```ruby
unless respond_to?(:tap)
  class Object
    def tap
      yield self
      self
    end
  end
end

unless respond_to?(:try)
  class Object
    def try(*a, &b)
      if a.empty? && block_given?
        yield self
      else
        __send__(*a, &b)
      end
    end
  end

  class NilClass
    def try(*args); nil; end
  end
end

class ActiveRecord::Base
  # Instantiate a new NullDB connection.  Used by ActiveRecord internally.
  def self.nulldb_connection(config)
    ActiveRecord::ConnectionAdapters::NullDBAdapter.new(config)
  end
end


module ActiveRecord
  # Just make sure you have the latest version of your schema
  superclass = ActiveRecord::VERSION::MAJOR >= 5 ? Migration.public_send(:[], "#{ActiveRecord::VERSION::MAJOR}.#{ActiveRecord::VERSION::MINOR}".to_f) : Migration
  class Schema < superclass
    def self.define(info={}, &block)
      instance_eval(&block)
    end
  end
end
```

Fix monkey patch of Schema.define so it passes the info hash which is necessary to initialize schema_migrations table. Why does it matter when using nulldb? In some cases we us the nulldb adapter to get around database checks when the task we are running has no need for a database, like assets:precompile for production. This fix calls define correctly when you require nulldb but not necessarily using that adapter for all database.yml environments.
user
```ruby
unless respond_to?(:tap)
  class Object
    def tap
      yield self
      self
    end
  end
end

unless respond_to?(:try)
  class Object
    def try(*a, &b)
      if a.empty? && block_given?
        yield self
      else
        __send__(*a, &b)
      end
    end
  end

  class NilClass
    def try(*args); nil; end
  end
end

class ActiveRecord::Base
  # Instantiate a new NullDB connection.  Used by ActiveRecord internally.
  def self.nulldb_connection(config)
    ActiveRecord::ConnectionAdapters::NullDBAdapter.new(config)
  end
end


module ActiveRecord
  # Just make sure you have the latest version of your schema
  superclass = ActiveRecord::VERSION::MAJOR >= 5 ? Migration.public_send(:[], "#{ActiveRecord::VERSION::MAJOR}.#{ActiveRecord::VERSION::MINOR}".to_f) : Migration
  class Schema < superclass
    def self.define(info={}, &block)
      new.define(info, &block)
    end
  end
end
```
assistant