在Django中创建，更新和删除 [英] Create, Update and Delete in Django

问题描述

我目前只在我的 models.py 中为某些字段创建条目。现在，我想将删除和更新函数到我的应用程序。让我们以模型为例：

I am only creating entries for some fields in my models.py at the moment. Now I want to add Delete and Update functions to my Application. Let's take this Model for example:

class todoList(models.Model):
  trainee = models.ForeignKey(trainee, verbose_name = "Azubi", blank = True)
  todoLearningObjective = models.ManyToManyField(learningObjective, verbose_name = "Lernziel", blank = True, null = True)
  tasks = models.TextField(verbose_name = 'Aufgaben')
  levyDate = models.DateField(verbose_name = 'Abgabedatum', blank = True, null = True)
  priority = models.IntegerField(verbose_name = 'Prioritaet', blank = True, null = True)

  class Meta:
    verbose_name = "To-Do Liste"
    verbose_name_plural = "To-Do Listen"

匹配的表单：

class todoListForm(forms.Form):
  formtrainee = forms.IntegerField(required = False)
  formtodoLearningObjective = forms.CharField(required = False)
  formtasks = forms.CharField(required = True)
  formlevyDate = forms.DateField(required = False)
  formpriority = forms.IntegerField(required = False)

和查看：

def todo(request):
  trainee_objects = trainee.objects.all()
  usernameID = 1
  for traineeUser in trainee_objects:
    if traineeUser.username == request.user.username:
      usernameID = traineeUser.id

  if request.method == 'POST':
    forms = todoListForm(request.POST)
    if forms.is_valid():
      formtasks = forms.cleaned_data['formtasks']
      formtodoLearningObjective = forms.cleaned_data['formtodoLearningObjective']
      formlevyDate = forms.cleaned_data['formlevyDate']
      formpriority = forms.cleaned_data['formpriority']

      neueTodo=todoList(tasks=formtasks, levyDate=formlevyDate, priority=formpriority, trainee_id = usernameID)
      neueTodo.save()
      for todo in learningObjective.objects.filter(learningObjectives=formtodoLearningObjective):
        neueTodo.todoLearningObjective.add(todo)
    else:
      forms = todoList()
    return render(request, 'todo.html', {'todo': todoList.objects.all(), 'Lernziel': learningObjective.objects.all()})

如你所见，我有 M到M 关系，我只是创建新条目。我现在的问题是：我必须为每个模型创建一个新的更新和删除方法？还是有更简单的方法？我想保持我的项目干，虽然我可能已经失败了这个任务。如果您能给我举例说明Django中的删除和更新的工作原理，那将是非常棒的。

As you can see, I have M to M relations and I am just creating new entries. My question is now: Do I have to create a new update and delete method for every model ? Or is there an easier way ? I want to keep my project DRY although I probably failed that mission already. It would be awesome if you could give me example or documentation on how Deleting and Updating in Django works all in all.

推荐答案

你已经为此建立了基于类的视图。

You have built class based views for that.

from django.views.generic import CreateView,UpdateView,DeleteView

class Todo(CreateView):
    formClass = todoListForm
    template_name = 'your_template_name.html'

更多信息

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