Question

这是我的第一个Django项目，我已经完成了95％的工作。我已经建立了两个模型；学生和签到记录。我有一个视图，该视图传递签入历史记录和一个允许学生签入的表格。然后，模板将呈现签入的学生。如果我使用管理页面更新结帐字段，则该学生将不再出现在主页上。

但是，我仍然沉迷于如何使用网页模板来更新模型中的签出字段。

Image of Project

Model.py

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

# Create your models here.


class Student(models.Model):
    first_name = models.CharField(max_length=30)
    last_name = models.CharField(max_length=30)
    email = models.EmailField(max_length=254)
    student_id = models.IntegerField(max_length=6)
    birth_date = models.IntegerField(max_length=6, default=None)
    photo = models.ImageField(null=True, blank=True, default='default.jpg')


    @property
    def full_name(self):
        return f"{self.first_name} {self.last_name}"

    def __str__(self):
        return self.full_name


class History(models.Model):
    student = models.ForeignKey(Student,on_delete=models.CASCADE)
    # check_in = models.DateTimeField(default=timezone.now)
    check_in = models.DateTimeField(auto_now_add=True)
    check_out = models.DateTimeField(null=True,blank=True)

    @property
    def duration(self):
        if self.check_out is None:
            return str(timezone.now() - self.check_in)[:-10]
        else:
            return str(self.check_out - self.check_in)

    class Meta:
        verbose_name_plural = "History"
        ordering = ['-check_in']

    def __str__(self):
        return f"{self.student.full_name} - {self.duration}"

views.py

from django.shortcuts import render
from .models import History, Student
from .forms import CheckIn

from django.http import HttpResponse
# Create your views here.


def checkin(request):
    if request.method == "GET":
        print(request.GET)
    if request.method == "POST":
        print(request.POST)
        form = CheckIn(request.POST)
        if form.is_valid():
            student_id = form.cleaned_data['student_id']
            birth_date = form.cleaned_data['birth_date']

            for student in Student.objects.all():
                if student.student_id == student_id and student.birth_date == birth_date:
                    check_in = History(student=student)
                    check_in.save()
                    form = CheckIn()
        else:
            print("Not Valid")
            form = CheckIn()
    else:
        form = CheckIn()

    context = {"StudentsChecked": History.objects.all(),
               "form": form}
    return render(request=request, template_name="CheckIn.html", context=context)

谢谢。

使用模板中的操作按钮更新Django模型字段

0 个答案: