Python 第十三章 Django 之 FORM
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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
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