Module: ROM::SQL::Plugin::Nullify

Defined in:

lib/rom/sql/plugin/nullify.rb

Overview

Nullify relation by

Instance Method Summary

• #nullify ⇒ SQL::Relation

  Returns a relation that will never issue a query to the database.

Instance Method Details

#nullify ⇒ SQL::Relation

Returns a relation that will never issue a query to the database. It implements the null object pattern for relations.

Examples:

result will always be empty, regardless if records exists

users.where(name: 'Alice').nullify

Returns:

• (SQL::Relation)

See Also:

• http://sequel.jeremyevans.net/rdoc-plugins/files/lib/sequel/extensions/null_dataset_rb.html

# File 'lib/rom/sql/plugin/nullify.rb', line 16

def nullify
  where { `1 = 0` }
end