Class: RelationToJSON::HasOneReflection

Inherits:
BaseReflection show all
Defined in:
lib/relation_to_json/has_one_reflection.rb

Instance Attribute Summary

Attributes inherited from BaseReflection

#name, #reflection, #required_columns

Instance Method Summary collapse

Methods inherited from BaseReflection

#foreign_key, #initialize, #primary_key

Constructor Details

This class inherits a constructor from RelationToJSON::BaseReflection

Instance Method Details

#association_relation(transposed) ⇒ Object 



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# File 'lib/relation_to_json/has_one_reflection.rb', line 21

def association_relation(transposed)
  query = { foreign_key => transposed[primary_key] }
  query[polymorphic_association_key] = foreign_class if polymorphic?
  klass.where(**query)
end

#foreign_class ⇒ Object 



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# File 'lib/relation_to_json/has_one_reflection.rb', line 36

def foreign_class
  reflection.active_record.name
end

#pluck_association_columns(transposed) ⇒ Object 



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# File 'lib/relation_to_json/has_one_reflection.rb', line 5

def pluck_association_columns(transposed)
  return recurse_json_with_schema(transposed) if nested_relations?

  required_columns = Set[primary_key, *@required_columns]
  plucked_attributes = association_relation(transposed)
    .pluck(*required_columns)
    .map { |plucked| required_columns.zip(Array.wrap(plucked)).to_h }

  foreign_key_indexed_plucked_values = plucked_attributes
    .to_h { |attributes| [attributes[foreign_key], attributes] }

  transposed.fetch(primary_key, []).map do |record_foreign_key|
    foreign_key_indexed_plucked_values[record_foreign_key]
  end
end

#polymorphic? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/relation_to_json/has_one_reflection.rb', line 27

def polymorphic?
  reflection.inverse_of.polymorphic?
end

#polymorphic_association_key ⇒ Object 



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# File 'lib/relation_to_json/has_one_reflection.rb', line 31

def polymorphic_association_key
  # *_type
  reflection.type
end