Refactor synonym management: extract synonyms list and add forms for adding synonyms with HTMX support

atlas/views.py

@@ -860,6 +860,9 @@ def condition_detail(request, pk):
         if form.is_valid():
             other = form.cleaned_data.get("condition")
 
+        # keep the form (possibly with errors) to render back in HTMX responses
+        synonym_form = form
+
         # If no autocomplete selection, accept a free-text name
         synonym_name = request.POST.get("synonym_name")
         if not other and synonym_name:
@@ -874,6 +877,17 @@ def condition_detail(request, pk):
             condition.synonym.add(other)
             other.synonym.add(condition)
 
+        # If this was an HTMX request return the updated synonyms partial so the
+        # page can be updated without a full redirect. Otherwise perform the
+        # existing redirect back to the detail page.
+        if request.htmx:
+            html = render_to_string(
+                "atlas/partials/_synonyms_list.html",
+                {"condition": condition, "synonym_form": synonym_form, "can_merge": can_merge},
+                request=request,
+            )
+            return HttpResponse(html)
+
         return redirect("atlas:condition_detail", pk=condition.pk)
 
     # logging.debug(atlas.subspecialty.first().name.all())