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Change Gantt plot to be based on backup index; add calendar heatmap#114

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phrdang merged 13 commits into
mainfrom
gantt-backend
Apr 16, 2026
Merged

Change Gantt plot to be based on backup index; add calendar heatmap#114
phrdang merged 13 commits into
mainfrom
gantt-backend

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@phrdang

@phrdang phrdang commented Apr 16, 2026

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  • Because using absolute timestamp results in a hard to read plot since the data is super sparse, I updated the Gantt plot to be based on backup index instead. We still allow users to view the timestamp and duration in the tooltip
  • Also added a calendar heatmap so users can see visually how much work a student did (the number of backups they had) by date
Screen.Recording.2026-04-16.at.9.34.14.AM.mov

phrdang added 12 commits April 14, 2026 12:23
@phrdang
rails generate ProblemTimeline controller
973edf7
@phrdang
Add problem_index column to assignment_problems table; add Problem 0 …
495b33b 
…to list of problems in seeds.rb
@phrdang
Add problem timeline to routes.rb
fcf3720
@phrdang
Specify foreign key for backup metadatum associations with analytics,…
71f09ab 
… grading, and unlock messages
@phrdang
Implement problem timeline controller
5920428
@phrdang
Add numBackups as separate JSON field; fix error when problem has no …
61517c0 
…backups
@phrdang
Fetch problem timeline in frontend; misc Gantt plot updates
37b7bd6
@phrdang
WIP add gantt plot by backup index instead of absolute time because d…
3e570f2 
…ata is too sparse
@phrdang
Fix the way sessions are computed so that backup gantt plot works
4384946
@phrdang
Add dummy backup calendar chart
19a7ff8
@phrdang
Add problem calendar route and empty controller files
47cc852
@phrdang
Implement problem calendar controller, fetch it in BackupCalendarChart
3a44680
@phrdang phrdang self-assigned this Apr 16, 2026
@phrdang phrdang added the signal-to-noise Pertains to improving the signal-to-noise ratio of information displayed on the snapshots web app label Apr 16, 2026
@phrdang phrdang merged commit 96bd029 into main Apr 16, 2026
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@phrdang phrdang deleted the gantt-backend branch April 16, 2026 16:36
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signal-to-noise Pertains to improving the signal-to-noise ratio of information displayed on the snapshots web app

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