Django

Question

我在使用 Django 中的 .save() 方法时遇到一点问题。对于一种形式，它有效，对于另一种形式，它不起作用。而且我找不到问题。

views.py

@login_required
def stock_add(request, portfolio_id):
    if request.method == 'POST':
        print('request.method is ok')
        form = StockForm(request.POST)
        print('form is ok')

        if form.is_valid():
            print('form is valid')
            stock = form.save(commit=False)
            stock.created_by = request.user
            stock.portfolio_id = portfolio_id
            stock.save()
            return redirect('portfolio-overview')
        else:
            print("nope")
    else:
        print('else form statement')
        form = StockForm()

    context = {
        'form':form
    }
    return render(request, 'portfolios/stock-add.html', context)

forms.py

class StockForm(ModelForm):
    class Meta:
        model = Stock
        fields = ['quote', 'amount']

html

{% extends 'core/base.html' %}

{% block content %}
<div class="container">
    <h1 class="title">Add Stock</h1>

    <form method="POST" action=".">
        {% csrf_token %}

        {{ form.as_p }}
        <button type="submit" class="button is-primary">Submit</button>
    </form>
</div>
{% endblock %}

型号

from django.db import models
from django.contrib.auth.models import User
# Create your models here.

class Portfolio(models.Model):
    title = models.CharField(max_length=56)
    description = models.TextField(blank=True, null=True, max_length=112)

    created_by = models.ForeignKey(User, related_name='portfolios', on_delete=models.CASCADE)
    created_at = models.DateTimeField(auto_now_add=True)

    class Meta:
        verbose_name_plural = 'Portfolio'

    def __str__(self):
        return self.title



class Stock(models.Model):
    Portfolio = models.ForeignKey(Portfolio, related_name='stocks', on_delete=models.CASCADE)
    quote = models.CharField(max_length=10)
    amount = models.IntegerField()

    created_by = models.ForeignKey(User, related_name='stocks', on_delete=models.CASCADE)
    created_at = models.DateField(auto_now_add=True)

    def __str__(self):
        return self.quote

如果你查看 views.py 文件，当我提交表单时，它甚至不会打印 ('request.method is ok') 我可以通过管理页面添加股票。

所以我不知道该去哪里找了...

干杯

Answer 1

当您 post 一个表单并且需要一个特殊的 url （就像您的带有属性的）时，我喜欢设置 action="{% url myview.views.stock_add portfolio_id %}"

action="." 将保存到同一页面而不考虑额外参数（如果需要）

只需在 context 中传递 portfolio_id 就可以了

Answer 2

我找到了答案，InteregerField（来自 models.py）需要一个默认值。默认值=None（或其他值）。

干杯

Django - 通过表单保存模型不起作用

Django - saving model via a form is not working

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