Validation of property with EmailAddressAttribute fails on empty

Validation of property with EmailAddressAttribute fails on empty value

josephmartin

Vote:

When a string property is decorated with an EmailAddressAttribute validation fails when removing the address. This occurs on a fresh Alloy site with all the latest updates.

How to reproduce:

Create a new Alloy site
Add a string property with EmailAddressAttribute to a content type, I used ContactBlock and added:
- [Display(Order = 30), EmailAddress]
- public virtual string Email { get; set; }
Create a block in the CMS, set an email address, and publish
Edit the block and erase the email address

Here validation fails with: The Email field is not a valid e-mail address.

Sent via Dojo to the server in the post body is: {"id":"113_116","properties":{"email":"\"\""},"action":513}

As an editor this can be worked around by leaving the property blank, switching to another property and changing that after which validation succeeds and nothing is sent for the property.

Is this a known bug? Is there a fix available?

#205043

Jun 27, 2019 6:43

Ravindra S. Rathore

Vote:

Hi Joseph,

I don't know that this is known bug or not but you can create your custom Validation attribute and use that, instead of this.

public class CustomEmailAddressAttribute : DataTypeAttribute
    {
        private static readonly Regex ValidationRegex = new Regex(@"^((([a-z]|\d|[!#\$%&'\*\+\-\/=\?\^_`{\|}~]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])+(\.([a-z]|\d|[!#\$%&'\*\+\-\/=\?\^_`{\|}~]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])+)*)|((\x22)((((\x20|\x09)*(\x0d\x0a))?(\x20|\x09)+)?(([\x01-\x08\x0b\x0c\x0e-\x1f\x7f]|\x21|[\x23-\x5b]|[\x5d-\x7e]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(\\([\x01-\x09\x0b\x0c\x0d-\x7f]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]))))*(((\x20|\x09)*(\x0d\x0a))?(\x20|\x09)+)?(\x22)))@((([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.)+(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.?$", RegexOptions.Compiled | RegexOptions.ExplicitCapture | RegexOptions.IgnoreCase);
        
        public EmailAddressAttribute() : base(DataType.EmailAddress)
        {
        }

        public override bool IsValid(object value)
        {
            if (string.IsNullOrEmpty(value))
            {
                return true;
            }
            return ((value is string input) && (ValidationRegex.Match(input).Length > 0));
        }
}

Thanks

Ravindra

#205049

Jun 27, 2019 9:15

Praful Jangid

Vote:

You can try this quick fix suggested by Jake

https://world.episerver.com/forum/developer-forum/-Episerver-75-CMS/Thread-Container/2019/3/validation-of-property-with-emailaddressattribute-fails-on-empty-value/

Or, log a bug to episerver support (if not already).

#205052

Jun 27, 2019 10:19

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Validation of property with EmailAddressAttribute fails on empty value