不涉及数据库存储数据例一 ：FORM 实现页面下拉选择框：
url.py
from django.conf.urls import url
from django.contrib import admin
from app01 import views
urlpatterns = [
# url(r‘^admin/‘, admin.site.urls),
url(r‘^index/‘,views.index),
]
views.py
from django.shortcuts import render
from django.shortcuts import HttpResponse
from app01 import models
from django import forms
class Indexform(forms.Form):
c = {
(1,‘CEO‘),
(2,‘COO‘)
}
user_type_id = forms.IntegerField(widget=forms.Select(choices=c))
def index(request):
form = Indexform()
return render(request,‘index.html‘,{‘form‘:form})
index.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title></title>
</head>
<body>
<h1>index</h1>
{{ form.user_type_id }}
</body>
</html>
涉及数据库存储数据例二：通过models.py 一对一外表关联方式来实现
models.py
from django.db import models
# Create your models here.
class UserType(models.Model):
caption = models.CharField(max_length=16)
class UserInfo(models.Model):
user = models.CharField(max_length=32)
pwd = models.CharField(max_length=32)
user_type = models.ForeignKey(‘UserType‘)
创建数据库表执行以下两个语句：
python manage.py makemigrations python manage.py migrate
views.py 通过循环来生成数据
from django.shortcuts import render
# from django.shortcuts import HttpResponse
from app01 import models
from django import forms
class Indexform(forms.Form):
# c = {
# (1,‘CEO‘),
# (2,‘COO‘)
# }
c = models.UserType.objects.all().values_list(‘id‘,‘caption‘)
user_type_id = forms.IntegerField(widget=forms.Select(choices=c))
def index(request):
for i in range(10):
models.UserType.objects.create(caption=‘CE‘+str(i))
c = models.UserType.objects.all().count()
print(c)
form = Indexform()
return render(request,‘index.html‘,{‘form‘:form})
生成 数据后，修改viiews.py
from django.shortcuts import render
# from django.shortcuts import HttpResponse
from app01 import models
from django import forms
class Indexform(forms.Form):
# c = {
# (1,‘CEO‘),
# (2,‘COO‘)
# }
c = models.UserType.objects.all().values_list(‘id‘,‘caption‘)
user_type_id = forms.IntegerField(widget=forms.Select(choices=c))
def index(request):
# for i in range(10):
# models.UserType.objects.create(caption=‘CE‘+str(i))
# c = models.UserType.objects.all().count()
# print(c)
form = Indexform()
return render(request,‘index.html‘,{‘form‘:form})
index.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title></title>
</head>
<body>
<h1>index</h1>
{{ form.user_type_id }}
</body>
</html>
遇到问题，如果在数据库中继续添加新数据，会出现页面没有显示 新数据，如果显示 ，需要重启django
以下方法是解决上述问题
时间： 2024-08-01 10:41:23