The Calendar grid (day-cells with project bars) is great for seeing
which projects had activity on a given day, but bad for seeing how
long any single deployment lasted. The Gantt view inverts that —
one row per project, horizontal bars per assignment window — so an
operator can read durations at a glance.
Service layer
- backend/services/deployment_history.py extends each project's
payload with `bars`: a list of {unit_id, location_id, location_name,
start, end, is_active, source} for every UnitAssignment clipped to
the visible 12-month window. Location names are batch-resolved.
Same cost as before since the underlying assignment scan is the
same; just additional data in the response.
Template
- Tab switcher at the top of /tools/deployment-history toggles
between Calendar and Gantt views. URL hash (#gantt) preserves the
active view across month-nav (Prev / Next / Recent buttons within
the Gantt view link to ?...#gantt to stay on the same tab).
- Gantt view is a plain SVG with:
- Left 220px label gutter: project color dot + truncated name,
whole row clickable → opens the project page
- Right area: horizontal time axis with month gridlines + labels,
"today" dashed orange line, one row per project
- One bar per assignment in that row, colored by project, reduced
opacity for closed assignments, blue outline for metadata-
backfilled assignments, white tip on the right edge of active
bars
- Hover any bar → tooltip with unit + location + window
- Alternating row backgrounds for readability.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
The per-unit Gantt chart on /unit/{id} (Phase 1, v0.11.0) was scoped
to one unit's deployment timeline. This adds the fleet-wide view as
a new entry under /tools.
What it shows
- 12-month calendar grid styled like the Job Planner (4 months per
row, responsive down to single column on mobile).
- Each day cell shows up to 4 colored mini-bars — one per project
that had ≥1 active UnitAssignment that day, color deterministically
hashed from project_id. Days with >4 active projects show "+N".
- KPI strip at the top: project count, distinct unit count, total
assignment count in the window.
- Collapsible project legend: ordered by first-active date (which
matches the deployment-history reading order), each row links to
the project page, shows the assignment count.
Click-a-day side panel
- Click any populated day cell → slide-over panel from the right
- Groups by project, lists every (unit, location) active that day
- Per-deployment: unit link, location link, window dates, active /
closed badge, "auto-backfilled" tag for metadata_backfill source
- Sources from a new GET /api/admin/deployment-history/day endpoint
Navigation
- Prev / Next month buttons shift the 12-month window by one month
- "Recent" button jumps back to default (12 months ending now)
- Default window is 11 months back from current month — operator
sees the recent past on first load, not future emptiness
Files
- backend/services/deployment_history.py — data builder + day-detail
helper. Walks UnitAssignment windows, intersects with the 12-month
range, computes per-project active-day sets.
- backend/routers/deployment_history.py — page route + day-detail JSON
endpoint. Wired into main.py.
- templates/admin/deployment_history.html — page + side-panel
- templates/tools.html — new card linking to the page
Phase 3 (deferred): drag-to-resize bars to retroactively adjust
assignment windows from inside the calendar; per-unit row view
(complement to the project-row view) for "where has unit X been across
all jobs"; horizontal scroll for >12-month windows.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
serversdown