nil?
super
end
end
def create_table(table_name, options = {})
if block_given?
super(table_name, options) do |t|
class << t
prepend TableDefinition
end
yield t
end
else
super
end
end
def change_table(table_name, options = {})
if block_given?
super(table_name, options) do |t|
class << t
prepend TableDefinition
end
yield t
end
else
super
end
end
def add_reference(*, **options)
options[:index] ||= false
super
end
alias :add_belongs_to :add_reference
def add_timestamps(*, **options)
options[:null] = true if options[:null].nil?
super
end
def index_exists?(table_name, column_name, options = {})
column_names = Array(column_name).map(&:to_s)
options[:name] =
if options[:name].present?
options[:name].to_s
else
index_name(table_name, column: column_names)
end
super
end
def remove_index(table_name, options = {})
options = { column: options } unless options.is_a?(Hash)
options[:name] = index_name_for_remove(table_name, options)
super(table_name, options)
end
private
def index_name_for_remove(table_name, options = {})
index_name = index_name(table_name, options)
unless index_name_exists?(table_name, index_name, true)
if options.is_a?(Hash) && options.has_key?(:name)
options_without_column = options.dup
options_without_column.delete :column
index_name_without_column = index_name(table_name, options_without_column)
return index_name_without_column if index_name_exists?(table_name, index_name_without_column, false)
end
raise ArgumentError, "Index name '#{index_name}' on table '#{table_name}' does not exist"
end
index_name
end
end
class V5_0 < V5_1
end
class V4_2 < V5_0
# 4.2 is defined as a module because it needs to be shared with
# Legacy. When the time comes, V5_0 should be defined straight
# in its class.
include FourTwoShared
end
module Legacy
include FourTwoShared
def migrate(*)
ActiveSupport::Deprecation.warn \
"Directly inheriting from ActiveRecord::Migration is deprecated. " \
"Please specify the Rails release the migration was written for:\n" \
"\n" \
" class #{self.class.name} < ActiveRecord::Migration[4.2]"
super
end
end
end
end
end
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