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Class: ActiveRecord::Key::Composite

Do not use. This class is for internal use only.
Relationships & Source Files
Super Chains via Extension / Inclusion / Inheritance
Class Chain:
self, Key
Instance Chain:
self, Key
Inherits: Key
  • ::Object
Defined in: activerecord/lib/active_record/key.rb

Class Method Summary

Instance Attribute Summary

Instance Method Summary

Constructor Details

.new(columns) ⇒ Composite

[ GitHub ] 

  


# File 'activerecord/lib/active_record/key.rb', line 123



def initialize(columns)
  @columns = columns.map { |column| -column.to_s }.freeze
  @name = @columns
end


  







Instance Attribute Details



  

    #composite?  ⇒ Boolean  (readonly)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/key.rb', line 128



def composite?
  true
end


  







Instance Method Details



  

    #arel_columns(table)  
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/key.rb', line 136



def arel_columns(table)
  @columns.map { |column| table[column] }
end


  








  

    #cast(values, model)  
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/key.rb', line 140



def cast(values, model)
  @columns.zip(values).map! { |column, value| model.type_for_attribute(column).cast(value) }
end


  








  

    #expects_multiple_ids?(value)  ⇒ Boolean 
  



  

    
A single composite id is itself an ::Array, so several ids are an ::Array of
Arrays.

  





  


  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/key.rb', line 150



def expects_multiple_ids?(value)
  value.first.is_a?(Array)
end


  








  

    #inferred_id  
  



  

    
When a composite key has the conventional [tenant_key, "id"] shape,
associations join on "id" alone; otherwise the whole key is used.

  



  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/key.rb', line 156



def inferred_id
  @columns.include?("id") ? "id" : @name
end


  








  

    #value_of(record)  
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/key.rb', line 144



def value_of(record)
  @columns.map { |column| record._read_attribute(column) }
end


  








  

    #where_clauses(values)  
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/key.rb', line 160



def where_clauses(values)
  values.map { |set| where_hash(set) }
end


  








  

    #where_hash(values)  
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/key.rb', line 132



def where_hash(values)
  @columns.zip(values).to_h
end