Class: CSVStepImporter::Model::Model

Inherits:
Node
  • Object
show all
Defined in:
lib/csv_step_importer/model/model.rb

Direct Known Subclasses

ImportableModel

Instance Attribute Summary collapse

Attributes inherited from Node

#children, #env, #parent

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Node

#add_children, #build_env, #create_or_update, #run_validations!, #validate_children

Methods inherited from Base

#ancestors, #assign_attributes, #create_or_update, #inspect, #persisted?, #save, #save!, set, #to_s, #update

Constructor Details

#initialize(**attributes) ⇒ Model

Logic



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# File 'lib/csv_step_importer/model/model.rb', line 24

def initialize(**attributes)
  super **attributes

  add_daos
  filter_daos! if composite_key_columns
  add_model_children
end

Instance Attribute Details

#dao_values ⇒ Object

Returns the value of attribute dao_values.



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# File 'lib/csv_step_importer/model/model.rb', line 8

def dao_values
  @dao_values
end

Class Method Details

.cache_key(pluralize: false) ⇒ Object

Configuration



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# File 'lib/csv_step_importer/model/model.rb', line 36

def self.cache_key(pluralize: false)
  key = name.underscore.gsub("/", "_")
  (pluralize ? key.pluralize : key.singularize).to_sym
end

Instance Method Details

#add_daos ⇒ Object 



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# File 'lib/csv_step_importer/model/model.rb', line 61

def add_daos
  dao_node_children = rows.collect do |row|
    build_daos_for_row row
  end.flatten.compact

  link_rows_to_daos daos: dao_node_children

  dao_node.add_children dao_node_children
end

#add_model_children ⇒ Object

Logic



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# File 'lib/csv_step_importer/model/model.rb', line 45

def add_model_children
  add_children dao_node, prepend: true
end

#build_daos_for_row(row) ⇒ Object

can return nil, a single object or an array of objects



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# File 'lib/csv_step_importer/model/model.rb', line 72

def build_daos_for_row(row)
  dao_class.new parent: dao_node, row: row
end

#dao_node ⇒ Object 



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# File 'lib/csv_step_importer/model/model.rb', line 57

def dao_node
  @dao_node ||= CSVStepImporter::Node.new parent: self
end

#daos ⇒ Object 



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# File 'lib/csv_step_importer/model/model.rb', line 49

def daos
  dao_node.children
end

#filter_daos! ⇒ Object

TODO a possible feature would be to add validation errors if the duplicates do not match in all columns (columns other than the composite key)



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# File 'lib/csv_step_importer/model/model.rb', line 77

def filter_daos!
  unique_daos = {}

  daos.keep_if do |dao|
    hash = dao.values_for(composite_key_columns).hash
    keep = (unique_daos[hash] ||= dao) == dao

    # unlink to be deleted dao and add a link to
    dao.unlink! replace_with: unique_daos[hash] unless keep

    keep
  end
end

#link_rows_to_daos(daos:) ⇒ Object 



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# File 'lib/csv_step_importer/model/model.rb', line 91

def link_rows_to_daos(daos:)
  daos.each(&:link!)
end