diff options
Diffstat (limited to 'lib/gitlab/database/migration_helpers.rb')
-rw-r--r-- | lib/gitlab/database/migration_helpers.rb | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/lib/gitlab/database/migration_helpers.rb b/lib/gitlab/database/migration_helpers.rb index 6dabbe0264c..298b1a1f4e6 100644 --- a/lib/gitlab/database/migration_helpers.rb +++ b/lib/gitlab/database/migration_helpers.rb @@ -498,6 +498,29 @@ module Gitlab columns(table).find { |column| column.name == name } end + + # This will replace the first occurance of a string in a column with + # the replacement + # On postgresql we can use `regexp_replace` for that. + # On mysql we find the location of the pattern, and overwrite it + # with the replacement + def replace_sql(column, pattern, replacement) + quoted_pattern = Arel::Nodes::Quoted.new(pattern.to_s) + quoted_replacement = Arel::Nodes::Quoted.new(replacement.to_s) + + if Database.mysql? + locate = Arel::Nodes::NamedFunction. + new('locate', [quoted_pattern, column]) + insert_in_place = Arel::Nodes::NamedFunction. + new('insert', [column, locate, pattern.size, quoted_replacement]) + + Arel::Nodes::SqlLiteral.new(insert_in_place.to_sql) + else + replace = Arel::Nodes::NamedFunction. + new("regexp_replace", [column, quoted_pattern, quoted_replacement]) + Arel::Nodes::SqlLiteral.new(replace.to_sql) + end + end end end end |