Rails - Dec 2007 - Validating date_select invalid dates

Hi,

I''m trying to validate a invalid date like Feb 31, 1976 but
I''m
getting a really weird error msg and I can''t figure out how to fix it.
I thought that using validates_multiparameter_assignments it would
handle any invalid date posted but it is not working. Everytime that I
try I get:

You have a nil object when you didn''t expect it!
The error occurred while evaluating nil.>

#{RAILS_ROOT}/app/models/spec.rb:19
#{RAILS_ROOT}/app/controllers/spec_controller.rb:16:in `edit''
/Applications/Locomotive2/Bundles/standardRailsMar2007.locobundle/i386/
bin/mongrel_rails:16:in `load''
/Applications/Locomotive2/Bundles/standardRailsMar2007.locobundle/i386/
bin/mongrel_rails:16

but birthdate is not nil!!

If I try with a valid date everything will work perfectly.

below I''m pasting my controller and view code

class Spec < ActiveRecord::Base

	belongs_to :user
	acts_as_ferret

	ALL_FIELDS = %w(first_name last_name address phone gender birthdate
city state zip_code)
	STRING_FIELDS = %w(first_name last_name address phone city state)
	VALID_GENDERS = ["Male", "Female"]
	START_YEAR = 1900
	END_YEAR = Date.today.year - 18
	ZIP_CODE_LENGTH = 10

	
validates_presence_of :zip_code, :birthdate, :first_name, :last_name, :phone,
:city, :state, :country
	validates_length_of STRING_FIELDS, :maximum => DB_STRING_MAX_LENGTH
	validates_inclusion_of :gender, :in => VALID_GENDERS, :allow_nil =>
true, :message => "must be male or female"
	validates_multiparameter_assignments :message => " is not a valid
date."
	validates_each :birthdate do |record, attr, value|
		puts value.class
        record.errors.add attr, "is not a valid date. You must be at
least 18 years old to sign in." if value > Date.new((Date.today.year -
18),(Date.today.month),(Date.today.day))
    end
end

<% form_for :spec do |form| %>
<fieldset>
	<legend><%= "edit #{@user.screen_name} profile"
%></legend>

	<%= error_messages_for ''spec'' %>
    <%= field_for("text", form, "first_name")%>
    <%= field_for("text", form, "last_name") %>
    <div class="form_row">
    	<label for="gender">Gender:</label>
    	<%= radio_button(:spec, :gender, "Male") %> Male
    	<%= radio_button(:spec, :gender, "Female") %> Female
    </div>
    <div class="form_row">
    	<label for="birthdate">Birthdate:</label>
    	<%= date_select :spec, :birthdate,
                           :start_year => Spec::END_YEAR,
                           :end_year => Spec::START_YEAR,
                           :order => [:month, :day, :year] %>
    </div>
    <%= field_for("text", form, "phone") %>
    <%= field_for("text", form, "address") %>
    <%= field_for("text", form, "city") %>
    <%= field_for("text", form, "state") %>
    <%= field_for("text", form, "country") %>
    <%= field_for("text", form, "zip_code",
Spec::ZIP_CODE_LENGTH,
Spec::ZIP_CODE_LENGTH) %>

    <%= submit_tag "Update", :class => "submit" %>
</fieldset>
<% end %>

Thanks,
Thiago Guerra
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I''m having the same problem! My date_select(''days''
field returns
standard 31 days) in the view can return also invalid dates like 31
februari. There is a plugin to have it return an errormessage

http://agilewebdevelopment.com/plugins/validates_multiparameter_assignments

But that''s totally not what I want and how it should be, is it?

I want the invalid dates to dissapear! Anyone know a solution?





On 4 dec 2007, 17:25, Thiago Guerra
<thiag...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> Hi,
>
> I''m trying to validate a invalid date like Feb 31, 1976 but
I''m
> getting a really weird error msg and I can''t figure out how to fix
it.
> I thought that using validates_multiparameter_assignments it would
> handle any invalid date posted but it is not working. Everytime that I
> try I get:
>
> You have a nil object when you didn''t expect it!
> The error occurred while evaluating nil.>
>
> #{RAILS_ROOT}/app/models/spec.rb:19
> #{RAILS_ROOT}/app/controllers/spec_controller.rb:16:in `edit''
> /Applications/Locomotive2/Bundles/standardRailsMar2007.locobundle/i386/
> bin/mongrel_rails:16:in `load''
> /Applications/Locomotive2/Bundles/standardRailsMar2007.locobundle/i386/
> bin/mongrel_rails:16
>
> but birthdate is not nil!!
>
> If I try with a valid date everything will work perfectly.
>
> below I''m pasting my controller and view code
>
> class Spec < ActiveRecord::Base
>
>         belongs_to :user
>         acts_as_ferret
>
>         ALL_FIELDS = %w(first_name last_name address phone gender birthdate
> city state zip_code)
>         STRING_FIELDS = %w(first_name last_name address phone city state)
>         VALID_GENDERS = ["Male", "Female"]
>         START_YEAR = 1900
>         END_YEAR = Date.today.year - 18
>         ZIP_CODE_LENGTH = 10
>
> validates_presence_of :zip_code, :birthdate, :first_name, :last_name,
:phone, :city, :state, :country
>         validates_length_of STRING_FIELDS, :maximum =>
DB_STRING_MAX_LENGTH
>         validates_inclusion_of :gender, :in => VALID_GENDERS, :allow_nil
=>
> true, :message => "must be male or female"
>         validates_multiparameter_assignments :message => " is not a
valid
> date."
>         validates_each :birthdate do |record, attr, value|
>                 puts value.class
>         record.errors.add attr, "is not a valid date. You must be at
> least 18 years old to sign in." if value >
Date.new((Date.today.year -
> 18),(Date.today.month),(Date.today.day))
>     end
> end
>
> <% form_for :spec do |form| %>
> <fieldset>
>         <legend><%= "edit #...@user.screen_name}
profile" %></legend>
>
>         <%= error_messages_for ''spec'' %>
>     <%= field_for("text", form, "first_name")%>
>     <%= field_for("text", form, "last_name") %>
>     <div class="form_row">
>         <label for="gender">Gender:</label>
>         <%= radio_button(:spec, :gender, "Male") %> Male
>         <%= radio_button(:spec, :gender, "Female") %>
Female
>     </div>
>     <div class="form_row">
>         <label for="birthdate">Birthdate:</label>
>         <%= date_select :spec, :birthdate,
>                            :start_year => Spec::END_YEAR,
>                            :end_year => Spec::START_YEAR,
>                            :order => [:month, :day, :year] %>
>     </div>
>     <%= field_for("text", form, "phone") %>
>     <%= field_for("text", form, "address") %>
>     <%= field_for("text", form, "city") %>
>     <%= field_for("text", form, "state") %>
>     <%= field_for("text", form, "country") %>
>     <%= field_for("text", form, "zip_code",
Spec::ZIP_CODE_LENGTH,
> Spec::ZIP_CODE_LENGTH) %>
>
>     <%= submit_tag "Update", :class => "submit"
%>
> </fieldset>
> <% end %>
>
> Thanks,
> Thiago Guerra
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