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-rw-r--r--activerecord/lib/active_record/associations/collection_association.rb2
-rw-r--r--activerecord/lib/active_record/relation/finder_methods.rb9
2 files changed, 9 insertions, 2 deletions
diff --git a/activerecord/lib/active_record/associations/collection_association.rb b/activerecord/lib/active_record/associations/collection_association.rb
index 9a2900843e..ff0fbe932b 100644
--- a/activerecord/lib/active_record/associations/collection_association.rb
+++ b/activerecord/lib/active_record/associations/collection_association.rb
@@ -370,7 +370,7 @@ module ActiveRecord
if record.new_record?
include_in_memory?(record)
else
- loaded? ? target.include?(record) : scope.exists?(record)
+ loaded? ? target.include?(record) : scope.exists?(record.id)
end
else
false
diff --git a/activerecord/lib/active_record/relation/finder_methods.rb b/activerecord/lib/active_record/relation/finder_methods.rb
index 1ba7fc47c0..180bc64e3a 100644
--- a/activerecord/lib/active_record/relation/finder_methods.rb
+++ b/activerecord/lib/active_record/relation/finder_methods.rb
@@ -1,3 +1,5 @@
+require 'active_support/deprecation'
+
module ActiveRecord
module FinderMethods
ONE_AS_ONE = '1 AS one'
@@ -280,7 +282,12 @@ module ActiveRecord
# Person.exists?(false)
# Person.exists?
def exists?(conditions = :none)
- conditions = conditions.id if Base === conditions
+ if Base === conditions
+ conditions = conditions.id
+ ActiveSupport::Deprecation.warn "You are passing an instance of ActiveRecord::Base to `exists?`." \
+ "Please pass the id of the object by calling `.id`"
+ end
+
return false if !conditions
relation = apply_join_dependency(self, construct_join_dependency)