如何关联以相同形式保存的两个Django模型 [英] How to relate two django models that are saved by the same form

问题描述

在新项目的前面，我有一个可以修改2个Django模型的表单。实际上，用户必须输入他的电子邮件，姓名，个人目标和该目标的期限。 电子邮件和名称属于模型用户，而其他两个属于模型目标。

on the frontsite of my new project I have a form that modifies 2 Django models. In fact, the user has to enter his email, name, a personal goal and a deadline for that goal. "email" and "name" belong to the model "User" while the other two belong to the model "Goal".

我正在尝试为目标与目标建立联系（ForeignKey）属于用户，但我做不到。我知道如果已经存在一个用户，但在我的情况下该用户和目标（属于他）是同时创建的。

I am trying to give the Goal a relation(ForeignKey) to belong to the user but I am unable to do it. I know how to do it if there is a user already existing but in my situation the user and the goal(that belongs to him) are created at the same time.

我的视图如下所示：

from django.shortcuts import render
from .models import Goal, User
from .forms import GoalForm, UserForm


def front_site(request):
    if request.method == "POST":
        goal_form = GoalForm(request.POST)
        user_form = UserForm(request.POST)
        if all([goal_form.is_valid(), user_form.is_valid()]):
            user_form.save()
            goal_form.save()
            return render(request, 'goalapp/single_goal.html',  {'user_form': user_form, 'goal_form': goal_form})
        else:
            user_form = UserForm(request.POST)
            goal_form = GoalForm(request.POST)
            return render(request, 'goalapp/front_site.html',  {'user_form': user_form, 'goal_form': goal_form})
    else:
        goal_form = GoalForm()
        user_form = UserForm()
        return render(request, 'goalapp/front_site.html',  {'user_form': user_form, 'goal_form': goal_form})

我的模型如下：

from django.db import models
from django.utils import timezone

class User(models.Model):
    user = models.CharField(max_length=50)
    user_email = models.EmailField()

    def __str__(self):
        return self.user

class Goal(models.Model):
    user = models.ForeignKey('goalapp.User', related_name='goal',    on_delete=models.CASCADE, null=True)
    goal_body = models.CharField(max_length= 100)
    goal_deadline = models.DateTimeField(default=timezone.now)
    goal_status = models.IntegerField(default = 1)

    def __str__(self):
        return self.goal_body

如何获取此信息

推荐答案

您可以通过使用commit = False保存表单来获取目标实例。

You can get the goal instance by saving the form with commit=False.

user = user_form.save()
goal = goal_form.save(commit=False)
goal.user = user
goal.save()

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