标签:ble form ida length png go import div for cts
顾名思义,Model + Form == ModelForm。model和form的合体,所以有以下功能:
model有操作数据库的字段,form验证也有那几个字段,虽然耦合度降低,但是代码是有重复的。如果利用model里的字段,那是不是form里的字段就不用写了。
1、models.py文件
class UserType(models.Model): caption = models.CharField(max_length=32) class User(models.Model): username = models.CharField(max_length=32) email = models.EmailField(max_length=32) #指定关系一对多,指定哪张表,指定哪个字段 user_type = models.ForeignKey(to=‘UserType‘,to_field=‘id‘)
2、forms.py文件
from django import forms from django.forms import fields class UserInfoForm(forms.Form): username = fields.CharField(max_length=32) email = fields.EmailField(max_length=32) user_type = fields.ChoiceField( choices=models.UserType.objects.values_list(‘id‘,‘caption‘) ) # 下面的操作是让数据在网页上实时更新。 def __init__(self, *args, **kwargs): super(UserInfoForm,self).__init__(*args, **kwargs) self.fields[‘user_type‘].choices = models.UserType.objects.values_list(‘id‘,‘caption‘)
3、前端文件index.html
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> </head> <body> <form action="/index/" method="POST" novalidate="novalidate"> {% csrf_token %} {{ obj.as_p }} <input type="submit" value="提交"> </form> <table> <th> <tr>用户名</tr> <tr>邮箱</tr> <tr>角色</tr> </th> {% for obj in new_obj %} <tr> <td>{{ obj.username }}</td> <td>{{ obj.email }}</td> <td>{{ obj.user_type.caption }}</td> </tr> {% endfor %} </table> </body> </html>
4、效果
POST提交数据:
GET方式:
标签:ble form ida length png go import div for cts
原文地址:https://www.cnblogs.com/skyflask/p/9710809.html