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module MigrationsHelpers
def table(name)
Class.new(ActiveRecord::Base) { self.table_name = name }
end
def migrations_paths
ActiveRecord::Migrator.migrations_paths
end
def table_exists?(name)
ActiveRecord::Base.connection.table_exists?(name)
end
def migrations
ActiveRecord::Migrator.migrations(migrations_paths)
end
def previous_migration
migrations.each_cons(2) do |previous, migration|
break previous if migration.name == described_class.name
end
end
def migrate!
ActiveRecord::Migrator.up(migrations_paths) do |migration|
migration.name == described_class.name
end
end
end
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