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instructure / canvas-lms

The open LMS by Instructure, Inc.
https://github.com/instructure/canvas-lms/wiki
GNU Affero General Public License v3.0
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SpeedGrader conversion issue `.docx` files containing Excel graphs with fit equations #2283

Open nbeaver opened 7 months ago

nbeaver commented 7 months ago

Summary:

SpeedGrader conversion issue for Excel graphs in .docx files causing certain text annotations to be lost.

Steps to reproduce:

  1. Copy an Excel graph with a fit equation and R² value into a .docx file.
  2. Upload to Canvas.
  3. Open the document in SpeedGrader.
  4. Navigate to the graph.

Example .docx file to reproduce: example_lab_report_with_excel_linear_fit.docx

Expected behavior:

Fit equation and R² value are retained.

save-as-picture

Actual behavior:

Fit equation and R² value are missing.

canvas-docx-submission-screenshot

Additional notes:

This does not occur for PDF files, so one workaround is to restrict uploads to exclude .docx files.

canvas-pdf-submission-screenshot

Example file to reproduce this issue is attached below.

example_lab_report_with_excel_linear_fit.docx

This bug may require the grader to manually download and inspect each .docx submission. This bug has existed at least since spring 2021 but probably well before that.