7 files changed, 23 insertions, 16 deletions
diff --git a/activemodel/lib/active_model/errors.rb b/activemodel/lib/active_model/errors.rb
index d106f65fa2..696e6d31da 100644
--- a/activemodel/lib/active_model/errors.rb
+++ b/activemodel/lib/active_model/errors.rb
@@ -310,9 +310,9 @@ module ActiveModel
     # <tt>:strict</tt> option can also be set to any other exception.
     #
     #   person.errors.add(:name, :invalid, strict: true)
-    #   # => ActiveModel::StrictValidationFailed: name is invalid
+    #   # => ActiveModel::StrictValidationFailed: Name is invalid
     #   person.errors.add(:name, :invalid, strict: NameIsInvalid)
-    #   # => NameIsInvalid: name is invalid
+    #   # => NameIsInvalid: Name is invalid
     #
     #   person.errors.messages # => {}
     #
@@ -526,7 +526,20 @@ module ActiveModel
   class StrictValidationFailed < StandardError
   end
 
+  # Raised when attribute values are out of range.
+  class RangeError < ::RangeError
+  end
+
   # Raised when unknown attributes are supplied via mass assignment.
+  #
+  #   class Person
+  #     include ActiveModel::AttributeAssignment
+  #     include ActiveModel::Validations
+  #   end
+  #
+  #   person = Person.new
+  #   person.assign_attributes(name: 'Gorby')
+  #   # => ActiveModel::UnknownAttributeError: unknown attribute 'name' for Person.
   class UnknownAttributeError < NoMethodError
     attr_reader :record, :attribute
 
diff --git a/activemodel/lib/active_model/gem_version.rb b/activemodel/lib/active_model/gem_version.rb
index 62862aa4e9..4a8ee915cf 100644
--- a/activemodel/lib/active_model/gem_version.rb
+++ b/activemodel/lib/active_model/gem_version.rb
@@ -6,9 +6,9 @@ module ActiveModel
 
   module VERSION
     MAJOR = 5
-    MINOR = 0
+    MINOR = 1
     TINY  = 0
-    PRE   = "beta3"
+    PRE   = "alpha"
 
     STRING = [MAJOR, MINOR, TINY, PRE].compact.join(".")
   end
diff --git a/activemodel/lib/active_model/type/integer.rb b/activemodel/lib/active_model/type/integer.rb
index 2f73ede009..eea2280b22 100644
--- a/activemodel/lib/active_model/type/integer.rb
+++ b/activemodel/lib/active_model/type/integer.rb
@@ -46,7 +46,7 @@ module ActiveModel
 
       def ensure_in_range(value)
         unless range.cover?(value)
-          raise RangeError, "#{value} is out of range for #{self.class} with limit #{_limit}"
+          raise ActiveModel::RangeError, "#{value} is out of range for #{self.class} with limit #{_limit}"
         end
       end
 
diff --git a/activemodel/lib/active_model/validations/acceptance.rb b/activemodel/lib/active_model/validations/acceptance.rb
index c5c0cd4636..a04e5f347e 100644
--- a/activemodel/lib/active_model/validations/acceptance.rb
+++ b/activemodel/lib/active_model/validations/acceptance.rb
@@ -64,11 +64,7 @@ module ActiveModel
         private
 
         def convert_to_reader_name(method_name)
-          attr_name = method_name.to_s
-          if attr_name.end_with?("=")
-            attr_name = attr_name[0..-2]
-          end
-          attr_name
+          method_name.to_s.chomp('=')
         end
       end
     end
diff --git a/activemodel/lib/active_model/validations/callbacks.rb b/activemodel/lib/active_model/validations/callbacks.rb
index 52111e5442..a201f72ed0 100644
--- a/activemodel/lib/active_model/validations/callbacks.rb
+++ b/activemodel/lib/active_model/validations/callbacks.rb
@@ -29,8 +29,7 @@ module ActiveModel
       end
 
       module ClassMethods
-        # Defines a callback that will get called right before validation
-        # happens.
+        # Defines a callback that will get called right before validation.
         #
         #   class Person
         #     include ActiveModel::Validations
@@ -65,8 +64,7 @@ module ActiveModel
           set_callback(:validation, :before, *args, &block)
         end
 
-        # Defines a callback that will get called right after validation
-        # happens.
+        # Defines a callback that will get called right after validation.
         #
         #   class Person
         #     include ActiveModel::Validations
diff --git a/activemodel/lib/active_model/validations/numericality.rb b/activemodel/lib/active_model/validations/numericality.rb
index ad7012df48..9a0a0655de 100644
--- a/activemodel/lib/active_model/validations/numericality.rb
+++ b/activemodel/lib/active_model/validations/numericality.rb
@@ -120,7 +120,7 @@ module ActiveModel
       # * <tt>:only_integer</tt> - Specifies whether the value has to be an
       #   integer, e.g. an integral value (default is +false+).
       # * <tt>:allow_nil</tt> - Skip validation if attribute is +nil+ (default is
-      #   +false+). Notice that for fixnum and float columns empty strings are
+      #   +false+). Notice that for Integer and Float columns empty strings are
       #   converted to +nil+.
       # * <tt>:greater_than</tt> - Specifies the value must be greater than the
       #   supplied value.
diff --git a/activemodel/lib/active_model/validator.rb b/activemodel/lib/active_model/validator.rb
index 109bf038b0..699f74ed17 100644
--- a/activemodel/lib/active_model/validator.rb
+++ b/activemodel/lib/active_model/validator.rb
@@ -100,7 +100,7 @@ module ActiveModel
     #   PresenceValidator.kind   # => :presence
     #   UniquenessValidator.kind # => :uniqueness
     def self.kind
-      @kind ||= name.split('::').last.underscore.sub(/_validator$/, '').to_sym unless anonymous?
+      @kind ||= name.split('::').last.underscore.chomp('_validator').to_sym unless anonymous?
     end
 
     # Accepts options that will be made available through the +options+ reader.