I want to add a custom validator in one of Model. For example Rails has inbuilt validation methods like validates_uniqueness_of, validates_presence_of . What I need is a similar kind of method (example: validates_line_items), that can run my custom code while saving, updating the record and can add custom error messages to the record. Please help me by suggesting how i can do this. -- Posted via http://www.ruby-forum.com/. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
You should probably purchase ''Agile Development with Ruby on
Rails'' from
http://www.pragmaticprogrammer.com/. It explains clearly how to use the
in built model methods;
validate
validate_on_create
validate_on_update
In these methods you can place any logic you want & add to the model
error object like so:
errors.add(:field_name, "error message")
or
errors.add_to_base("error message")
Dipesh Batheja wrote:> I want to add a custom validator in one of Model. For example Rails has
> inbuilt validation methods like validates_uniqueness_of,
> validates_presence_of . What I need is a similar kind of method
> (example: validates_line_items), that can run my custom code while
> saving, updating the record and can add custom error messages to the
> record. Please help me by suggesting how i can do this.
--
Posted via http://www.ruby-forum.com/.
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Have a look at validates_each. That allows you to perform validation
on an attribute (or attributes) with custom code.
validates_each :your_attribute do |model_instance, attribute, value|
# your
validation code here checking the value
end
-Michael
http://javathehutt.blogspot.com
On Dec 10, 2006, at 11:54 PM, Dipesh Batheja wrote:
>
> I want to add a custom validator in one of Model. For example Rails
> has
> inbuilt validation methods like validates_uniqueness_of,
> validates_presence_of . What I need is a similar kind of method
> (example: validates_line_items), that can run my custom code while
> saving, updating the record and can add custom error messages to the
> record. Please help me by suggesting how i can do this.
>
> --
> Posted via http://www.ruby-forum.com/.
>
> >
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