Class: FlattenRecord::Meta::Column

Inherits:
Node
  • Object
show all
Defined in:
lib/flatten_record/meta/column.rb

Direct Known Subclasses

ComputeColumn, IdColumn, MethodColumn

Instance Attribute Summary collapse

Attributes inherited from Node

#children, #model, #parent, #target_model

Instance Method Summary collapse

Methods inherited from Node

#prefix, #traverse_by

Constructor Details

#initialize(parent, col, target_model, model) ⇒ Column

Returns a new instance of Column.



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# File 'lib/flatten_record/meta/column.rb', line 6

def initialize(parent, col, target_model, model)
  super(parent, target_model, model)
  @column = Struct.
    new(:name, :default, :type, :null).
    new(col.name, col.default, col.type, col.null)
end

Instance Attribute Details

#column ⇒ Object (readonly)

Returns the value of attribute column.



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# File 'lib/flatten_record/meta/column.rb', line 4

def column
  @column
end

Instance Method Details

#denormalize(instance, to_record) ⇒ Object 



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# File 'lib/flatten_record/meta/column.rb', line 21

def denormalize(instance, to_record)
  return nullify(to_records) if instance.blank?

  if instance.respond_to?(@column.name)
    to_record = assign_value(to_record, name) do |record|
      instance.send(@column.name.to_sym)
    end
  else
    raise "#{@column.name} is not found in #{instance.inspect}"
  end
  to_record
end

#name ⇒ Object 



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# File 'lib/flatten_record/meta/column.rb', line 13

def name
  parent.prefix + @column.name.to_s  
end

#nullify(to_record) ⇒ Object 



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# File 'lib/flatten_record/meta/column.rb', line 34

def nullify(to_record)
  assign_value(to_record, name) do |record|
    nil
  end
end

#type ⇒ Object 



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# File 'lib/flatten_record/meta/column.rb', line 17

def type
  @column.type
end