當前位置：首頁 > 编程语言 > python >内容正文

python

Python 【第十三章】 Django 之 FORM

發布時間：2025/7/25 python 26 豆豆

生活随笔收集整理的這篇文章主要介紹了 Python 【第十三章】 Django 之 FORM 小編覺得挺不錯的,現在分享給大家,幫大家做個參考.

不涉及數據庫存儲數據例一：FORM ?實現頁面下拉選擇框：

url.py

from django.conf.urls import url from django.contrib import admin from app01 import viewsurlpatterns = [# 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 formsclass 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>

涉及數據庫存儲數據例二：通過models.py 一對一外表關聯方式來實現

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')

創建數據庫表執行以下兩個語句：

python manage.py makemigrations python manage.py migrate

views.py ?通過循環來生成數據

from django.shortcuts import render # from django.shortcuts import HttpResponse from app01 import models from django import formsclass Indexform(forms.Form):c = { (1,'CEO'), (2,'COO') }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})

生成數據后，修改viiews.py

from django.shortcuts import render # from django.shortcuts import HttpResponse from app01 import models from django import formsclass Indexform(forms.Form):# c = {# (1,'CEO'),# (2,'COO')# }c = models.UserType.objects.all().values_list('id','caption') #該名在數據庫有數據后出現，就不會有出錯如果數據庫在沒有數據時，該語句查不到數據，會報錯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>

?遇到問題，如果在數據庫中繼續添加新數據，會出現頁面沒有顯示新數據，如果顯示，需要重啟django

以下方法是解決上述問題

views.py

from django.shortcuts import render from django.shortcuts import HttpResponse from app01 import models from django import formsclass Indexform(forms.Form):# c = {# (1,'CEO'),# (2,'COO')# }c = models.UserType.objects.all().values_list('id','caption') # 類中靜態字段原理，由類直接調用user_type_id = forms.IntegerField(widget=forms.Select(choices=c))def __init__(self,*args, **kwargs):# 父類構造方法：1、獲取所有靜態字段 2、fields = []super(Indexform, self).__init__(*args, **kwargs)# print(self.fields['user_type_id'].widget.choices)self.fields['user_type_id'].widget.choices = models.UserType.objects.all().values_list('id','caption')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})def add_user_type(request):q = request.GET.get('q', None)if q:models.UserType.objects.create(caption=q)return HttpResponse(q)

url.py

from django.conf.urls import url from django.contrib import admin from app01 import viewsurlpatterns = [# url(r'^admin/', admin.site.urls),url(r'^index/',views.index),url(r'^add_user_type/',views.add_user_type), ]

add_user_type.html

?測試添加數據

http://127.0.0.1:8000/add_user_type/?q=yangjian

實現實時添加新數據

轉載于:https://www.cnblogs.com/yaabb163/p/6354050.html

總結

以上是生活随笔為你收集整理的Python 【第十三章】 Django 之 FORM的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。