Class: Arel::Predicates::Unary

Inherits:
Predicate show all
Defined in:
lib/arel/algebra/predicates.rb,
lib/arel/engines/sql/predicates.rb,
lib/arel/engines/memory/predicates.rb

Direct Known Subclasses

Not

Instance Method Summary collapse

Methods inherited from Predicate

#and, #complement, #not, #or

Instance Method Details

#bind(relation) ⇒ Object 



78
79
80
 
# File 'lib/arel/algebra/predicates.rb', line 78

def bind(relation)
  self.class.new(operand.find_correlate_in(relation))
end

#eval(row) ⇒ Object 



10
11
12
 
# File 'lib/arel/engines/memory/predicates.rb', line 10

def eval(row)
  operand.eval(row).send(operator)
end

#to_sql(formatter = nil) ⇒ Object 



10
11
12
 
# File 'lib/arel/engines/sql/predicates.rb', line 10

def to_sql(formatter = nil)
  "#{predicate_sql} (#{operand.to_sql(formatter)})"
end