19 lines
635 B
Ruby
19 lines
635 B
Ruby
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# frozen_string_literal: true
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class AddDraftCountToUserStat < ActiveRecord::Migration[6.1]
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def change
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add_column :user_stats, :draft_count, :integer, default: 0, null: false
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execute <<~SQL
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UPDATE user_stats
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SET draft_count = new_user_stats.draft_count
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FROM (SELECT user_stats.user_id, COUNT(drafts.id) draft_count
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FROM user_stats
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LEFT JOIN drafts ON user_stats.user_id = drafts.user_id
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GROUP BY user_stats.user_id) new_user_stats
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WHERE user_stats.user_id = new_user_stats.user_id
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AND user_stats.draft_count <> new_user_stats.draft_count
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SQL
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end
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end
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