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30990006a9
This reduces chances of errors where consumers of strings mutate inputs and reduces memory usage of the app. Test suite passes now, but there may be some stuff left, so we will run a few sites on a branch prior to merging
37 lines
945 B
Ruby
37 lines
945 B
Ruby
# frozen_string_literal: true
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class AddUserBadgeUniqueIndex < ActiveRecord::Migration[4.2]
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def up
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# used to keep badges distinct
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add_column :user_badges, :seq, :integer, default: 0, null: false
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# invent artificial seq for badges
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execute "
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UPDATE user_badges ub1 SET seq = X.seq
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FROM (
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SELECT ub.id, rank() OVER (PARTITION BY user_id ORDER BY granted_at) seq
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FROM user_badges ub
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JOIN badges b ON b.id = ub.badge_id
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WHERE b.multiple_grant
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) X
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WHERE ub1.id = X.id
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"
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# delete all single award dupes
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execute "
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DELETE FROM user_badges ub1
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WHERE ub1.id NOT IN (
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SELECT MIN(ub.id)
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FROM user_badges ub
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GROUP BY ub.user_id, ub.badge_id, ub.seq
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)
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"
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add_index :user_badges, [:badge_id, :user_id, :seq], unique: true, where: 'post_id IS NULL'
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end
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def down
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remove_column :user_badges, :seq, :integer
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end
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end
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