Implemented editing for model instances

players/forms.py

@@ -4,4 +4,4 @@ from .models import Player
 class PlayerForm(forms.ModelForm):
     class Meta:
         model = Player
-        fields = ['first_name', 'last_name', 'jersey_number']
+        fields = ['first_name', 'last_name', 'jersey_number', 'team']

players/urls.py

@@ -5,5 +5,6 @@ from . import views
 urlpatterns = [
     path('', views.root, name="root"),
     path('list', views.list, name="players list"),
-    path('edit/<int:id>', views.edit, name="edit player")
+    path('edit/<int:id>', views.edit, name="edit player"),
+    path('edit', views.edit, name="edit player")
 ]

players/views.py

@@ -13,17 +13,22 @@ def list(request):
                                          'items': [(player.id, f"{player.first_name} {player.last_name}") for player in players],
                                          'edit_url_name': 'edit player'})
 
-def edit(request, id=None):
+def edit(request, id=0):
     # if this is a POST request we need to process the form data
     if request.method == 'POST':
         # create a form instance and populate it with data from the request:
-        form = PlayerForm(request.POST)
+        if id:
+            instance = get_object_or_404(Player, id=id)
+            form = PlayerForm(request.POST or None, instance=instance)
+        else:
+            form = PlayerForm(request.POST or None)
         # check whether it's valid:
         if form.is_valid():
             # process the data in form.cleaned_data as required
             # ...
             # redirect to a new URL:
-            return HttpResponse(str(form.cleaned_data))
+            new_player, did_create = Player.objects.update_or_create(pk=id, defaults=form.cleaned_data)
+            return render(request, 'success.html', {'call_back':'players list'})
 
     # if a GET (or any other method) we'll create a blank form
     else:
@@ -33,4 +38,4 @@ def edit(request, id=None):
         else:
             form = PlayerForm
 
-    return render(request, 'players/edit.html', {'form': form, 'id': id})
+    return render(request, 'edit.html', {'form': form, 'id': id, 'call_back':'edit player'})