Method: Sequel::Schema::AlterTableGenerator#add_constraint

Defined in:
lib/sequel/database/schema_generator.rb

#add_constraint(name, *args, &block) ⇒ Object

Add a constraint with the given name and args. See CreateTableGenerator#constraint.

add_constraint(:valid_name, Sequel.like(:name, 'A%'))
# ADD CONSTRAINT valid_name CHECK (name LIKE 'A%' ESCAPE '\')
add_constraint({name: :valid_name, deferrable: true}, Sequel.like(:name, 'A%'))
# ADD CONSTRAINT valid_name CHECK (name LIKE 'A%' ESCAPE '\') DEFERRABLE INITIALLY DEFERRED



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# File 'lib/sequel/database/schema_generator.rb', line 471

def add_constraint(name, *args, &block)
  opts = name.is_a?(Hash) ? name : {:name=>name}
  @operations << opts.merge(:op=>:add_constraint, :type=>:check, :check=>block || args)
  nil
end