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Diffstat (limited to 'lib/gitlab/database/migration_helpers.rb')
| -rw-r--r-- | lib/gitlab/database/migration_helpers.rb | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/lib/gitlab/database/migration_helpers.rb b/lib/gitlab/database/migration_helpers.rb index 2c35da8f1aa..c276c3566b4 100644 --- a/lib/gitlab/database/migration_helpers.rb +++ b/lib/gitlab/database/migration_helpers.rb @@ -220,6 +220,15 @@ module Gitlab # column - The name of the column to update. # value - The value for the column. # + # The `value` argument is typically a literal. To perform a computed + # update, an Arel literal can be used instead: + # + # update_value = Arel.sql('bar * baz') + # + # update_column_in_batches(:projects, :foo, update_value) do |table, query| + # query.where(table[:some_column].eq('hello')) + # end + # # Rubocop's Metrics/AbcSize metric is disabled for this method as Rubocop # determines this method to be too complex while there's no way to make it # less "complex" without introducing extra methods (which actually will |