Class: GraphitiGql::Schema::Fields::ToOne

Inherits:
Object
  • Object
show all
Defined in:
lib/graphiti_gql/schema/fields/to_one.rb

Instance Method Summary collapse

Constructor Details

#initialize(sideload, sideload_type) ⇒ ToOne

Returns a new instance of ToOne.



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# File 'lib/graphiti_gql/schema/fields/to_one.rb', line 5

def initialize(sideload, sideload_type)
  @sideload = sideload
  @sideload_type = sideload_type
end

Instance Method Details

#apply(type) ⇒ Object 



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# File 'lib/graphiti_gql/schema/fields/to_one.rb', line 10

def apply(type)
  field = type.field @sideload.name,
    @sideload_type,
    null: true,
    extras: [:lookahead]
  _sideload = @sideload
  type.define_method(@sideload.name) do |**arguments|
    Util.is_readable_sideload!(_sideload)

    if _sideload.type == :has_one
      id = object.send(_sideload.primary_key)
      params = { filter: { _sideload.foreign_key => { eq: id } } }

      resource = Schema.registry.get(@sideload.resource.class)[:resource]
      return resource.all(params).data[0]
    end

    lookahead = arguments[:lookahead]
    id = object.send(_sideload.foreign_key)
    if id.nil?
      Loaders::BelongsTo.for(_sideload, {}).load(nil)
    else
      params = Util.params_from_args(arguments)

      if _sideload.type == :polymorphic_belongs_to
        id = { id: id, type: object.send(_sideload.grouper.field_name) }
      end

      selections = lookahead.selections.map(&:name).sort
      if selections == [:id] || selections == [:__typename, :id]
        params[:simpleid] = true
      end
      Loaders::BelongsTo.for(_sideload, params).load(id)
    end
  end
end