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python - 如何在 Django 中保存 ModelForm 时将用户模型作为 ForeignKey 值传递？

问题描述

模型文件：

from django.db import models
from django.conf import settings


class Book(models.Model):
    rel_user = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE, verbose_name="Posted By")
    title = models.CharField(max_length=256, verbose_name="Title")
    description = models.TextField(verbose_name="Description")
    price = models.IntegerField(verbose_name="Price")
    state = models.CharField(max_length=256, verbose_name="State")
    city = models.CharField(max_length=256, verbose_name="City")
    neighbourhood = models.CharField(max_length=256, verbose_name="Neighbourhood")
    phone = models.IntegerField(verbose_name="Phone Number")

    def __str__(self):
        return self.title + f" ({self.rel_user.username})"

表格文件：

from django.forms import ModelForm
from Books.models import Book


class BookForm(ModelForm):
    class Meta:
        model = Book
        fields = ['title', 'description', 'price', 'state', 'city', 'neighbourhood', 'phone']

视图文件：

from django.shortcuts import render, redirect
from Books.forms import BookForm
from django.contrib import messages


def sell(request):
    if request.method == "GET":
        form = BookForm()
    else:
        form = BookForm(request.POST, )
        if form.is_valid():
            form.save()
            messages.success("Successfully added!")
            return redirect('sell')
        else:
            messages.error("Please fill in all the fields.")
    return render(request, 'Books/sell.html', {"form": form})

每次用户提交表单时，我都希望用该用户模型填充 ForeignKey 的值。我该怎么做呢？所以假设用户“John”已经填写了表格。当他单击提交时，他输入的详细信息 + 他的用户模型应该进入该条目的数据库。

标签： pythondjangodjango-modelsdjango-formsdjango-views

解决方案

def sell(request):
    if request.method == "POST":
        form = BookForm(request.POST)
        if form.is_valid():
            instance = form.save(commit=False)
            instance.rel_user = request.user
            instance.save()
            messages.success("Successfully added!")
            return redirect('sell')
        else:
            messages.error("Please fill in all the fields.")
    else:
         form = BookForm()
    return render(request, 'Books/sell.html', {"form": form}

request.user 可以像上面一样分配给 rel_user

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