You signed in with another tab or window. Reload to refresh your session.You signed out in another tab or window. Reload to refresh your session.You switched accounts on another tab or window. Reload to refresh your session.Dismiss alert
Description
When recording a multipolygon/multi-lines feature, the app correctly enforces a minimum of 3 points per part for multipolygon and a minimum of 2 points per part for multi-lines with a warning messages: "You need to add at least 3 points to every part." / "You need to add at least 2 points to every part."
However, this validation is not triggered consistently during the digitising workflow. When a user adds a new part via More options → Add part, adds only 1 point, and then immediately proceeds to add another new part, the warning message is not displayed. The user is able to continue digitising without any indication that the previous part is invalid. The error is only shown at the final step when the user attempts to save/record the feature — by which point multiple invalid parts may have been created.
Open a project with a multipolygon/multines layer and start recording a new feature.
Add the first part with at least 3 points for multipolygons or at least 2 points for multi-lines (valid part).
Tap More options → Add part.
Add only 1 point to the new part.
Tap More options → Add part again to start another new part — observe whether the warning message appears.
Continue digitising and attempt to save/record the feature.
Actual results
No warning message is displayed when switching from an invalid part (with fewer than 3 points) to a new part via Add part. The user can continue digitising without any feedback. The error is only shown when attempting to save the entire feature at the end.
Expected results
The validation warning "You need to add at least 3 points to every part" should be displayed immediately when the user attempts to add a new part while the current part has fewer than 3 points. This prevents the user from creating multiple invalid parts unknowingly and provides earlier, more actionable feedback during the digitising workflow.
Screenshots or logs
ScreenRecording_07-14-2026.15-34-20_1.mp4
Conclusion Created by Claude and supervised by a human test analyst.
Description
When recording a multipolygon/multi-lines feature, the app correctly enforces a minimum of 3 points per part for multipolygon and a minimum of 2 points per part for multi-lines with a warning messages:
"You need to add at least 3 points to every part." / "You need to add at least 2 points to every part."
However, this validation is not triggered consistently during the digitising workflow. When a user adds a new part via More options → Add part, adds only 1 point, and then immediately proceeds to add another new part, the warning message is not displayed. The user is able to continue digitising without any indication that the previous part is invalid. The error is only shown at the final step when the user attempts to save/record the feature — by which point multiple invalid parts may have been created.
Environment
[x] Staging
Application (+ app version, build, operating system)
Mergin Maps Mobile App
Steps to reproduce
Actual results
No warning message is displayed when switching from an invalid part (with fewer than 3 points) to a new part via Add part. The user can continue digitising without any feedback. The error is only shown when attempting to save the entire feature at the end.
Expected results
The validation warning "You need to add at least 3 points to every part" should be displayed immediately when the user attempts to add a new part while the current part has fewer than 3 points. This prevents the user from creating multiple invalid parts unknowingly and provides earlier, more actionable feedback during the digitising workflow.
Screenshots or logs
ScreenRecording_07-14-2026.15-34-20_1.mp4
Conclusion
Created by Claude and supervised by a human test analyst.