7 files changed, 9 insertions, 9 deletions
diff --git a/activemodel/lib/active_model/attribute_assignment.rb b/activemodel/lib/active_model/attribute_assignment.rb
index 217bf1ac01..f0e3458f51 100644
--- a/activemodel/lib/active_model/attribute_assignment.rb
+++ b/activemodel/lib/active_model/attribute_assignment.rb
@@ -27,7 +27,7 @@ module ActiveModel
     #   cat.status # => 'sleeping'
     def assign_attributes(new_attributes)
       if !new_attributes.respond_to?(:stringify_keys)
-        raise ArgumentError, "When assigning attributes, you must pass a hash as an argument."
+        raise ArgumentError, "When assigning attributes, you must pass a hash as an argument, #{new_attributes.class} passed."
       end
       return if new_attributes.empty?
 
diff --git a/activemodel/lib/active_model/attribute_methods.rb b/activemodel/lib/active_model/attribute_methods.rb
index 888a431e5f..1ad9071cc2 100644
--- a/activemodel/lib/active_model/attribute_methods.rb
+++ b/activemodel/lib/active_model/attribute_methods.rb
@@ -369,7 +369,7 @@ module ActiveModel
             "define_method(:'#{name}') do |*args|"
           end
 
-          extra = (extra.map!(&:inspect) << "*args").join(", ".freeze)
+          extra = (extra.map!(&:inspect) << "*args").join(", ")
 
           target = if CALL_COMPILABLE_REGEXP.match?(send)
             "#{"self." unless include_private}#{send}(#{extra})"
diff --git a/activemodel/lib/active_model/attributes.rb b/activemodel/lib/active_model/attributes.rb
index 5bf213d593..41fe5168f3 100644
--- a/activemodel/lib/active_model/attributes.rb
+++ b/activemodel/lib/active_model/attributes.rb
@@ -29,7 +29,7 @@ module ActiveModel
       private
 
         def define_method_attribute=(name)
-          safe_name = name.unpack1("h*".freeze)
+          safe_name = name.unpack1("h*")
           ActiveModel::AttributeMethods::AttrNames.set_name_cache safe_name, name
 
           generated_attribute_methods.module_eval <<-STR, __FILE__, __LINE__ + 1
diff --git a/activemodel/lib/active_model/conversion.rb b/activemodel/lib/active_model/conversion.rb
index cdc1282817..82713ddc81 100644
--- a/activemodel/lib/active_model/conversion.rb
+++ b/activemodel/lib/active_model/conversion.rb
@@ -103,7 +103,7 @@ module ActiveModel
         @_to_partial_path ||= begin
           element = ActiveSupport::Inflector.underscore(ActiveSupport::Inflector.demodulize(name))
           collection = ActiveSupport::Inflector.tableize(name)
-          "#{collection}/#{element}".freeze
+          "#{collection}/#{element}"
         end
       end
     end
diff --git a/activemodel/lib/active_model/naming.rb b/activemodel/lib/active_model/naming.rb
index 983401801f..bf23fa3c05 100644
--- a/activemodel/lib/active_model/naming.rb
+++ b/activemodel/lib/active_model/naming.rb
@@ -209,7 +209,7 @@ module ActiveModel
     private
 
       def _singularize(string)
-        ActiveSupport::Inflector.underscore(string).tr("/".freeze, "_".freeze)
+        ActiveSupport::Inflector.underscore(string).tr("/", "_")
       end
   end
 
@@ -252,7 +252,7 @@ module ActiveModel
     #   Person.model_name.plural   # => "people"
     def model_name
       @_model_name ||= begin
-        namespace = parents.detect do |n|
+        namespace = module_parents.detect do |n|
           n.respond_to?(:use_relative_model_naming?) && n.use_relative_model_naming?
         end
         ActiveModel::Name.new(self, namespace)
diff --git a/activemodel/lib/active_model/type/string.rb b/activemodel/lib/active_model/type/string.rb
index 36f13945b1..a9c9bfadb6 100644
--- a/activemodel/lib/active_model/type/string.rb
+++ b/activemodel/lib/active_model/type/string.rb
@@ -16,8 +16,8 @@ module ActiveModel
         def cast_value(value)
           case value
           when ::String then ::String.new(value)
-          when true then "t".freeze
-          when false then "f".freeze
+          when true then "t"
+          when false then "f"
           else value.to_s
           end
         end
diff --git a/activemodel/lib/active_model/validations/validates.rb b/activemodel/lib/active_model/validations/validates.rb
index 88cca318ef..21c4ce0dfe 100644
--- a/activemodel/lib/active_model/validations/validates.rb
+++ b/activemodel/lib/active_model/validations/validates.rb
@@ -116,7 +116,7 @@ module ActiveModel
           key = "#{key.to_s.camelize}Validator"
 
           begin
-            validator = key.include?("::".freeze) ? key.constantize : const_get(key)
+            validator = key.include?("::") ? key.constantize : const_get(key)
           rescue NameError
             raise ArgumentError, "Unknown validator: '#{key}'"
           end