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Class: Arel::TreeManager

Do not use. This class is for internal use only.
Relationships & Source Files
Namespace Children
Modules:
StatementMethods
Extension / Inclusion / Inheritance Descendants
Subclasses:
DeleteManager, InsertManager, SelectManager, UpdateManager
Super Chains via Extension / Inclusion / Inheritance
Instance Chain:
self, FactoryMethods
Inherits: Object
Defined in: activerecord/lib/arel/tree_manager.rb

Class Method Summary

Instance Attribute Summary

Instance Method Summary

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) ⇒ TreeManager

[ GitHub ] 

  


# File 'activerecord/lib/arel/tree_manager.rb', line 47



def initialize(table = nil)
  @table = table
end


  







Instance Attribute Details



  

    #ast   (readonly)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/arel/tree_manager.rb', line 45



attr_reader :ast


  







Instance Method Details



  

    #initialize_copy(other)  
  

  [ GitHub ]


  

  


# File 'activerecord/lib/arel/tree_manager.rb', line 70



def initialize_copy(other)
  super
  @ast = @ast.clone
end


  








  

    #to_dot  
  

  [ GitHub ]


  

  


# File 'activerecord/lib/arel/tree_manager.rb', line 51



def to_dot
  collector = Arel::Collectors::PlainString.new
  collector = Visitors::Dot.new.accept @ast, collector
  collector.value
end


  








  

    #to_sql(engine = nil)  
  

  [ GitHub ]


  

  


# File 'activerecord/lib/arel/tree_manager.rb', line 57



def to_sql(engine = nil)
  unless engine
    table = @table.is_a?(Nodes::JoinSource) ? @table.left : @table

    engine = table&.klass || Table.engine
  end

  collector = Arel::Collectors::SQLString.new
  engine.with_connection do |connection|
    connection.visitor.accept(@ast, collector).value
  end
end