diff options
Diffstat (limited to 'activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb')
-rw-r--r-- | activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb | 20 |
1 files changed, 17 insertions, 3 deletions
diff --git a/activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb b/activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb index e919068909..be712f2334 100644 --- a/activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb +++ b/activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb @@ -312,13 +312,27 @@ module ActiveRecord # on mysql (even when aliasing the tables), but mysql allows using JOIN directly in # an UPDATE statement, so in the mysql adapters we redefine this to do that. def join_to_update(update, select) #:nodoc: - subselect = select.clone - subselect.projections = [update.key] + key = update.key + subselect = subquery_for(key, select) - update.where update.key.in(subselect) + update.where key.in(subselect) + end + + def join_to_delete(delete, select, key) #:nodoc: + subselect = subquery_for(key, select) + + delete.where key.in(subselect) end protected + + # Return a subquery for the given key using the join information. + def subquery_for(key, select) + subselect = select.clone + subselect.projections = [key] + subselect + end + # Returns an array of record hashes with the column names as keys and # column values as values. def select(sql, name = nil, binds = []) |