new(direction, migrations, schema_migration, target_version = nil) public

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# File activerecord/lib/active_record/migration.rb, line 1249
    def initialize(direction, migrations, schema_migration, target_version = nil)
      @direction         = direction
      @target_version    = target_version
      @migrated_versions = nil
      @migrations        = migrations
      @schema_migration  = schema_migration

      validate(@migrations)

      @schema_migration.create_table
      ActiveRecord::InternalMetadata.create_table
    end
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