Implement user search functionality with HTMX support for manual user selection in bulk updates

generic/templates/generic/partials/user_search_results.html

@@ -0,0 +1,12 @@
+{% if results %}
+  <ul style="list-style:none;padding:0;margin:0">
+    {% for item in results %}
+      <li style="margin:6px 0;">
+        <strong>{{ item.text|escape }}</strong>
+        <button type="button" onclick="setManualUser({{ row }}, {{ item.id }}, '{{ item.text|escapejs }}')" style="margin-left:8px;">Select</button>
+      </li>
+    {% endfor %}
+  </ul>
+{% else %}
+  <div><em>No users found</em></div>
+{% endif %}

generic/templates/generic/trainees_bulk_update.html

@@ -40,8 +40,11 @@
                             <div>
                                 <span style="color:red">No match</span>
                                 <div>
-                                            <input type="text" id="user-search-input-{{ r.row_index }}" placeholder="Search users..." style="width:220px" />
-                                            <button type="button" onclick="searchUsers({{ r.row_index }})">Search</button>
+                                    <form hx-get="{% url 'generic:user_search' %}" hx-target="#user-results-{{ r.row_index }}" hx-swap="innerHTML" onsubmit="return false;">
+                                        <input type="text" name="q" id="user-search-input-{{ r.row_index }}" placeholder="Search users..." style="width:220px" />
+                                        <input type="hidden" name="row" value="{{ r.row_index }}" />
+                                        <button type="submit">Search</button>
+                                    </form>
                                 </div>
                                 <div id="user-results-{{ r.row_index }}"></div>
                                 <input type="hidden" name="manual_user_{{ r.row_index }}" id="manual_user_{{ r.row_index }}" />
@@ -65,48 +68,21 @@
 
 {% block extra_scripts %}
 <script>
-        function searchUsers(rowIndex) {
-            const input = document.getElementById('user-search-input-' + rowIndex);
-            const q = input ? input.value.trim() : '';
-            const resultsDiv = document.getElementById('user-results-' + rowIndex);
+// Called from the HTMX-rendered results fragment to set the manual selection
+function setManualUser(rowIndex, id, text) {
     const hiddenInput = document.getElementById('manual_user_' + rowIndex);
-            resultsDiv.innerHTML = 'Searching...';
-            fetch("{% url 'generic:user_search' %}?q=" + encodeURIComponent(q))
-                .then(r => r.json())
-                .then(data => {
-                    resultsDiv.innerHTML = '';
-                    if (!data || !data.results || data.results.length === 0) {
-                        resultsDiv.innerHTML = '<div><em>No users found</em></div>';
-                        return;
+    const resultsDiv = document.getElementById('user-results-' + rowIndex);
+    if (hiddenInput) {
+        hiddenInput.value = id;
+    }
+    if (resultsDiv) {
+        resultsDiv.innerHTML = '<div>Selected: ' + escapeHtml(text) + '</div>';
     }
-                    const ul = document.createElement('ul');
-                    ul.style.listStyle = 'none';
-                    ul.style.padding = '0';
-                    data.results.forEach(function(item){
-                        const li = document.createElement('li');
-                        li.style.margin = '4px 0';
-                        const btn = document.createElement('button');
-                        btn.type = 'button';
-                        btn.textContent = 'Select';
-                        btn.style.marginLeft = '8px';
-                        btn.onclick = function(){
-                            hiddenInput.value = item.id;
-                            resultsDiv.innerHTML = '<div>Selected: ' + escapeHtml(item.text) + '</div>';
-                        };
-                        li.innerHTML = '<strong>' + escapeHtml(item.text) + '</strong>';
-                        li.appendChild(btn);
-                        ul.appendChild(li);
-                    });
-                    resultsDiv.appendChild(ul);
-                })
-                .catch(function(err){
-                    resultsDiv.innerHTML = '<div style="color:red">Error searching users</div>';
-                    console.error(err);
-                });
 }
 
 function escapeHtml(unsafe) {
-            return unsafe
+    if (!unsafe) return '';
+    return String(unsafe)
          .replace(/&/g, "&amp;")
          .replace(/</g, "&lt;")
          .replace(/>/g, "&gt;")

generic/views.py

@@ -4412,6 +4412,14 @@ def user_search(request):
         for u in qs:
             results.append({"id": u.pk, "text": f"{u.first_name} {u.last_name} ({u.email})"})
 
+        # If this is an HTMX request (or a row param was provided) render an HTML fragment
+        # that can be swapped into the preview row's results container. Otherwise return JSON.
+        row = request.GET.get("row")
+        if request.headers.get("HX-Request") == "true" or row is not None:
+            # Render a small partial that lists results with Select buttons that call
+            # the setManualUser(row, id, text) function in the parent page.
+            return render(request, "generic/partials/user_search_results.html", {"results": results, "row": int(row) if row is not None else None})
+
         return JsonResponse({"results": results})