new(direction, migrations, target_version = nil) public

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# File activerecord/lib/active_record/migration.rb, line 862
    def initialize(direction, migrations, target_version = nil)
      raise StandardError.new("This database does not yet support migrations") unless Base.connection.supports_migrations?

      @direction         = direction
      @target_version    = target_version
      @migrated_versions = nil

      if Array(migrations).grep(String).empty?
        @migrations = migrations
      else
        ActiveSupport::Deprecation.warn "instantiate this class with a list of migrations"
        @migrations = self.class.migrations(migrations)
      end

      validate(@migrations)

      ActiveRecord::SchemaMigration.create_table
    end
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