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DEV: Add a callback to the validation of user custom fields in the signup form (#27369 )

# Description

Add `addCustomUserFieldValidationCallback` to the user fields validation mixin. This allows you to add a custom validation when checking the validity of custom user field values in the signup form on submit. 

```js
addCustomUserFieldValidationCallback((userField) => {
  if (userField.field.name === "my custom user field" && userField.value === "foo") {
    return EmberObject.create({
      failed: true,
      reason: I18n.t("value_can_not_be_foo"),
      element: userField.field.element,
    });
  }
});
```

In the case your custom validation deems an input value `failed`, you return an EmberObject with the fields `failed: true`, `reason`, and `element`.

```js
return EmberObject.create({
  failed: true,
  reason: I18n.t("value_can_not_be_foo"),
  element: userField.field.element,
});
```

which will then display your custom `reason` to the user attached to the given user custom field input and will not submit the signup form.

<img width="288" alt="Screenshot 2024-06-06 at 11 08 40 AM" src="https://github.com/discourse/discourse/assets/50783505/11168fb8-8806-43f0-9417-73991bbd1178">

# Other

- Add `addCustomUserFieldValidationCallback` to the plugin api
- Bump plugin api version
- Update plugin api changelog
- Add tests

2024-06-06 11:17:06 -06:00

ADMIN-QUICK-START-GUIDE.md

FIX: uses the correct link for the General category (#26891 )

2024-05-07 13:42:58 +02:00

AUTHORS.md

HTTPSify links (#7046 )

2019-02-22 16:29:27 +01:00

CHANGELOG-JAVASCRIPT-PLUGIN-API.md

DEV: Add a callback to the validation of user custom fields in the signup form (#27369 )

2024-06-06 11:17:06 -06:00

code-of-conduct.md

Update Code of Conduct to v2.0 (#12296 )