1 files changed, 3 insertions, 6 deletions
diff --git a/activerecord/lib/active_record/relation/spawn_methods.rb b/activerecord/lib/active_record/relation/spawn_methods.rb
index 57d66bce4b..5c3318651a 100644
--- a/activerecord/lib/active_record/relation/spawn_methods.rb
+++ b/activerecord/lib/active_record/relation/spawn_methods.rb
@@ -10,7 +10,7 @@ module ActiveRecord
       clone
     end
 
-    # Merges in the conditions from <tt>other</tt>, if <tt>other</tt> is an <tt>ActiveRecord::Relation</tt>.
+    # Merges in the conditions from <tt>other</tt>, if <tt>other</tt> is an ActiveRecord::Relation.
     # Returns an array representing the intersection of the resulting records with <tt>other</tt>, if <tt>other</tt> is an array.
     #   Post.where(published: true).joins(:comments).merge( Comment.where(spam: false) )
     #   # Performs a single join query with both where conditions.
@@ -32,7 +32,7 @@ module ActiveRecord
       elsif other
         spawn.merge!(other)
       else
-        self
+        raise ArgumentError, "invalid argument: #{other.inspect}."
       end
     end
 
@@ -58,16 +58,13 @@ module ActiveRecord
     #   Post.order('id asc').only(:where)         # discards the order condition
     #   Post.order('id asc').only(:where, :order) # uses the specified order
     def only(*onlies)
-      if onlies.any? { |o| o == :where }
-        onlies << :bind
-      end
       relation_with values.slice(*onlies)
     end
 
     private
 
       def relation_with(values) # :nodoc:
-        result = Relation.create(klass, table, values)
+        result = Relation.create(klass, table, predicate_builder, values)
         result.extend(*extending_values) if extending_values.any?
         result
       end