Redwood: VB Studio canvas won't load after the 26A patch

 

The symptom

After extending a Redwood page in VB Studio, the Submit button appeared exactly where it should. It looked right, it was enabled, and clicking it did nothing. There was no error message, no spinner and no transaction created. Users assumed the system was slow and clicked again and again.

Why it happens

In Redwood pages built on Oracle JET, a button is only a visual component until something is wired to its click event. The button was placed on the page, but it had no ojAction event binding, so no action chain was connected to it. JET fires the event, and nothing is listening.

This is easy to miss when you copy a button from another page or rebuild a layout. The markup comes across, but the event mapping doesn't.

How I fixed it

1. Open the page in VB Studio and select the button in the Page Designer.
2. Go to the button's Events tab. If ojAction isn't listed, that's the problem.
3. Add a new event for ojAction and attach it to the action chain that submits the transaction. Create one if needed, or reuse the existing submit chain from the original page.
4. In the page source, confirm the button now has on-oj-action="[[$listeners.yourSubmitListener]]".
5. Preview, test the full submit, then publish the extension.

How to avoid it next time

• After copying any button, check its Events tab before you test anything else.
• Add "every action button has an ojAction listener" to your Redwood extension checklist.
• If a button "does nothing" with no error, check the event binding before suspecting security or the REST service.

Key takeaway

In Redwood, a button you can see is not a button that works. A silent failure with no error almost always means the event isn't wired, not that the back end failed.

Next in the series: a VB Studio canvas that won't load after the 26A patch, and why deleting the workspace was the fix.