How to alias the columns names to change the name on error_messages_for ?

rubyonrails-talk
1

Yeah,

How can i alias the columns names to show another string name in error_messages_for?

class CreateUsers < ActiveRecord::Migration def self.up create_table :users do |t| t.column :pizza, :string

I want to show ‘salame’

Thanks for your attention!

2

This is what I have done in the past, but it may not be the best solution. In your user model…

class User < ActiveRecord::Base

def beautifunction { :pizza => ‘salame’ }

end

def self.human_attribute_name(s) beautifunction[s.to_sym] || super(s) end

end

Best regards. Anna Lissa

3

one correction to my solution:

use self.beautifunction (should be a class method not an instance method)

– Anna Lissa

4

Thanks! This really works. But what’s the Rails way?

Regards, Luiz Vitor

5

That’s a good question. As far as I can tell, there is no Rails way to do this as of Rails 2.0.2. I spent some time reviewing how error_messages_for works and then came up with this solution. I would love to know if 2.1 addresses the problem, or if we’re really looking at a documentation problem.

Regards, Anna Lissa

6

I use the Human Attribute Override plugin (http:// agilewebdevelopment.com/plugins/human_attribute_override) with Rails 2.0 which essentially does the same thing as your earlier example.

Just committed this month is a patch (http://rails.lighthouseapp.com/ projects/8994/tickets/535-humanize-inflections) that allows you to specify particular results for the humanize string method. I think it's a flawed approach because it is not unreasonable to have the same attribute name on different models but to want different display names and I as far as I can see it will not allow that.

Best regards, Andrew