new(direction, migrations, target_version = nil) public

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# File activerecord/lib/active_record/migration.rb, line 915
    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
      @migrations        = migrations

      validate(@migrations)

      Base.connection.initialize_schema_migrations_table
    end
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