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Class: Arel::UpdateManager

Do not use. This class is for internal use only.
Relationships & Source Files
Super Chains via Extension / Inclusion / Inheritance
Class Chain:
self, TreeManager
Instance Chain:
self, TreeManager::StatementMethods, TreeManager, FactoryMethods
Inherits: Arel::TreeManager
Defined in: activerecord/lib/arel/update_manager.rb

Class Method Summary

Instance Attribute Summary

TreeManager::StatementMethods - Included

#key, #key=, #wheres=

TreeManager - Inherited

#ast

Instance Method Summary

TreeManager::StatementMethods - Included

#offset, #order, #take, #where

TreeManager - Inherited

#initialize_copy, #to_dot, #to_sql

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(table = nil) ⇒ UpdateManager

[ GitHub ] 

  


# File 'activerecord/lib/arel/update_manager.rb', line 7



def initialize(table = nil)
  @ast = Nodes::UpdateStatement.new(table)
end


  







Instance Method Details



  

    #group(columns)  
  

  [ GitHub ]


  

  


# File 'activerecord/lib/arel/update_manager.rb', line 33



def group(columns)
  columns.each do |column|
    column = Nodes::SqlLiteral.new(column) if String === column
    column = Nodes::SqlLiteral.new(column.to_s) if Symbol === column

    @ast.groups.push Nodes::Group.new column
  end

  self
end


  








  

    #having(expr)  
  

  [ GitHub ]


  

  


# File 'activerecord/lib/arel/update_manager.rb', line 44



def having(expr)
  @ast.havings << expr
  self
end


  








  

    #set(values)  
  

  [ GitHub ]


  

  


# File 'activerecord/lib/arel/update_manager.rb', line 18



def set(values)
  case values
  when String, Nodes::BoundSqlLiteral
    @ast.values = [values]
  else
    @ast.values = values.map { |column, value|
      Nodes::Assignment.new(
        Nodes::UnqualifiedColumn.new(column),
        value
      )
    }
  end
  self
end


  








  

    #table(table)  
  



  

    

UPDATE table


  



  [ GitHub ]


  

  


# File 'activerecord/lib/arel/update_manager.rb', line 13



def table(table)
  @ast.relation = table
  self
end