ActiveModel Detailed Errors

This is just a temporary gem to bring this feature that is scheduled for Rails 5 to the ancient world of Rails 4. This is a blatant copy and paste of that PR so full forward compatibility is ensured.

ActiveModel Detailed Errors is no longer maintained.

• We will leave the Issues open as a discussion forum only.
• We do not guarantee a response from us in the Issues.
• We are no longer accepting pull requests.

What this does?

If you didn't read the PR, this is a fix to what ActiveModel#Error does. When you validate something, you get errors wrapped in this object. In Rails 3 and 4, this object just contained a simple string with the message of the validation. That was a very limited behavior because when you did this:

errors.add(:base, :not_enough_monkeys, count: 100)

Rails just saved the errors as this (or something similar because it depends on your localization files):

model.errors
{ base: ["Not Enough Monkeys. Maximum: 100"] }
# and nothing anymore...

It coupled internationalization with errors. You can't give a programmers a string, buddy! We need objects and data, not strings!

So, that PR fixed this by storing the error as it is too, in the method details. So you can do this now:

model.errors.details
{ base: [{ error: :not_enough_monkeys, count: 100 }] }

So you get two things if you make apis that should be translated in the client:

• You have objects! (Your api consumers will love you)
• You don't need to use i18n for format api errors. You can have an admin interface with good error messages now!

Installation

As with all the other gems you used before, add it to your Gemfile:

gem "activemodel_detailed_errors"

And END.

License

The gem is available as open source under the terms of the MIT License.