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Class: ActiveModel::IndexedRow::Mutable

Relationships & Source Files
Super Chains via Extension / Inclusion / Inheritance
Class Chain:
self, ::ActiveModel::IndexedRow
Instance Chain:
self, ::ActiveModel::IndexedRow
Inherits: ActiveModel::IndexedRow
Defined in: activemodel/lib/active_model/indexed_row.rb

Constant Summary

Class Method Summary

::ActiveModel::IndexedRow - Inherited

.[], .build_indexes, .new

Instance Attribute Summary

::ActiveModel::IndexedRow - Inherited

#indexes, #row

Instance Method Summary

::ActiveModel::IndexedRow - Inherited

#==, #[], #each_key, #eql?, #fetch, #hash, #key?, #keys,
#length

Alias for #size.
#new_empty_mutable_row, #size, #to_h,
#to_hash

Alias for #to_h.
#values, #values_at

Constructor Details

.new(indexes, row = nil) ⇒ Mutable

[ GitHub ] 

  


# File 'activemodel/lib/active_model/indexed_row.rb', line 124



def initialize(indexes, row = nil)
  @indexes = indexes
  @row = row || Array.new(indexes.size, UNSET)
end


  







Instance Method Details



  

    #[](column)  
  

  [ GitHub ]


  

  


# File 'activemodel/lib/active_model/indexed_row.rb', line 157



def [](column)
  if index = @indexes[column]
    value = @row[index]
    return if UNSET.equal?(value)
    value
  end
end


  








  

    #[]=(column, value)  
  

  [ GitHub ]


  

  


# File 'activemodel/lib/active_model/indexed_row.rb', line 165



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


  








  

    #fetch(column)  
  

  [ GitHub ]


  

  


# File 'activemodel/lib/active_model/indexed_row.rb', line 173



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


  








  

    #key?(column)  ⇒ Boolean 
  



  

    
  





  


  [ GitHub ]


  

  


# File 'activemodel/lib/active_model/indexed_row.rb', line 138



def key?(column)
  index = @indexes[column]
  index && !UNSET.equal?(@row[index])
end


  








  

    #keys  
  

  [ GitHub ]


  

  


# File 'activemodel/lib/active_model/indexed_row.rb', line 134



def keys
  @indexes.reject { |k, v| UNSET.equal?(@row[v]) }.keys
end


  








  

    #length  
  



  

    
Alias for #size.

  



  [ GitHub ]


  

  


# File 'activemodel/lib/active_model/indexed_row.rb', line 132



alias_method :length, :size


  








  

    #size  
    Also known as: #length
  

  [ GitHub ]


  

  


# File 'activemodel/lib/active_model/indexed_row.rb', line 129



def size
  @indexes.size - @row.count(UNSET)
end


  








  

    #to_h  
    Also known as: #to_hash
  

  [ GitHub ]


  

  


# File 'activemodel/lib/active_model/indexed_row.rb', line 192



def to_h
  @indexes.transform_values { |index| @row[index] }.reject { |k, v| UNSET.equal?(v) }
end


  








  

    #to_hash  
  



  

    
Alias for #to_h.

  



  [ GitHub ]


  

  


# File 'activemodel/lib/active_model/indexed_row.rb', line 195



alias_method :to_hash, :to_h


  








  

    #values  
  

  [ GitHub ]


  

  


# File 'activemodel/lib/active_model/indexed_row.rb', line 143



def values
  @row.reject { |v| UNSET.equal?(v) }
end


  








  

    #values_at(*columns)  
  

  [ GitHub ]


  

  


# File 'activemodel/lib/active_model/indexed_row.rb', line 147



def values_at(*columns)
  columns.map! do |column|
    if index = @indexes[column]
      value = @row[index]
      UNSET.equal?(value) ? nil : value
    end
  end
  columns
end