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Class: ActiveModel::IndexedRow

Do not use. This class is for internal use only.
Relationships & Source Files
Namespace Children
Classes:
Mutable, Remapper
Extension / Inclusion / Inheritance Descendants
Subclasses:
Mutable
Inherits: Object
Defined in: activemodel/lib/active_model/indexed_row.rb

Class Method Summary

Instance Attribute Summary

Instance Method Summary

Constructor Details

.new(indexes, row) ⇒ IndexedRow

[ GitHub ] 

  


# File 'activemodel/lib/active_model/indexed_row.rb', line 24



def initialize(indexes, row)
  @indexes = indexes
  @row = row
end


  







Class Method Details



  

    .[](hash)  
  

  [ GitHub ]


  

  


# File 'activemodel/lib/active_model/indexed_row.rb', line 8



def [](hash)
  return hash if hash.is_a?(self)

  index = -1
  column_indexes = hash.transform_values { index += 1 }.freeze
  new(column_indexes, hash.values.freeze)
end


  








  

    .build_indexes(columns)  
  

  [ GitHub ]


  

  


# File 'activemodel/lib/active_model/indexed_row.rb', line 16



def build_indexes(columns)
  index = -1
  columns.index_with { index += 1 }
end


  







Instance Attribute Details



  

    #indexes   (readonly)
  

  [ GitHub ]


  

  


# File 'activemodel/lib/active_model/indexed_row.rb', line 22



attr_reader :indexes, :row


  








  

    #row   (readonly)
  

  [ GitHub ]


  

  


# File 'activemodel/lib/active_model/indexed_row.rb', line 22



attr_reader :indexes, :row


  







Instance Method Details



  

    #==(other)  
  

  [ GitHub ]


  

  


# File 'activemodel/lib/active_model/indexed_row.rb', line 55



def ==(other)
  if other.is_a?(Hash)
    to_hash == other
  else
    super
  end
end


  








  

    #[](column)  
  

  [ GitHub ]


  

  


# File 'activemodel/lib/active_model/indexed_row.rb', line 87



def [](column)
  if index = @indexes[column]
    @row[index]
  end
end


  








  

    #each_key(&block)  
  

  [ GitHub ]


  

  


# File 'activemodel/lib/active_model/indexed_row.rb', line 34



def each_key(&block)
  @indexes.each_key(&block)
end


  








  

    #eql?(other)  ⇒ Boolean 
  



  

    
  





  


  [ GitHub ]


  

  


# File 'activemodel/lib/active_model/indexed_row.rb', line 67



def eql?(other)
  other.is_a?(IndexedRow) &&
    @indexes == other.indexes &&
    @row == other.row
end


  








  

    #fetch(column)  
  

  [ GitHub ]


  

  


# File 'activemodel/lib/active_model/indexed_row.rb', line 77



def fetch(column)
  if index = @indexes[column]
    @row[index]
  elsif block_given?
    yield
  else
    raise KeyError, "key not found: #{column.inspect}"
  end
end


  








  

    #hash  
  

  [ GitHub ]


  

  


# File 'activemodel/lib/active_model/indexed_row.rb', line 63



def hash
  [IndexedRow, @indexes, @row].hash
end


  








  

    #key?(column)  ⇒ Boolean 
  



  

    
  





  


  [ GitHub ]


  

  


# File 'activemodel/lib/active_model/indexed_row.rb', line 73



def key?(column)
  @indexes.key?(column)
end


  








  

    #keys  
  

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# File 'activemodel/lib/active_model/indexed_row.rb', line 38



def keys
  @indexes.keys
end


  








  

    #length  
  



  

    
Alias for #size.

  



  [ GitHub ]


  

  


# File 'activemodel/lib/active_model/indexed_row.rb', line 32



alias_method :length, :size


  








  

    #new_empty_mutable_row  
  

  [ GitHub ]


  

  


# File 'activemodel/lib/active_model/indexed_row.rb', line 98



def new_empty_mutable_row
  Mutable.new(@indexes)
end


  








  

    #size  
    Also known as: #length
  

  [ GitHub ]


  

  


# File 'activemodel/lib/active_model/indexed_row.rb', line 29



def size
  @indexes.size
end


  








  

    #to_h  
    Also known as: #to_hash
  

  [ GitHub ]


  

  


# File 'activemodel/lib/active_model/indexed_row.rb', line 93



def to_h
  @indexes.transform_values { |index| @row[index] }
end


  








  

    #to_hash  
  



  

    
Alias for #to_h.

  



  [ GitHub ]


  

  


# File 'activemodel/lib/active_model/indexed_row.rb', line 96



alias_method :to_hash, :to_h


  








  

    #values  
  

  [ GitHub ]


  

  


# File 'activemodel/lib/active_model/indexed_row.rb', line 42



def values
  @row.dup
end


  








  

    #values_at(*columns)  
  

  [ GitHub ]


  

  


# File 'activemodel/lib/active_model/indexed_row.rb', line 46



def values_at(*columns)
  columns.map! do |column|
    if index = @indexes[column]
      @row[index]
    end
  end
  columns
end