28 lines
934 B
Ruby
28 lines
934 B
Ruby
# frozen_string_literal: true
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module Preloaders
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# This class preloads the `merge_request_diff` association for the given merge request models.
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#
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# Usage:
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# merge_requests = MergeRequest.where(...)
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# Preloaders::MergeRequestDiffPreloader.new(merge_requests).preload_all
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# merge_requests.first.merge_request_diff # won't fire any query
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class MergeRequestDiffPreloader
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def initialize(merge_requests)
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@merge_requests = merge_requests
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end
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def preload_all
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merge_request_diffs = MergeRequestDiff.latest_diff_for_merge_requests(@merge_requests)
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cache = merge_request_diffs.index_by { |diff| diff.merge_request_id }
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@merge_requests.each do |merge_request|
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merge_request_diff = cache[merge_request.id]
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merge_request.association(:merge_request_diff).target = merge_request_diff
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merge_request.association(:merge_request_diff).loaded!
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end
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end
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end
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end
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