method

migrate

v7.0.0 - Show latest stable - 0 notes - Class: MigrationContext

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What's this?

migrate(target_version = nil, &block) public

Runs the migrations in the migrations_path.

If target_version is nil, migrate will run up.

If the current_version and target_version are both 0 then an empty array will be returned and no migrations will be run.

If the current_version in the schema is greater than the target_version, then down will be run.

If none of the conditions are met, up will be run with the target_version.

Show source

# File activerecord/lib/active_record/migration.rb, line 1088
    def migrate(target_version = nil, &block)
      case
      when target_version.nil?
        up(target_version, &block)
      when current_version == 0 && target_version == 0
        []
      when current_version > target_version
        down(target_version, &block)
      else
        up(target_version, &block)
      end
    end

migrate

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