BES-6 Delete note

bestnotes/models.py

@@ -39,17 +39,17 @@ def save_studentprofile(sender, instance, **kwargs):
 
 
 class Subject(models.Model):
-    name = models.CharField(max_length=30)
+    name = models.CharField(max_length=40)
     student = models.ForeignKey(StudentProfile, on_delete=models.CASCADE)
 
 class Topic(models.Model):
-    name = models.CharField(max_length=30)
+    name = models.CharField(max_length=40)
     subject = models.ForeignKey(Subject, on_delete=models.CASCADE)
     add_date = models.DateField()
 
 
 class Note(models.Model):
-    name = models.CharField(max_length=30)
+    name = models.CharField(max_length=60)
     content = tinymce_models.HTMLField("Content")
     text = models.TextField(blank=False)
     topic = models.ForeignKey(Topic, on_delete=models.SET_NULL, null=True)

bestnotes/templates/note.html

@@ -11,7 +11,10 @@
 </div>
 {% if note.user.user.id == user.id %}
 <div class="container">
-    <div class="row d-flex justify-content-center"><button id="edit_note" class="btn-success mr-1">Edytuj</button> <button id="delete_note" class="btn-danger">Usuń</button></div>
+    <div class="row d-flex justify-content-center"><button id="edit_note" class="btn-success mr-1">Edytuj</button> 
+    <form action="{% url 'delete_note' note_id=note.id%}">
+        <button type="submit" id="delete_note" class="btn-danger">Usuń</button></div>
+    </form>
 </div>
 {% endif %}
 

bestnotes/urls.py

@@ -14,5 +14,6 @@ urlpatterns = [
     path('addnote/', views.add, name="add"),
     path('notes/', views.notes_all, name="notes"),
     path('notes/<subject_id>', views.notes_name, name="notes_id"),
-    path('create/', views.create_note, name="create_note")
+    path('create/', views.create_note, name="create_note"),
+    path('delete_note/<note_id>', views.delete_note, name="delete_note")
 ]

bestnotes/views.py

@@ -124,3 +124,27 @@ def create_note(request):
         note.save()
     url = reverse('subject')
     return HttpResponseRedirect(url)
+
+def delete_note(request, note_id):
+    #Get values
+    note = Note.objects.get(pk=note_id)
+    student = StudentProfile.objects.get(user=request.user.id)
+    #Check if student has possibility do delete this note
+    if note.user.id == student.id:
+        note.delete()
+    delete_empty_categories()
+    #Redirect
+    url = reverse('subject')
+    return HttpResponseRedirect(url)
+
+def delete_empty_categories():
+    #Get all topics
+    topics = Topic.objects.all()
+    for topic in topics:
+        if not topic.note_set.all().exists():
+            topic.delete()
+    #Same for subjects
+    subjects = Subject.objects.all()
+    for subject in subjects:
+        if not subject.topic_set.all().exists():
+            subject.delete()