Ruby on Rails

CORRECTION:

On Monday, July 6, 2015 at 4:43:45 PM UTC-4, Elizabeth McGurty wrote:

Working with incomplete information here...

Single input, multiple values.  I do not understand why?  There are so many resources available for you to permit users to enter multiple and distinct emails values.

The following is crude, but I think that it may be helpful....

Well as far as I know you can't use

ActionView::Helpers::FormHelper :  http://api.rubyonrails.org/classes/ActionView/Helpers/FormHelper.html#method-i-email_field
email_field(object_name, method, options = {})

From the browser instance, you can introduce an onChange event on your multiple value email field with JQuery/JavaScript:

making a call to something like (just offered as psuedo code):

var my_failed_email_address = Array   // outside of the function, maybe

function validEmail(multiple_email_element_by_id)
     return_value = true;
     var emailRegex = /^[a-zA-Z0-9.!#$%&'*+\/=?^_`{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*$/;
     ///  Someone can probably suggest a better reg exp

      Use Jquery to split the multiple_email_element_by_id field value by your required delimiter(s) and put it into an array...

                var my_email_address = Array  // Use the above to populate the array
                For each element in resulting array
                   if (!( emailRegex.test(increment value) ) )  
                       return_value = true;
                  else
                     my_failed_email_address.push(that element)  // Otherwise add new value to array
                      return_value = false
                end

                  return return_value  

              end

If this returns false, then you have numerous options: you can inform the user of failed email address(es) with an alert, populate some html span/error associated with the email input with meaningful error message, or change the css on the email input....

Or you can use validation in the Controller or Model in a similar fashion

In the Controller, parse the multiple email field from params and write a method to test for validity of each.  If failure turn to originating render
In the model, make accessible your multiple_email field, and write call back to parse the field for validation.  On failure, inform user at View level with if model.errors.any?  

Liz

On Monday, July 6, 2015 at 3:52:49 PM UTC-4, StepaAr wrote:

theoretically unlimited

example picture

On Monday, July 6, 2015 at 9:46:22 PM UTC+2, Elizabeth McGurty wrote:

Predictably how many?


On Monday, July 6, 2015 at 3:04:57 PM UTC-4, StepaAr wrote:

yes.



On Monday, July 6, 2015 at 7:46:57 PM UTC+2, Elizabeth McGurty wrote:

Before I respond, are you saying that in a single input you are gathering multiple email addresses?


On Monday, July 6, 2015 at 11:58:39 AM UTC-4, StepaAr wrote:

I have a couple questions.

1) I have a couple of  emails.They are separated between  buy comma or space.How to find which one is correct? I was thinking using regular expression like this one :

/\A[\w+\-.]+@[a-z\d\-]+(\.[a-z]+)*\.[a-z]+\z/i

2)How to put valid email address  to database ?

3)If some email address is not valid then i have to give a massage using client-side which email are not valid
I was  thinking javascript.But how?I don't know to use rails and javascript