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Class: Arel::Nodes::Window

Do not use. This class is for internal use only.
Relationships & Source Files
Extension / Inclusion / Inheritance Descendants
Subclasses:
NamedWindow
Super Chains via Extension / Inclusion / Inheritance
Class Chain:
self, Node
Instance Chain:
self, Node, ::Arel::FactoryMethods
Inherits: Arel::Nodes::Node
Defined in: activerecord/lib/arel/nodes/window.rb

Class Method Summary

Instance Attribute Summary

Node - Inherited

#equality?

Instance Method Summary

Node - Inherited

#and

Factory method to create an And node.
#fetch_attribute, #invert,
#not

Factory method to create a Nodes::Not node that has the recipient of the caller as a child.
#or

Factory method to create a Grouping node that has an Or node as a child.
#to_sql

FIXME: this method should go away.

::Arel::FactoryMethods - Included

#cast, #coalesce, #create_and, #create_false, #create_join, #create_on, #create_string_join, #create_table_alias, #create_true, #grouping,
#lower

Create a LOWER() function.

Constructor Details

.new ⇒ Window

[ GitHub ] 

  


# File 'activerecord/lib/arel/nodes/window.rb', line 8



def initialize
  @orders = []
  @partitions = []
  @framing = nil
end


  







Instance Attribute Details



  

    #framing   (rw)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/arel/nodes/window.rb', line 6



attr_accessor :orders, :framing, :partitions


  








  

    #orders   (rw)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/arel/nodes/window.rb', line 6



attr_accessor :orders, :framing, :partitions


  








  

    #partitions   (rw)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/arel/nodes/window.rb', line 6



attr_accessor :orders, :framing, :partitions


  







Instance Method Details



  

    #==(other)  
  



  

    

Alias for #eql?.


  



  [ GitHub ]


  

  


# File 'activerecord/lib/arel/nodes/window.rb', line 65



alias :== :eql?


  








  

    #eql?(other)  ⇒ Boolean 
    Also known as: #==
  



  

    
  





  


  [ GitHub ]


  

  


# File 'activerecord/lib/arel/nodes/window.rb', line 59



def eql?(other)
  self.class == other.class &&
    self.orders == other.orders &&
    self.framing == other.framing &&
    self.partitions == other.partitions
end


  








  

    #frame(expr)  
  

  [ GitHub ]


  

  


# File 'activerecord/lib/arel/nodes/window.rb', line 30



def frame(expr)
  @framing = expr
end


  








  

    #hash  
  

  [ GitHub ]


  

  


# File 'activerecord/lib/arel/nodes/window.rb', line 55



def hash
  [@orders, @framing].hash
end


  








  

    #initialize_copy(other)  
  

  [ GitHub ]


  

  


# File 'activerecord/lib/arel/nodes/window.rb', line 50



def initialize_copy(other)
  super
  @orders = @orders.map { |x| x.clone }
end


  








  

    #order(*expr)  
  

  [ GitHub ]


  

  


# File 'activerecord/lib/arel/nodes/window.rb', line 14



def order(*expr)
  # FIXME: We SHOULD NOT be converting these to SqlLiteral automatically
  @orders.concat expr.map { |x|
    String === x || Symbol === x ? Nodes::SqlLiteral.new(x.to_s) : x
  }
  self
end


  








  

    #partition(*expr)  
  

  [ GitHub ]


  

  


# File 'activerecord/lib/arel/nodes/window.rb', line 22



def partition(*expr)
  # FIXME: We SHOULD NOT be converting these to SqlLiteral automatically
  @partitions.concat expr.map { |x|
    String === x || Symbol === x ? Nodes::SqlLiteral.new(x.to_s) : x
  }
  self
end


  








  

    #range(expr = nil)  
  

  [ GitHub ]


  

  


# File 'activerecord/lib/arel/nodes/window.rb', line 42



def range(expr = nil)
  if @framing
    Range.new(expr)
  else
    frame(Range.new(expr))
  end
end


  








  

    #rows(expr = nil)  
  

  [ GitHub ]


  

  


# File 'activerecord/lib/arel/nodes/window.rb', line 34



def rows(expr = nil)
  if @framing
    Rows.new(expr)
  else
    frame(Rows.new(expr))
  end
end