13 lines
473 B
Ruby
13 lines
473 B
Ruby
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class Conflicts
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include ActiveModel::Model
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attr_accessor :left, :right
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def conflicts
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TalkPreference.joins('INNER JOIN "selected_talks" AS left
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ON "left"."talk_preference_id" = "talk_preferences"."unique_id"
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INNER JOIN "selected_talks" AS right
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ON "right"."talk_preference_id" = "talk_preferences"."unique_id"').where(left: {talk_id: @left}, right: {talk_id: @right}).count
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end
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end
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