Class: GraphitiGql::Loaders::BelongsTo

Inherits:
GraphQL::Batch::Loader
  • Object
show all
Defined in:
lib/graphiti_gql/loaders/belongs_to.rb

Instance Method Summary collapse

Constructor Details

#initialize(sideload, params) ⇒ BelongsTo

Returns a new instance of BelongsTo.



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# File 'lib/graphiti_gql/loaders/belongs_to.rb', line 11

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

Instance Method Details

#perform(ids) ⇒ Object 



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# File 'lib/graphiti_gql/loaders/belongs_to.rb', line 16

def perform(ids)
  Graphiti.broadcast("association", { sideload: @sideload })
  # process nils
  ids.each { |id| fulfill(id, nil) if id.nil? }
  ids.compact!
  return if ids.empty?

  if @params[:simpleid] && !to_polymorphic_resource?
    if @sideload.type == :polymorphic_belongs_to
      ids.each do |id|
        child = @sideload.children.values.find { |c| c.group_name == id[:type].to_sym }
        type = Schema::Registry.instance.get(child.resource.class, interface: false)[:type]
        fulfill(id, FakeRecord.new(id[:id], type, child.resource))
      end
    else
      type = Schema::Registry.instance.get(@sideload.resource.class)[:type]
      ids.each { |id| fulfill(id, FakeRecord.new(id, type, @sideload.resource)) }
    end
    return
  end

  if @sideload.type == :polymorphic_belongs_to
    groups = ids.group_by { |hash| hash[:type] }
    payload = {}
    groups.each_pair do |key, val|
      payload[key] = val.map { |v| v[:id] }
    end
    futures = []
    payload.each_pair do |key, value|
      params = { filter: {} }
      klass = @sideload.children.values.find { |c| c.group_name == key.to_sym }
      filter_ids = value.map { |id| @sideload.resource.class.gid(id.to_s) }
      params = @params.merge({
        filter: { id: { eq: filter_ids } }
      })

      futures << Concurrent::Future.execute do
         { type: key, data: klass.resource.class.all(params).data }
      end
    end
    values = futures.map(&:value)
    ids.each do |id|
      records_for_type = values.find { |v| v[:type] == id[:type] }
      corresponding = records_for_type[:data].find { |r| r.id == id[:id] }
      fulfill(id, corresponding)
    end
  else
    resource = Schema.registry.get(@sideload.resource.class)[:resource]
    params = @params.deep_dup
    unless resource.singular
      filter_ids = ids.map { |id| @sideload.resource.class.gid(id.to_s) }
      params[:filter] = {id: { eq: filter_ids } }
    end
    records = resource.all(params).data
    if resource.singular
      ids.each { |id| fulfill(id, records[0]) }
    else
      map = records.index_by { |record| record.id }
      ids.each { |id| fulfill(id, map[id]) }
    end
  end
end