35 lines
1.0 KiB
Ruby
35 lines
1.0 KiB
Ruby
# frozen_string_literal: true
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module Gitlab
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module Graphql
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module Loaders
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class BatchModelLoader
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attr_reader :model_class, :model_id, :preloads
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def initialize(model_class, model_id, preloads = nil)
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@model_class = model_class
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@model_id = model_id
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@preloads = preloads || []
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end
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# rubocop: disable CodeReuse/ActiveRecord
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def find
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BatchLoader::GraphQL.for([model_id.to_i, preloads]).batch(key: model_class) do |for_params, loader, args|
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model = args[:key]
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keys_by_id = for_params.group_by(&:first)
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ids = for_params.map(&:first)
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preloads = for_params.flat_map(&:second).uniq
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results = model.where(id: ids)
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results = results.preload(*preloads) unless preloads.empty?
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results.each do |record|
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keys_by_id.fetch(record.id, []).each { |k| loader.call(k, record) }
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end
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end
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end
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# rubocop: enable CodeReuse/ActiveRecord
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end
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end
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end
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end
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