Class: Arel::Nodes::Function

Inherits:

Node

• Object
• Node
• Arel::Nodes::Function

Includes:

Expression

Defined in:

lib/arel/nodes/function.rb

Direct Known Subclasses

Avg, Count, Exists, Max, Min, Sum

Instance Attribute Summary

• #alias ⇒ Object

  Returns the value of attribute alias.

• #expressions ⇒ Object

  Returns the value of attribute expressions.

Instance Method Summary

• #as(aliaz) ⇒ Object
• #initialize(expr, aliaz = nil) ⇒ Function constructor

  A new instance of Function.

Methods inherited from Node

#and, #each, #not, #or, #to_sql

Constructor Details

#initialize(expr, aliaz = nil) ⇒ Function

Returns a new instance of Function.

# File 'lib/arel/nodes/function.rb', line 7

def initialize expr, aliaz = nil
  @expressions = expr
  @alias       = aliaz
end

Instance Attribute Details

#alias ⇒ Object

Returns the value of attribute alias.

# File 'lib/arel/nodes/function.rb', line 5

def alias
  @alias
end

#expressions ⇒ Object

Returns the value of attribute expressions.

# File 'lib/arel/nodes/function.rb', line 5

def expressions
  @expressions
end

Instance Method Details

#as(aliaz) ⇒ Object

# File 'lib/arel/nodes/function.rb', line 12

def as aliaz
  self.alias = SqlLiteral.new(aliaz)
  self
end