# I can't open my webapp

**URL:** https://discuss.tryton.org/t/i-cant-open-my-webapp/7811
**Category:** Developer
**Created:** [September 8, 2024, 5:30am UTC](https://discuss.tryton.org/t/i-cant-open-my-webapp/7811 "2024-09-08T05:30:25Z")
**Posts on this page:** 3
**Page:** 1

<div class="post-metadata">

### Author: ![Siobhan](https://discuss-cdn.tryton.org/letter_avatar_proxy/v4/letter/s/a88e4f/32.png) [@Siobhan](https://discuss.tryton.org/u/Siobhan)
#### Post date: [September 8, 2024, 5:30am UTC](https://discuss.tryton.org/t/i-cant-open-my-webapp/7811/1 "2024-09-08T05:30:25Z")

</div>

```auto
<form>
    <button name="recognize_face" string="Get your Attendance" type="object"/>
    <newline />
    <button name="action_initialize_face" string="Initialize Your Face" type="object"/>
</form>

```

I can’t seem to get this two do their action, is this something wrong?

```auto

    def action_initialize_face(self):
        # Check user permission (optional)
        user_id = self.context.get('user')
        if not user_id:
            raise UserError('User context is not available.')

        # Open the web application for face recognition initialization
        for record in self:
            url = (f"http://localhost:8080/initialize-face?"
                   f"employee_id={record.id}")
            webbrowser.open(url)
    

    def action_open_webapp(self):
        # Check user permission (optional)
        user_id = self.context.get('user')
        if not user_id:
            raise UserError('User context is not available.')

        # Open the web application with parameters
        for record in self:
            url = (f"http://localhost:8080/face-recognition?"
                   f"employee_id={record.id}&"
                   f"face_id={record.face_recognition_id}")
            webbrowser.open(url)

```

This what happens in tryton:

 ![Screenshot from 2024-09-05 00-39-02](https://discuss-cdn.tryton.org/uploads/default/original/2X/9/94a480e59e8eed5afae35e3feddf005e5487d83c.png)

---

<div class="post-metadata">

### Author: ![ced](https://discuss-cdn.tryton.org/user_avatar/discuss.tryton.org/ced/32/1237_2.png) [@ced](https://discuss.tryton.org/u/ced)
#### Post date: [September 8, 2024, 9:21am UTC](https://discuss.tryton.org/t/i-cant-open-my-webapp/7811/2 "2024-09-08T09:21:25Z")

</div>

The buttons must be declared on the [`ModelView._buttons`](https://docs.tryton.org/latest/server/ref/models.html#trytond.model.ModelView._buttons) to allow the client to call them via RPC.

Also you should not call `webbrower.open` on the module side because it is run on the server side. So it is the browser of the server that will be launched.

I suspect that you want the user to open a the URL from the form in the client. Then you must use a [`Function` field](https://docs.tryton.org/latest/server/ref/fields.html#function) that compute the value of a [`Char` field](https://docs.tryton.org/latest/server/ref/fields.html#char) which is the URL. And in the `form` view instead of buttons, you display the `Function` field with the widget `url`.

---

<div class="post-metadata">

### Author: ![Siobhan](https://discuss-cdn.tryton.org/letter_avatar_proxy/v4/letter/s/a88e4f/32.png) [@Siobhan](https://discuss.tryton.org/u/Siobhan)
#### Post date: [September 8, 2024, 1:23pm UTC](https://discuss.tryton.org/t/i-cant-open-my-webapp/7811/3 "2024-09-08T13:23:05Z")

</div>

Could you give me an example of how to use that ModelView? I am rather clueless.