我正在尝试创建一个表单集,允许用户为每个 Priority
设置分数。使用 CreateView
创建新项目时. Priority
模型已经有数据关联(3 个值)foreach Priority
我正在尝试返回 Project
中的字符字段。 CreateView
用户可以在其中输入 score
为 Priority
.
目前,我在 Project
中显示了三个字符字段。 CreateView
但优先级没有被保存。我做了一些测试,它看起来像 ProjectPriority
从来没有 Project
或 Priority
values 只设置分数值。
我一直在努力让这个工作好几天。我感谢所有的帮助。
Views.py
class ProjectCreateview(LoginRequiredMixin, CreateView):
model = Project
form_class = ProjectCreationForm
success_url = 'home/project/project_details.html'
def get_context_data(self, **kwargs):
ChildFormset = inlineformset_factory(
Project, ProjectPriority, fields=('priority', 'score'), can_delete=False, extra=Priority.objects.count(),
)
data = super().get_context_data(**kwargs)
if self.request.POST:
data['priorities'] = ChildFormset(self.request.POST, instance=self.object)
else:
data['priorities'] = ChildFormset(instance=self.object)
return data
def form_valid(self, form):
context = self.get_context_data()
priorities = context["priorities"]
self.object = form.save()
if priorities.is_valid():
priorities.instance = self.object
priorities.save()
return super().form_valid(form)
模型.py class Priority(models.Model):
title = models.CharField(verbose_name="Title", max_length=250)
def __str__(self):
return self.title
class Project(models.Model):
name = models.CharField(verbose_name="Project Title", max_length=100)
details = models.TextField(verbose_name="Project Details/Description", blank=False)
priority = models.ManyToManyField(
Priority,
through='ProjectPriority',
related_name='priority'
)
creator = models.ForeignKey(User, on_delete=models.CASCADE)
class ProjectPriority(models.Model):
project = models.ForeignKey(Project, on_delete=models.CASCADE)
priority = models.ForeignKey(Priority, on_delete=models.CASCADE)
score = models.CharField(max_length=1000, choices=priority_choices)
class Meta:
verbose_name = "Priority"
verbose_name_plural = "Priorities"
def __str__(self):
return f"Priority: {self.priority.title}, Score: {self.score}, Project: {self.project.name}"
模板{% block content %}
<div class="container-fluid" style="margin-top: 25px;">
<div class="row">
<div class="col-xl-8">
<form method="POST">
{% csrf_token %}
<fieldset class="form-group">
<legend class="border-bottom mb-4">New Project</legend>
{{ form|crispy }}
</fieldset>
<h2>Priority Criteria</h2>
{{ priorities|crispy }}
<div class="form-group">
<button class="btn btn-outline-info" type="submit">Create
Project</button>
</div>
</form>
</div>
</div>
{% endblock content %}
最佳答案
在您的 form_valid
方法你有这样的代码:
def form_valid(self, form):
context = self.get_context_data()
priorities = context["priorities"]
self.object = form.save()
if priorities.is_valid():
priorities.instance = self.object
priorities.save()
return super().form_valid(form)
但是此时尝试设置实例(在调用 is_valid
之后)将不起作用,因为当您调用 priorities.is_valid()
时,表单已经构建好了。循环缓存的属性 forms
导致使用 instance
构造表单的表单集然后被设置为一个空的(因为你还没有提供它)。解决方案只是在调用 is_valid
之前设置实例。 .另请注意 super().form_valid(form)
也将保存对象,您应该自己在那里返回响应:from django.http import HttpResponseRedirect
class ProjectCreateview(LoginRequiredMixin, CreateView):
# Other attributes and get_context_data here
def form_valid(self, form):
context = self.get_context_data()
priorities = context["priorities"]
self.object = form.save()
priorities.instance = self.object # Set the instance here
if priorities.is_valid():
priorities.save()
return HttpResponseRedirect(self.get_success_url())
关于django - 在创建 View 中迭代模型并返回内联表单集,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/67001262/