Hi All,
I created a custom web form to capture an accountant’s signature, but the signature isn’t rendering automatically after signing; it only appears after the page is refreshed.
I added t-if="picking.accountant_signature" so that the signature should appear once it’s completed. However, it only shows up after refreshing the page.
How can I fix this?
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Hi,
The issue occurs because Odoo QWeb templates using t-if are evaluated only at initial render. When the picking.accountant_signature field is updated via a custom web form, the template doesn’t automatically refresh, so the signature only appears after a full page reload. QWeb is not reactive by default, which is why changes in backend fields aren’t immediately reflected in the DOM.
<img t-if="picking.accountant_signature" t-att-src="'data:image/png;base64,%s' % picking.accountant_signature"/>
To resolve this, you can use JavaScript to dynamically update the DOM after the signature is saved, or trigger a partial re-render of the template containing the signature. Alternatively, in Odoo 16/17, you can use OWL reactive components, which automatically update the view when the underlying state changes. Another approach is to ensure the <img> tag’s src attribute is dynamically bound and then refresh the component via JS after saving the signature.
Hope it helps
Hello vikas,
I think the issue in the img tag, because there is a no JavaScript that updates the DOM after the signature is submitted. you need to write something like this "selector: '#accept_accountant', for modal and event related to that.
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