[collector] can now collect Teile and list them

If a newly entered Teil already exists, we ignore that and do nothing.

"name" could become a primary key...

collector/templates/collector/detail.html

@@ -1,2 +1,17 @@
 <h1>{{ teil.name }}</h1>
 Last Changed: {{ teil.modified }}
+
+<hr>
+
+<form action="{% url 'collector:detail' teil.id %}" method="POST">
+  {% csrf_token %}
+  <fieldset>
+    <legend>
+      <h1>{{ teil.name }}</h1>
+    </legend>
+    {% if error_message %}
+      <p><strong>{{ error_message }}</strong></p>
+    {% endif %}
+  </fieldset>
+<input type="submit" name="submit" value="enter it!">
+</form>

collector/templates/collector/index.html

@@ -15,3 +15,9 @@
   <p>Keine Teile da.</p>
 
 {% endif %}
+
+<form method="POST" action="{% url 'collector:enter' %}">
+  {% csrf_token %}
+  <input type="text" name="new_name" value="">
+  <input type="submit" name="submit" value="add new Teil">
+</form>

collector/urls.py

@@ -7,4 +7,6 @@ app_name = "collector"
 urlpatterns = [
     path("", views.index, name="index"),
     path("recorded/<int:teil_id>/", views.detail, name="detail"),
+    path("enter/", views.enter, name="enter"),
+    path("all/", views.list_all, name="all"),
 ]

collector/views.py

@@ -1,5 +1,6 @@
-from django.http import HttpRequest, HttpResponse
+from django.http import HttpRequest, HttpResponse, HttpResponseRedirect
 from django.shortcuts import get_object_or_404, render
+from django.urls import reverse
 
 from .models import Teil
 
@@ -12,6 +13,20 @@ def index(request: HttpRequest) -> HttpResponse:
     return render(request, "collector/index.html", context)
 
 
+def list_all(request: HttpRequest) -> HttpResponse:
+    teile_list = Teil.objects.order_by("-modified")
+    return render(request, "collector/index.html", {"teile_list": teile_list})
+
+
 def detail(request: HttpRequest, teil_id) -> HttpResponse:
     teil = get_object_or_404(Teil, pk=teil_id)
     return render(request, "collector/detail.html", {"teil": teil})
+
+
+def enter(request: HttpRequest) -> HttpResponse:
+    try:
+        Teil.objects.create(name=request.POST["new_name"])
+    except Exception:
+        pass
+
+    return HttpResponseRedirect(reverse("collector:index"))