How to get the errors on Controlers

Rails
1

Now i want to get the errors of Model(like some error of
validate_xxx_of )

How can i do? it seems that no error object on Controllers by API
docments,

Thanks.

2

ModelName.errors.add(attribute, message)
ModelName.errors.add_to_base(message)

see:
http://api.rubyonrails.org/classes/ActiveRecord/Errors.html

3

Anson wrote:

Now i want to get the errors of Model(like some error of
validate_xxx_of )

How can i do? it seems that no error object on Controllers by API
docments,

Thanks.

object_name.errors will give all these type errors.

Suppose if Student is the class name,
@student = Student.new(params[:student])
@student.save

In the above code, if there is any error while saving, you can get the
errors in the controller like,

@student.errors

It will return the object of ActiveRecord::Errors class.

If you want to get the errors in array, you can use like,

@student.errors.full_messages

Refer the ActiveRecord::Errors class in the ROR API

  • Karthi
4

I have 2 validations on a single object, like this in my user model:

validates_length_of :password, :within => 6…12
validates_presence_of :password

When I do a unit test to ensure a missing password is responded to
correctly, for example:

@error_messages = ActiveRecord::Errors.default_error_messages
user = User.new(:name => ‘my test user’,
assert !user.valid?
assert_equal @error_messages[:blank], user.errors.on(:password)

I get a message such as:

test_create_user_passwords_missing(UserTest)
[test/unit/user_test.rb:143]:
<“can’t be blank”> expected but was
<[“is too short (minimum is 6 characters)”, “can’t be blank”]>.

I have 2 questions:

  1. Is there a way of ensuring this test passes, ie. by checking for both
    validations at once?
  2. How can I surpress or change the display of these messages in the
    views? For example, if I get the “can’t be blank” and the “is too
    short…” message, I would like to display a message saying “Please
    ensure you enter a password between 6 and 12 characters in length”.

All help appreciated!

Thanks

Mark.

Karthi kn wrote:

Anson wrote:

Now i want to get the errors of Model(like some error of
validate_xxx_of )

How can i do? it seems that no error object on Controllers by API
docments,

Thanks.

object_name.errors will give all these type errors.

Suppose if Student is the class name,
@student = Student.new(params[:student])
@student.save

In the above code, if there is any error while saving, you can get the
errors in the controller like,

@student.errors

It will return the object of ActiveRecord::Errors class.

If you want to get the errors in array, you can use like,

@student.errors.full_messages

Refer the ActiveRecord::Errors class in the ROR API

  • Karthi