python - Django——“输入一个有效的日期。” 更新模型时出错

Question

但是当我使用“runserver”命令重新启动服务器时，它只工作一次，但是当我再次尝试编辑模型时，它再次显示错误。DateTime 字段没有显示错误，我的项目中的所有模型都发生了同样的事情

Django 版本： Django-3.2.3 Python 版本： 3.8

我的错误 图片

我的模特

from django.db import models
from django.urls import reverse
from django.contrib.auth.models import User
from django.utils.timezone import now
from products.models import Products
from organizations.models import Persons, Companies

ORDER_STATUS_CHOICES = [
    ('Processing', 'Processing'),
    ('Confirmed', 'Confirmed'),
    ('Delivered', 'Delivered'),
]


def increment_order_number():
    last_order = Orders.objects.all().order_by('id').last()
    if not last_order:
        return 'FEO-0001'
    order_number = last_order.order_no
    order_int = int(order_number.split('FEO-')[-1])
    new_order_int = order_int + 1
    new_order_no = ''
    if new_order_int < 10:
        new_order_no = 'FEO-000' + str(new_order_int)
    if 100 > new_order_int >= 10:
        new_order_no = 'FEO-00' + str(new_order_int)
    if 100 <= new_order_int < 1000:
        new_order_no = 'FEO-0' + str(new_order_int)
    if new_order_int >= 1000:
        new_order_no = 'FEO-' + str(new_order_int)
    return new_order_no


# model for order
class Orders(models.Model):
    order_no = models.CharField(max_length=10, unique=True, default=increment_order_number)
    person_name = models.ForeignKey(Persons, on_delete=models.CASCADE, null=True)
    company_name = models.ForeignKey(Companies, on_delete=models.CASCADE, null=True)
    product_name = models.ForeignKey(Products, on_delete=models.CASCADE, null=True)
    total_weight = models.FloatField(max_length=10)
    rate_per_kg = models.FloatField(max_length=10)
    percentage_of_fotka = models.FloatField(max_length=10)
    percentage_of_moisture = models.FloatField(max_length=10)
    delivery_deadline = models.DateField(default=now)
    date_ordered = models.DateTimeField(default=now)
    added_by = models.ForeignKey(User, on_delete=models.CASCADE)
    order_status = models.CharField(max_length=20, null=True, choices=ORDER_STATUS_CHOICES, default='Processing')
    remarks = models.CharField(max_length=500, blank=True)

    def __str__(self):
        return str(self.order_no)

    @staticmethod
    def get_absolute_url():
        return reverse('order-list')

我的观点

from django.shortcuts import render
from django.contrib.auth.mixins import LoginRequiredMixin
from django.views.generic import ListView, CreateView, UpdateView, DeleteView
from . import forms
from .models import Orders


class OrderCreateView(LoginRequiredMixin, CreateView):
    model = Orders
    template_name = 'orders/order_add_form.html'
    fields = ('order_no', 'person_name', 'company_name',
              'product_name', 'total_weight', 'rate_per_kg', 'percentage_of_fotka', 'percentage_of_moisture',
              'delivery_deadline', 'date_ordered', 'order_status', 'remarks')

    def form_valid(self, form):
        form.instance.added_by = self.request.user
        return super().form_valid(form)


class OrderListView(LoginRequiredMixin, ListView):
    model = Orders
    template_name = 'orders/order_list.html'
    context_object_name = 'orders'
    paginate_by = 20


class OrderUpdateView(LoginRequiredMixin, UpdateView):
    model = Orders
    template_name = 'orders/order_update_form.html'
    fields = '__all__'


class OrderDeleteView(LoginRequiredMixin, DeleteView):
    model = Orders
    template_name = 'orders/order_confirm_delete.html'
    success_url = '/order_list'

我的模板

{% extends "main/base.html" %}
{% load crispy_forms_tags %}
{% block content %}
    <div class="container">
        <h5 class="text-center">Update Order</h5>
        <form method="post" >
            {% csrf_token %}
            <div class="form-row">
            <div class="form-group col-md-6 mb-0">
                {{ form.order_no|as_crispy_field }}
            </div>
                <div class="form-group col-md-6 mb-0">
                {{ form.person_name|as_crispy_field }}
                </div>
                <div class="form-group col-md-6 mb-0">
                {{ form.company_name|as_crispy_field }}
                </div>
                <div class="form-group col-md-6 mb-0">
                {{ form.product_name|as_crispy_field }}
                </div>
                <div class="form-group col-md-6 mb-0">
                {{ form.total_weight|as_crispy_field }}
                </div>
                <div class="form-group col-md-6 mb-0">
                {{ form.rate_per_kg|as_crispy_field }}
                </div>
                <div class="form-group col-md-3 mb-0">
                {{ form.percentage_of_fotka|as_crispy_field }}
                </div>
                <div class="form-group col-md-3 mb-0">
                {{ form.percentage_of_moisture|as_crispy_field }}
                </div>
                <div class="form-group col-md-3 mb-0">
                {{ form.date_ordered|as_crispy_field }}
                </div>
                <div class="form-group col-md-3 mb-0">
                {{ form.delivery_deadline|as_crispy_field }}
                </div>
                <div class="form-group col-md-6 mb-0">
                {{ form.order_status|as_crispy_field }}
                </div>
                <div class="form-group col-md-6 mb-0">
                {{ form.remarks|as_crispy_field }}
                </div>
                <div class="form-group col-md-6 mb-0">
                {{ form.added_by|as_crispy_field }}
                </div>
            </div>
                <button class="btn btn-outline-info" type="submit">Update</button>
        </form>
    </div>
{% endblock content %}

标签： pythondjango

Answer 1

在 settings.py 中设置DATE_INPUT_FORMATS如下：

DATE_INPUT_FORMATS = ['%Y-%m-%d']

或者

尝试这个：

widgets = {
    'delivery_deadline': forms.DateInput(format=('%Y-%m-%d'), attrs={'class':'form-control', 'placeholder':'Select a date', 'type':'date'}),
}