Hide empty values on the species page

[eastagiletracker]

This PR proposes hiding the empty "N/A" rows on the species page so that only conservation statuses that actually have a value are displayed (Fixes #111). We include this PR work along with a full history of your repo at https://eastagiletracker.com/projects/276. You can sign in with your GitHub ID to claim ownership of the project.

What was wrong

Every species page rendered a fixed set of conservation status rows, filling in N/A wherever the taxon had no value — the default_if_none:"N/A" filters on the global rank, US status, Canadian status, regional rank, regional status and wetland status cells in goorchids/site/templates/gobotany/species.html. The "Facts About" section did the same for taxa with no factoid. This is visible on the site right now — the Ghost Orchid page renders five of them:

$ curl -s https://goorchids.northamericanorchidcenter.org/species/dendrophylax/lindenii/ | grep -c '<td>N/A</td>'
5

A related detail: the region switcher was built from every RegionalConservationStatus row, so a region whose record carries no rank, status or wetland value still appeared in the drop-down and selected an all-N/A table.

The change

species_view now builds the conservation status tables it hands to the template (_conservation_status_tables), in the same spirit as the character-group structures it already assembles. A row is included only when it has a value, a table is included only when it has rows, and the region drop-down is built from the tables that survive, so a region with nothing to show is no longer offered. The template renders that structure instead of a fixed grid of cells. When a taxon has no conservation status at all, the section says so in one line rather than showing a table of N/A. Rows that do have values keep their existing labels, order and markup — including the data-region attributes and the hidden class that orchid_site/species.js toggles — so the region switcher behaves exactly as before. The "Facts About" section is now omitted when the factoid is empty instead of printing N/A.

Verifying it

Reproduced on master at f882c27 with the new tests in place and the fix reverted:

$ docker compose exec -e PYTHONDONTWRITEBYTECODE=1 goorchids python manage.py test goorchids.site
FAIL: test_ranks_without_a_value_are_left_out
AssertionError: 'US Status' unexpectedly found in ... <th>US Status</th>\n<td>N/A</td>
FAILED (failures=6)

Six of the seven new tests fail on the unmodified tree; the seventh is the control that asserts a populated "Facts About" section still renders, and stays green either way. With the change applied they all pass, and the project suite goes from 3 tests to 10 with no new failures:

$ docker compose exec -e PYTHONDONTWRITEBYTECODE=1 goorchids python manage.py test
Ran 10 tests in 0.290s
OK

The tests live in goorchids/site/tests/, following the package layout adopted for goorchids/core/tests/ in #183. They drive the real species URL through the test client and cover: ranks with no value dropped, regional statuses with no value dropped, a species with no status at all, a region that has nothing to show being left out of the switcher, every populated status still rendering (with the <option value="fl">Florida</option> markup intact), and the "Facts About" section in both states.

How this was managed

This work was tracked as a story on a board imported from this repository's own issues and pull requests — 181 stories and 6 labels: Hide N/A values on the Species page, on the Go Orchids board.

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Lawrence W. Sinclair
CEO / East Agile
linkedin.com/in/lwsinclair/
eastagile.com