Validation Rule to Pattern (RegExp)

Dear Community Builder Support,I am running Community Builder 2.4.6 + build 2020‑09‑16 (e1fa0e483) on Joomla 3.10.x.
For one of my registration fields (type Text; name/id ) I need to validate mobile numbers with the pattern: What I did

1. Field Manager → cb_ue_cbtel → Validation tab
2. Set Validation Rule to Pattern (RegExp)
3. Entered the pattern above (no quotes, no spaces)
4. Saved the field and cleared Joomla & browser cache

Result

• The input keeps showing the default error message
  “Format: + and 11‑15 digits …”
  even for correct values like
  Code:

  +79991234567
  or
  Code:

  79991234567
  .
• In the browser console I verified:

is not output in the final element, so jQuery‑Validate never receives the rule. The same happens if I switch the rule to Custom REGEXP Validation.Other CB fields that use built‑in rules (e‑mail, required, etc.) are rendered correctly on the same page.Tried already

• Disabled the WYSIWYG editor (“None”) to avoid hidden characters
• Re‑saved the expression several times, copy‑pasting plain text
• Cleared Joomla cache, browser cache, tried Incognito mode
• Confirmed that no JS errors are thrown except unrelated extensions

QuestionIs this a known issue in CB 2.4.6?
Could you confirm whether Pattern (RegExp) should still render a attribute in this version, or has the syntax/field name changed?Any advice on how to make a custom regular‑expression validation work (or a patched file) would be greatly appreciated.Thank you for your time.Best regards,

Community Builder 2.4.6 + build 2020‑09‑16

Your release is from 5 years ago. I've no idea to be honest. Likely some sort of bug that has long been fixed. You're welcome to go through our ticket tracker below and see if there's any reports of such issue, but some fixes are just not made public or it may have been a bug caused by something else and that something else was fixed.

forge.joomlapolis.com/projects/cb/issues

Is there a reason you can't update your site?

Thank you. I'll be looking for it. There is no way to update the site. The site is as old as dinosaur guano and there are many customizations that are already difficult to remember.

Chatgpt did not find a fix, I also checked the forum for "data‑rule‑pattern", "Custom REGEXP Validation". In 2021, it was mentioned that in 2.4.7 the "Pattern (RegExp)" field outputs the attribute normally, while "Custom REGEXP Validation" sometimes does not — the author was offered to switch to Pattern mode or upgrade to 2.5.

A temporary solution was suggested by :
js
Copy
// custom.js, uploaded on the registration page
jquery(function ($) {
$('#cb_ue_cbtel').rules('add', {
pattern: /^(?+7|7)\d{10}$/,
messages: { pattern: 'Phone in the format +79991234567' }
});
});

I'll be testing it.

Sounds like it was a bug fixed in CB 2.5.0. Sorry, I don't have any solution to provide beyond updating.

Updated joomla to 3.10 and CB to 2.10. This is the limit for this site. The error has not disappeared. Where the encoding may be going is either the CB component/plugin, or the override of the template, or the system plugin that hooks into onContentPrepare and triggers rawurlencode() for unknown reasons. Disabling plugins didn't help. There are no optimizers on the site. Admintools, if only. Are there plugins that allow you to specify RegExp + server logic, bypassing the standard options?