Django Form 组件

Posted 2020-12-31 haowen980

 

Django Form

Django中为用户定义了一个django.forms库，这个库可以方便的进行form类的数据显示及数据验证，省去了很多用户的代码。django.forms库用起来也方便，只需要在html文件中需要增加<form>tag时，定义相应的Form类就可以。在以下的实例中，我们最终的页面上只有一个<form> tag， 所以我们只需要定义一个Form类即可。Django 社区的惯例是把Form类单独放在一个forms.py文件中，我们最好也遵循这个规则。创建diskforms.py文件，并写入

 

新建一个项目

from django.db import models

class Depart(models.Model):
    caption = models.CharField(max_length=32)

    def __str__(self):
        return self.caption
class Role(models.Model):
    title = models.CharField(max_length=32)

    def __str__(self):
        return self.title

class User(models.Model):

    name = models.CharField(verbose_name=‘姓名‘,max_length=32)
    depart = models.ForeignKey(verbose_name=‘部门‘,to=‘Depart‘,on_delete=models.CASCADE)

    gender_choices = (
        (1,‘男‘),
        (2,‘女‘),
    )
    gender = models.IntegerField(verbose_name=‘性别‘,choices=gender_choices,default=1)

    roles = models.ManyToManyField(verbose_name=‘角色‘,to=‘Role‘)

models.py

 1 from django.shortcuts import render,redirect
 2 from app01 import models
 3 
 4 def user_list(request):
 5     user_queryset = models.User.objects.all()
 6     return render(request,‘user_list.html‘,{‘user_queryset‘:user_queryset})
 7 
 8 from django import forms
 9 class UserForm(forms.ModelForm):
10     class Meta:
11         model = models.User
12         fields = ‘__all__‘
13         # fields = ‘__all__‘
14         # widgets = {
15         #     ‘name‘:forms.TextInput(attrs={‘class‘:‘form-control‘}),
16         #     ‘depart‘:forms.Select(attrs={‘class‘:‘form-control‘}),
17         #     ‘gender‘:forms.Select(attrs={‘class‘:‘form-control‘}),
18         #     ‘roles‘:forms.SelectMultiple(attrs={‘class‘:‘form-control‘}),
19         # }
20         error_messages = {
21             ‘name‘:{
22                 ‘required‘:‘用户名不能为空‘
23             }
24         }
25 
26 
27 def user_add(request):
28     if request.method == "GET":
29         form = UserForm()
30     else:
31         form = UserForm(request.POST)
32         if form.is_valid():
33             print(‘通过验证‘)
34             form.save()
35             return redirect(‘/user/list/‘)
36     return render(request, ‘user_add.html‘, {‘form‘: form})

views.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‘^user/list/$‘,views.user_list),
    url(r‘^user/add/$‘,views.user_add),
]

urls.py