MerginMaps / MerginMaps/qgis-plugin

QGIS plugin: Create diff fails

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Dominant language
Python
Stars
44
Forks
20
Avg merge
3d 12h
Merged PRs (30d)
5

Description

Description
Once the diff is created from Toolboxes, it fails and no diff is available.

Environment
Staging

Application (+ app version, build, operating system)
QGIS version: 3.40.5-Bratislava
Plugin version: 2025.2
OS: macOS, Sequoia 15.5

Steps to reproduce

  1. open project with polygon layer
  2. update some features in polygon layer (add, remove, update...)
  3. Save and synchronize project.
  4. In QGIS go to Processing -> Toolbox -> Mergin Maps -> Tools -> Create diff
  5. in "Project directory" find path to the project, select "Input layer" to Polygon and hit run

Actual results
Error from Create diff tool:

Image

Expected results
new Diff layer should appears between layers, where changes should be visualized on map and also in attribute table of the new layer

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

The issue names no source file or test. Reproduce the failure in QGIS 3.40.5 with the listed polygon-layer steps, then trace the Create diff processing tool entry point and its error output. Done means the tool completes and adds a diff layer showing changes on the map and in its attribute table.

Written by the indexing model from the issue text.

Assessment

Tech stack
python
Domain
desktop, tooling
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
42/100

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