Rails - Sep 2009 - customize active record attribute display name in error message

Is there an easy way to customize the display name of the attributed
used in a validation error message.  For example, let''s say I have an
active record with the attribute :msg that is validated for presence.
If is doesn''t exist I don''t want the user to see "msg
can''t be
blank!"  I want it to say "Message can''t be blank!"  Is
there an easy
way to do that?

Hi drewB,

You can change the "humanized" version of that symbol when
it''s
accessed via human_attribute_name.

Try this:

class Post < ActiveRecord::Base

  HUMANIZED_COLUMNS = {:msg => "Message"}

  def self.human_attribute_name(attribute)
    HUMANIZED_COLUMNS[attribute.to_sym] || super
  end
end

HTH,
Richard


On Sep 25, 4:49 pm, drewB
<dbats...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> Is there an easy way to customize the display name of the attributed
> used in a validation error message.  For example, let''s say I have
an
> active record with the attribute :msg that is validated for presence.
> If is doesn''t exist I don''t want the user to see
"msg can''t be
> blank!"  I want it to say "Message can''t be blank!"
 Is there an easy
> way to do that?

I responded just a bit ago, but I don''t see my response, so hopefully
there won''t be two responses...

Essentially, Drew, you can map the column to be something else when
you call "humanize" on it.  Try this:

class Post < ActiveRecord::Base

  HUMANIZED_COLUMNS = {:msg => "Message"}

  def self.human_attribute_name(attribute)
    HUMANIZED_COLUMNS[attribute.to_sym] || super
  end
end

HTH,
Richard

On Sep 25, 4:49 pm, drewB
<dbats...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> Is there an easy way to customize the display name of the attributed
> used in a validation error message.  For example, let''s say I have
an
> active record with the attribute :msg that is validated for presence.
> If is doesn''t exist I don''t want the user to see
"msg can''t be
> blank!"  I want it to say "Message can''t be blank!"
 Is there an easy
> way to do that?

On Fri, Sep 25, 2009 at 4:49 PM, drewB
<dbatshaw-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
>
> Is there an easy way to customize the display name of the attributed
> used in a validation error message.  For example, let''s say I have
an
> active record with the attribute :msg that is validated for presence.
> If is doesn''t exist I don''t want the user to see
"msg can''t be
> blank!"  I want it to say "Message can''t be blank!"
 Is there an easy
> way to do that?
Have you read the validation documentation?

All of the Rails validators support a :message option, for example
look at validates_presence_of:

http://api.rubyonrails.org/classes/ActiveRecord/Validations/ClassMethods.html#M002164

See where it says "message - A custom error message (default is:
"can‘t be blank")." ?  That means when you write

validates_presence_of :foo, :message => "Message can''t be
blank!"

-- 
Greg Donald
http://destiney.com/

I am aware of the :message option.  What I was hoping to do is be able
to use many of the default messages and just change the attribute name
displayed.  For example, something like:

attr_display_name :msg "Message"

On Sep 25, 3:31 pm, Greg Donald
<gdon...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> On Fri, Sep 25, 2009 at 4:49 PM, drewB
<dbats...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
> > Is there an easy way to customize the display name of the attributed
> > used in a validation error message.  For example, let''s say I
have an
> > active record with the attribute :msg that is validated for presence.
> > If is doesn''t exist I don''t want the user to see
"msg can''t be
> > blank!"  I want it to say "Message can''t be
blank!"  Is there an easy
> > way to do that?
>
> Have you read the validation documentation?
>
> All of the Rails validators support a :message option, for example
> look at validates_presence_of:
>
> http://api.rubyonrails.org/classes/ActiveRecord/Validations/ClassMeth...
>
> See where it says "message - A custom error message (default is:
> "can‘t be blank")." ?  That means when you write
>
> validates_presence_of :foo, :message => "Message can''t be
blank!"
>
> --
> Greg Donaldhttp://destiney.com/

I responded just a bit ago, but I don''t see my response, so hopefully
there
won''t be two responses...

Essentially, Drew, you can map the column to be something else when you call
"humanize" on it.  Try this:

class Post < ActiveRecord::Base

  HUMANIZED_COLUMNS = {:msg => "Message"}

  def self.human_attribute_name(attribute)
    HUMANIZED_COLUMNS[attribute.to_sym] || super
  end
end

HTH,
Richard

On Fri, Sep 25, 2009 at 4:49 PM, drewB
<dbatshaw-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
> Is there an easy way to customize the display name of the attributed
> used in a validation error message.  For example, let''s say I have
an
> active record with the attribute :msg that is validated for presence.
> If is doesn''t exist I don''t want the user to see
"msg can''t be
> blank!"  I want it to say "Message can''t be blank!"
Is there an easy
> way to do that?
> >
>
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That is exactly what I was looking for!  Thank you!

