Class: Coupler::Models::Transformation

Inherits:
Sequel::Model
  • Object
show all
Includes:
CommonModel
Defined in:
lib/coupler/models/transformation.rb

Instance Method Summary collapse

Methods included from CommonModel

#before_save, #before_update, included, #save!, #touch!

Instance Method Details

#deletable? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/coupler/models/transformation.rb', line 38

def deletable?
  position == self.class.max(:position) &&
    (result_field.nil? || !result_field.is_generated || result_field.scenarios_dataset.count == 0)
end

#field_changes ⇒ Object 



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# File 'lib/coupler/models/transformation.rb', line 21

def field_changes
  transformer.field_changes(source_field)
end

#original_result_field_attributes ⇒ Object

NOTE: The fact that the aliased name doesn’t have an = at the end is important. Ruby methods with names that have = at the end always return the RHS value, regardless of what the method actually returns. The only way to grab the associated object that gets created from the nested attributes methods is by fetching the return value.



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# File 'lib/coupler/models/transformation.rb', line 31

alias :original_result_field_attributes :result_field_attributes=

#result_field_attributes=(h) ⇒ Object 



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# File 'lib/coupler/models/transformation.rb', line 32

def result_field_attributes=(h)
  @staged_result_field = self.original_result_field_attributes(h.merge({
    :is_generated => true
  }))
end

#transform(data) ⇒ Object 



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# File 'lib/coupler/models/transformation.rb', line 14

def transform(data)
  transformer.transform(data, {
    :in => source_field.name.to_sym,
    :out => result_field.name.to_sym
  })
end