3 files changed, 14 insertions, 5 deletions
diff --git a/activerecord/lib/active_record/enum.rb b/activerecord/lib/active_record/enum.rb
index 9ad718a02a..d1bc785bee 100644
--- a/activerecord/lib/active_record/enum.rb
+++ b/activerecord/lib/active_record/enum.rb
@@ -87,6 +87,9 @@ module ActiveRecord
           # def status() STATUS.key self[:status] end
           define_method(name) { enum_values.key self[name] }
 
+          # def status_before_type_cast() STATUS.key self[:status] end
+          define_method("#{name}_before_type_cast") { enum_values.key self[name] }
+
           pairs = values.respond_to?(:each_pair) ? values.each_pair : values.each_with_index
           pairs.each do |value, i|
             enum_values[value] = i
diff --git a/activerecord/lib/active_record/persistence.rb b/activerecord/lib/active_record/persistence.rb
index 4669c072a1..460fbdb3f8 100644
--- a/activerecord/lib/active_record/persistence.rb
+++ b/activerecord/lib/active_record/persistence.rb
@@ -196,7 +196,11 @@ module ActiveRecord
     # share the same set of attributes.
     def becomes!(klass)
       became = becomes(klass)
-      became.public_send("#{klass.inheritance_column}=", klass.sti_name) unless self.class.descends_from_active_record?
+      sti_type = nil
+      if !klass.descends_from_active_record?
+        sti_type = klass.sti_name
+      end
+      became.public_send("#{klass.inheritance_column}=", sti_type)
       became
     end
 
diff --git a/activerecord/lib/active_record/relation/query_methods.rb b/activerecord/lib/active_record/relation/query_methods.rb
index 7571208a88..0f5fe7ea51 100644
--- a/activerecord/lib/active_record/relation/query_methods.rb
+++ b/activerecord/lib/active_record/relation/query_methods.rb
@@ -858,11 +858,11 @@ module ActiveRecord
       end
 
       single_val_method = Relation::SINGLE_VALUE_METHODS.include?(scope)
-      unscope_code = :"#{scope}_value#{'s' unless single_val_method}="
+      unscope_code = "#{scope}_value#{'s' unless single_val_method}="
 
       case scope
       when :order
-        self.send(:reverse_order_value=, false)
+        self.reverse_order_value = false
         result = []
       else
         result = [] unless single_val_method
@@ -872,17 +872,19 @@ module ActiveRecord
     end
 
     def where_unscoping(target_value)
-      target_value_sym = target_value.to_sym
+      target_value = target_value.to_s
 
       where_values.reject! do |rel|
         case rel
         when Arel::Nodes::In, Arel::Nodes::NotIn, Arel::Nodes::Equality, Arel::Nodes::NotEqual
           subrelation = (rel.left.kind_of?(Arel::Attributes::Attribute) ? rel.left : rel.right)
-          subrelation.name.to_sym == target_value_sym
+          subrelation.name == target_value
         else
           raise "unscope(where: #{target_value.inspect}) failed: unscoping #{rel.class} is unimplemented."
         end
       end
+
+      bind_values.reject! { |col,_| col.name == target_value }
     end
 
     def custom_join_ast(table, joins)