On Sep 25, 3:17 pm, richardun
<richar...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> I responded just a bit ago, but I don''t see my response, so
hopefully
> there won''t be two responses...
>
> Essentially, Drew, you can map the column to be something else when
> you call "humanize" on it.  Try this:
>
> class Post < ActiveRecord::Base
>
>   HUMANIZED_COLUMNS = {:msg => "Message"}
>
>   def self.human_attribute_name(attribute)
>     HUMANIZED_COLUMNS[attribute.to_sym] || super
>   end
> end
>
> HTH,
> Richard
>
> On Sep 25, 4:49 pm, drewB
<dbats...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
> > Is there an easy way to customize the display name of the attributed
> > used in a validationerrormessage.  For example, let''s say I
have an
> > active record with the attribute :msg that is validated for presence.
> > If is doesn''t exist I don''t want the user to see
"msg can''t be
> > blank!"  I want it to say "Messagecan''t be
blank!"  Is there an easy
> > way to do that?

Hi
    I was just trying this  My models and relations are as
company has_many users
user belongs_to company

      And when saving a user a company is also saved So in user model I 
have
validates_associated :company

         The solution works perfectly for user model attributes. But it 
is not working for company attributes. For example in companies table i 
have address_city field And as the solution suggests I add to company 
model below code

HUMANIZED_COLUMNS = {:address_city => "City"}

  def self.human_attribute_name(attribute)
    HUMANIZED_COLUMNS[attribute.to_sym] || super
  end

            But this is not working It shows Address city .But I need is 
City. Please help


Thanks
Tom
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Hi
    One more thing is ,in order to show validates_associated error 
message than the regular message "is invalid" I am using the hack in 
environment.rb like

module ActiveRecord::Validations::ClassMethods
  def validates_associated(*associations)
      associations.each do |association|
        class_eval do
          validates_each(associations) do |record, associate_name, 
value|
            associates = record.send(associate_name)
            associates = [associates] unless 
associates.respond_to?(''each'')
            associates.each do |associate|
              if associate && !associate.valid?
                associate.errors.each do |key, value|
                  record.errors.add(key, value)
                end
              end
            end
          end
        end
      end
  end
end
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I could solve the problem the following way. But I dont know whether 
this the right approach.Please correct if wrong
> module ActiveRecord::Validations::ClassMethods
>   def validates_associated(*associations)
>       associations.each do |association|
>         class_eval do
>           validates_each(associations) do |record, associate_name, 
> value|
>             associates = record.send(associate_name)
>             associates = [associates] unless 
> associates.respond_to?(''each'')
>             associates.each do |associate|
>               if associate && !associate.valid?
>                 associate.errors.each do |key, value|
                    humanized_columns = {:address_city => 
"City",:phone_oofice => "Office Phone Number"}
                    record.errors.add(key, value,{:attribute => 
humanized[key.to_sym] ||
human_attribute_name(key.to_s)})
>                 end
>               end
>             end
>           end
>         end
>       end
>   end
> end

Thanks
Tom
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I would just like to add that those who uses I18n can easily add these 
model "translations" to the localization file like so:

en:
  activerecord:
    models:
      user: "User"
      company: "Company"
    attributes:
      user:
        login: "Username"
        password. "Password"
      company:
        name: "Company name"

I prefer this method over having the HUMANIZED_COLUMNS in every model.

I18n can also be used to customize error messages, if you dont like the 
default ones (like "is invalid"). This is certanly a lot cleaner than 
hacking active record.
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Hi
 Thanks for replying back.Can you please paste a good link explains how 
to do this?

Tom
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You mean how to use I18n?
Ryan Bates has a screen cast on it:
http://railscasts.com/episodes/138-i18n
And then there''s the official I18n guide
http://guides.rubyonrails.org/i18n.html
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Sharagoz -- wrote:
> You mean how to use I18n?
> Ryan Bates has a screen cast on it:
> http://railscasts.com/episodes/138-i18n
> And then there''s the official I18n guide
> http://guides.rubyonrails.org/i18n.html
Unfortunately, Rails'' official I18N is quite cumbersome.  I highly 
recommend fast_gettext.

Best,
-- 
Marnen Laibow-Koser
http://www.marnen.org
marnen-sbuyVjPbboAdnm+yROfE0A@public.gmane.org
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