Class: Arel::Ordering

Inherits:
Object
  • Object
show all
Defined in:
lib/arel/algebra/ordering.rb,
lib/arel/engines/sql/primitives.rb,
lib/arel/engines/memory/primitives.rb

Direct Known Subclasses

Ascending, Descending

Instance Method Summary collapse

Instance Method Details

#bind(relation) ⇒ Object 



5
6
7
 
# File 'lib/arel/algebra/ordering.rb', line 5

def bind(relation)
  self.class.new(attribute.bind(relation))
end

#eval(row1, row2) ⇒ Object 



15
16
17
 
# File 'lib/arel/engines/memory/primitives.rb', line 15

def eval(row1, row2)
  (attribute.eval(row1) <=> attribute.eval(row2)) * direction
end

#to_ordering ⇒ Object 



9
10
11
 
# File 'lib/arel/algebra/ordering.rb', line 9

def to_ordering
  self
end

#to_sql(formatter = Sql::OrderClause.new(relation)) ⇒ Object 



55
56
57
 
# File 'lib/arel/engines/sql/primitives.rb', line 55

def to_sql(formatter = Sql::OrderClause.new(relation))
  formatter.ordering self
end