Class: YamlExporter::Nodes::OneOwned

Inherits:
Object
  • Object
show all
Defined in:
lib/yaml_exporter/nodes/one_owned.rb

Overview

one :assoc do ... end — owned has_one child. The current record owns the child row; missing/null in YAML means "destroy the child".

Phase: :post_save (the child carries parent_id, so parent must be persisted first).

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name:, owner_class:, &block) ⇒ OneOwned

Returns a new instance of OneOwned.

Raises:

  • (ArgumentError) 


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# File 'lib/yaml_exporter/nodes/one_owned.rb', line 13

def initialize(name:, owner_class:, &block)
  raise ArgumentError, "`one #{name.inspect}`: block required" unless block

  @name = name.to_sym
  @owner_class = owner_class
  reflection = owner_class.reflect_on_association(@name)
  unless reflection
    raise ArgumentError,
          "`one #{name.inspect}`: #{owner_class} has no association `#{name}`"
  end

  @sub_structure = Builder.new(-> { target_class }, &block).build
end

Instance Attribute Details

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/yaml_exporter/nodes/one_owned.rb', line 11

def name
  @name
end

#owner_class ⇒ Object (readonly)

Returns the value of attribute owner_class.



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# File 'lib/yaml_exporter/nodes/one_owned.rb', line 11

def owner_class
  @owner_class
end

#sub_structure ⇒ Object (readonly)

Returns the value of attribute sub_structure.



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# File 'lib/yaml_exporter/nodes/one_owned.rb', line 11

def sub_structure
  @sub_structure
end

Instance Method Details

#export(record, exporter:) ⇒ Object 



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# File 'lib/yaml_exporter/nodes/one_owned.rb', line 52

def export(record, exporter:)
  child = record.public_send(@name)
  return [@name.to_s, nil] if child.nil?

  [@name.to_s, exporter.build_hash(child, @sub_structure)]
end

#import(record, data, path:, importer:) ⇒ Object 



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# File 'lib/yaml_exporter/nodes/one_owned.rb', line 39

def import(record, data, path:, importer:)
  child_data = data.key?(@name.to_s) ? data[@name.to_s] : nil

  if child_data.nil?
    destroy_existing(record)
    return
  end

  child = find_or_build_child(record)
  importer.apply(child, @sub_structure, child_data, path: child_path(path))
  cache_target(record, child)
end

#phase ⇒ Object 



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# File 'lib/yaml_exporter/nodes/one_owned.rb', line 27

def phase
  :post_save
end

#schema_fragment ⇒ Object 



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# File 'lib/yaml_exporter/nodes/one_owned.rb', line 59

def schema_fragment
  { @name => Schema.generate(@sub_structure) }
end

#target_class ⇒ Object 



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# File 'lib/yaml_exporter/nodes/one_owned.rb', line 35

def target_class
  @target_class ||= @owner_class.reflect_on_association(@name).klass
end

#yaml_keys ⇒ Object 



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# File 'lib/yaml_exporter/nodes/one_owned.rb', line 31

def yaml_keys
  [@name.to_s]
end