Data needs to be stored in line by line

If I understood correctly, you want to store these as separate line items in the DB but have them in one paragraph field in the interface?

yes Mathieu Drouin 

Split them using the split function and then run a!forLoop() in it to construct a CDT for every item the split() function returned. 

= a!localVariables(
  local!emails: ri!emailAddresses,
  local!invalidEmails: if(
    isnull(local!emails),
    {},
    joinarray(
      reject(
        isnull(_),
        a!forEach(
          items: split(local!emails, " "),
          expression: if(
            regexmatch(
              pattern: "^[A-Z0-9\'\+\&\%_-]+(\.{0,1}[A-Z0-9\'\+\&\%_-]+)*[@]{1}[A-Z0-9.-]*[A-Z0-9-]+[.]{1}[A-Z]{2,6}$",
              searchString: fv!item,
              regexFlags: "si"
            ),
            null,
            fv!index
          )
        )
      ),
      ","
    )
  ),
  local!validation: if(
    isnull(local!invalidEmails),
    {},
    "Invalid email at " & local!invalidEmails & " position(s) "
  ),
         a!paragraphField(
                        label: "Email Addresses",
                        labelPosition: "JUSTIFIED",
                        placeholder: "Email Addresses should be one per line (can be pasted from Excel)",
                        value: ri!emailAddresses,
                        saveInto: ri!emailAddresses,
                        refreshAfter: "UNFOCUS",
                        height: "TALL",
                        required: true,
                        validations: local!validation
                      )
                      )

Hi Harshit Bumb (Appyzie)  / Konduru Chaitanya  ,this is my code where i will be pasting /entering email addresses in line by line  in paragraph field . so i want to have 2 validations where 1st validation checks for line delimiter and 2nd validation for email format .

How the emailaddresses are saved in dB  is it line by line only ?

I should pass this email addresses to an api in line by line .can you please suggest how to validate those emails and then pass it to api line by line. 

emailAddresses is one of  text field in CDT and when entering the values in paragraph field it is storing the data in rule input of that cdt as shown below

Could you please try the below changed code. Also you can create a rule to do the separation of email ids and call it in your API and as well as here to validate the email addresses. so that you don't have to worry about validating while using this string anywhere else. You can handle it in the interface and make sure the user does not submit an invalid list of email addresses. In this way you don't have to worry about how it is saving in your DB. Because users can enter in  different ways. So, I recommend make use of email identifiers such as .com to find where your text has to be broken into different parts instead of relying on spaces or any other values.

= a!localVariables(
  local!emails: ri!emailAddresses,
  local!individualMail: if(
    a!isNullOrEmpty(local!emails),
    {},
    reject(fn!isnull(_), split(local!emails, "
"))
  ),
  local!invalidEmails: substitute(
    tostring(
      reject(
        fn!isnull(_),
        a!forEach(
          items: local!individualMail,
          expression: if(
            validateemailaddress(fv!item),
            null,
            fv!index
          )
        )
      )
    ),
    ";",
    ","
  ),
  local!validation: if(
    isnull(local!invalidEmails),
    {},
    "Invalid email at " & local!invalidEmails & " position(s) "
  ),
  a!paragraphField(
    label: "Email Addresses",
    labelPosition: "JUSTIFIED",
    placeholder: "Email Addresses should be one per line (can be pasted from Excel)",
    value: ri!emailAddresses,
    saveInto: ri!emailAddresses,
    refreshAfter: "UNFOCUS",
    height: "TALL",
    required: true,
    validations: local!validation
  )
)

Konduru Chaitanya : I have used your above code but getting invalid email even though it is in email format .

Not sure why. I am not getting any errors for the same email address. Could you please share your rule/local variable section with the data. and what is the type for the rule input.

Konduru Chaitanya : emailaddresses is a text type in CDT 

if i add space after emailaddress then i'm not getting any error ,what is need of adding space

Harshit Bumb (Appyzie) said:

a!forLoop()

:raises eyebrow:

Even if calling split() and passing in a *literal linebreak* as the delimiter works (i'd say by accident here), i would strongly advise against this approach as it's not going to be very reliable and, as you can guess from the exchange here, might not be copied over correctly by others.

Instead just do: "split(local!emails, char(10))".

Even if calling split() and passing in a *literal linebreak* as the delimiter works (i'd say by accident here), i would strongly advise against this approach as it's not going to be very reliable and, as you can guess from the exchange here, might not be copied over correctly by others.

Instead just do: "split(local!emails, char(10))".

Mike Schmitt 
I agree. Didn't think of it and yeah the literal line break was me being clumsy  I had copied from the previous code I mentioned above. I didn't format.

Konduru Chaitanya :can you please explain why we are using substitute and tostring that part in code