diff options
Diffstat (limited to 'activerecord/lib/active_record/relation.rb')
| -rw-r--r-- | activerecord/lib/active_record/relation.rb | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/activerecord/lib/active_record/relation.rb b/activerecord/lib/active_record/relation.rb index d612ff53c1..6d954a2b2e 100644 --- a/activerecord/lib/active_record/relation.rb +++ b/activerecord/lib/active_record/relation.rb @@ -5,7 +5,7 @@ module ActiveRecord class Relation MULTI_VALUE_METHODS = [:includes, :eager_load, :preload, :select, :group, :order, :joins, :left_outer_joins, :references, - :extending, :unscope] + :extending, :unscope, :optimizer_hints] SINGLE_VALUE_METHODS = [:limit, :offset, :lock, :readonly, :reordering, :reverse_order, :distinct, :create_with, :skip_query_cache] @@ -197,6 +197,10 @@ module ActiveRecord # if a DELETE between those two statements is run by another client. But for most applications, # that's a significantly less likely condition to hit. # * It relies on exception handling to handle control flow, which may be marginally slower. + # * The primary key may auto-increment on each create, even if it fails. This can accelerate + # the problem of running out of integers, if the underlying table is still stuck on a primary + # key of type int (note: All Rails apps since 5.1+ have defaulted to bigint, which is not liable + # to this problem). # # This method will return a record if all given attributes are covered by unique constraints # (unless the INSERT -> DELETE -> SELECT race condition is triggered), but if creation was attempted @@ -338,6 +342,8 @@ module ActiveRecord # trigger Active Record callbacks or validations. However, values passed to #update_all will still go through # Active Record's normal type casting and serialization. # + # Note: As Active Record callbacks are not triggered, this method will not automatically update +updated_at+/+updated_on+ columns. + # # ==== Parameters # # * +updates+ - A string, array, or hash representing the SET part of an SQL statement. @@ -412,10 +418,10 @@ module ActiveRecord update_all updates end - # Touches all records in the current relation without instantiating records first with the updated_at/on attributes + # Touches all records in the current relation without instantiating records first with the +updated_at+/+updated_on+ attributes # set to the current time or the time specified. # This method can be passed attribute names and an optional time argument. - # If attribute names are passed, they are updated along with updated_at/on attributes. + # If attribute names are passed, they are updated along with +updated_at+/+updated_on+ attributes. # If no time argument is passed, the current time is used as default. # # === Examples |