app/models/merge_requests_closing_issues.rb


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class MergeRequestsClosingIssues < ActiveRecord::Base
  belongs_to :merge_request
  belongs_to :issue

  validates :merge_request_id, uniqueness: { scope: :issue_id }, presence: true
  validates :issue_id, presence: true

  class << self
    def count_for_collection(ids)
      group(:issue_id)
        .where(issue_id: ids)
        .pluck('issue_id', 'COUNT(*) as count')
    end
  end
end