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Fix n+1 query in settings migration for emoji reaction settings

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Jeremy Kescher 2023-05-08 19:34:04 +02:00
parent f1a71785b9
commit 8c64325cc6
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1 changed files with 17 additions and 16 deletions
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db/migrate/20230215074425_move_emoji_reaction_settings.rb
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@ -20,29 +20,30 @@ class MoveEmojiReactionSettings < ActiveRecord::Migration[6.1]
end
def up
User.find_each do |user|
previous_settings = LegacySetting.where(thing_type: 'User', thing_id: user.id).index_by(&:var)
User.find_in_batches do |users|
previous_settings_for_batch = LegacySetting.where(thing_type: 'User', thing_id: users.map(&:id)).group_by(&:thing_id)
user_settings = Oj.load(user.settings || '{}')
user_settings.delete('theme')
users.each do |user|
previous_settings = previous_settings_for_batch[user.id]&.index_by(&:var) || {}
user_settings = Oj.load(user.settings || '{}')
user_settings.delete('theme')
MAPPING.each do |legacy_key, new_key|
value = previous_settings[legacy_key]&.value
MAPPING.each do |legacy_key, new_key|
value = previous_settings[legacy_key]&.value
next if value.blank?
next if value.blank?
if value.is_a?(Hash)
value.each do |nested_key, nested_value|
user_settings[MAPPING[legacy_key][nested_key.to_sym]] = nested_value
if value.is_a?(Hash)
value.each do |nested_key, nested_value|
user_settings[MAPPING[legacy_key][nested_key.to_sym]] = nested_value
end
else
user_settings[new_key] = value
end
else
user_settings[new_key] = value
end
end
user.update_column('settings', Oj.dump(user_settings)) # rubocop:disable Rails/SkipsModelValidations
user.update_column('settings', Oj.dump(user_settings)) # rubocop:disable Rails/SkipsModelValidations
end
end
end
def down; end
end