我是Django和Python的新手。我正在尝试创建一个保姆数据库,可以具有多个字段的对象之一是教育。我的第一个保姆有2个资格,这会产生错误,并且不会显示。
views.py
from django.shortcuts import render, get_object_or_404, get_list_or_404
from .models import Babysitter, Education, Work, Reference
# Create your views here.
def all_babysitters(request):
babysitters = Babysitter.objects.all()
return render(request, "babysitters.html", {"babysitters": babysitters})
def babysitter_profile(request, id):
"""A view that displays the profile page of a registered babysitter"""
babysitter = get_object_or_404(Babysitter, id=id)
reference = get_object_or_404(Reference)
education = get_object_or_404(Education)
return render(request, "babysitter_profile.html", {'babysitter': babysitter, 'education': education, 'reference': reference} )
models.py
from django.db import models
from datetime import datetime
# Create your models here.
class Babysitter(models.Model):
list_display = ('firstName', 'lastName', 'minderType')
firstName = models.CharField(max_length=50, blank=True, null=True)
lastName = models.CharField(max_length=50, blank=True, null=True)
minderType = models.CharField(max_length=50, blank=True, null=True)
image = models.ImageField(upload_to='images')
phone = models.CharField(max_length=20, blank=True, null=True)
email = models.CharField(max_length=50, blank=True, null=True)
address1 = models.CharField(max_length=100, null=True)
address2 = models.CharField(max_length=100, null=True)
city = models.CharField(max_length=20, null=True)
county = models.CharField(max_length=100, null=True)
eircode = models.CharField(max_length=7, null=True)
biography = models.TextField(max_length=280,blank=True)
def __str__(self):
return self.firstName + ' ' + self.lastName
class Education(models.Model):
babysitter = models.ForeignKey(Babysitter)
school = models.CharField(max_length=50)
qualification = models.CharField(max_length=50)
fieldOfStudy = models.CharField(max_length=50)
dateFrom = models.DateField(auto_now=False, auto_now_add=False)
dateTo = models.DateField(
auto_now=False, auto_now_add=False, null=True, blank=True)
current = models.BooleanField(default=False)
graduated = models.BooleanField(default=False)
def __str__(self):
return self.school
class Work(models.Model):
babysitter = models.ForeignKey(Babysitter)
family = models.CharField(max_length=50)
role = models.CharField(max_length=50)
location = models.CharField(max_length=50)
dateFrom = models.DateField(auto_now=False, auto_now_add=False)
dateTo = models.DateField(
auto_now=False, auto_now_add=False, null=True, blank=True)
current = models.BooleanField(default=False)
def __str__(self):
return self.work
class Reference(models.Model):
babysitter = models.ForeignKey(Babysitter)
refFamily = models.CharField(max_length=50)
contact = models.CharField(max_length=50)
location = models.CharField(max_length=50)
email = models.CharField(max_length=50, blank=True, null=True)
reference = models.CharField(max_length=300)
date = models.DateField(auto_now=False, auto_now_add=False)
def __str__(self):
return self.refFamily
有人可以帮忙吗?我要把头发拔出来。谢谢
答案 0 :(得分:3)
您没有将足够的信息传递给调用以获取参考和教育对象:
babysitter = get_object_or_404(Babysitter, id=id)
reference = get_object_or_404(Reference, babysitter_id=babysitter.id)
education = get_object_or_404(Education, babysitter_id=babysitter.id)
get_object_or_404()函数是在其下方调用get()的快捷方式,而get()
仅返回单个对象(返回多个对象将导致您看到的异常)。 / p>
如果您想看到多个对象,则不要使用get_object_or_404
快捷方式(我个人认为这些“快捷方式”方法很难看)。相反,将其更改为:
education_qs = Education.objects.filter(babysitter_id=babysitter.id)
然后循环遍历该查询集以获取结果:
for ed in education_qs:
# Get some data
school = ed.school
如果更容易,您可以在HTML模板中循环查询集。
更新:这是一个更好的答案,显示了如何使用查询集:
def babysitter_profile(request, id):
"""A view that displays the profile page of a registered babysitter"""
babysitter = get_object_or_404(Babysitter, id=id)
reference_qs = Reference.objects.filter(babysitter_id=babysitter.id)
education_qs = Education.objects.filter(babysitter_id=babysitter.id)
return render(request, "babysitter_profile.html", {
'babysitter': babysitter,
'education_qs': education_qs,
'reference_qs': reference_qs}
)
然后,您可以在HTML模板中执行以下操作,以显示保姆参加的学校(在项目符号列表中):
<ul>
{% for ed in education_qs %}
<li>{{ ed.school }}</li>
{% endfor %}
</ul>
您可以对参考数据执行类似的操作。
答案 1 :(得分:1)
我认为您应该设置一些parameters
来获取特定的对象,而不是获取一堆对象。
就像做get_object_or_404
的第一个实例一样。
reference = get_object_or_404(Reference,id=xx)
education = get_object_or_404(Education,id=yy)
答案 2 :(得分:1)
get_object_or_404仅返回1个对象。如果保姆的资格为“ 2”,请使用get_list_or_404,以防止发生异常。
babysitter = get_object_or_404(Babysitter, id=id)
education = get_list_or_404(Education, id=babysitter.id)
为防止发生MultipleObjectReturned
异常。