[django] Form验证

Django form组件的主要功能如下:

• 生成页面可用的HTML标签
• 对用户提交的数据进行校验
• 保留上次输入内容

1. 创建Form类

   from django.forms import Form
   from django.forms import widgets
   from django.forms import fields
    
   class MyForm(Form):
       user = fields.CharField(
           widget=widgets.TextInput(attrs={'id': 'i1', 'class': 'c1'})
       )
    
       gender = fields.ChoiceField(
           choices=((1, '男'), (2, '女'),),
           initial=2,
           widget=widgets.RadioSelect
       )
    
       city = fields.CharField(
           initial=2,
           widget=widgets.Select(choices=((1,'上海'),(2,'北京'),))
       )
    
       pwd = fields.CharField(
           widget=widgets.PasswordInput(attrs={'class': 'c1'}, render_value=True)
       )
   

2. View函数处理

   from django.shortcuts import render, redirect
   from .forms import MyForm
    
    
   def index(request):
       if request.method == "GET":
           obj = MyForm()
           return render(request, 'index.html', {'form': obj})
       elif request.method == "POST":
           obj = MyForm(request.POST, request.FILES)
           if obj.is_valid():
               values = obj.clean()
               print(values)
           else:
               errors = obj.errors
               print(errors)
           return render(request, 'index.html', {'form': obj})
       else:
           return redirect('http://www.google.com')
   

3. 生成HTML

   <form action="/" method="POST" enctype="multipart/form-data">
       <p>{{ form.user }} {{ form.user.errors }}</p>
       <p>{{ form.gender }} {{ form.gender.errors }}</p>
       <p>{{ form.city }} {{ form.city.errors }}</p>
       <p>{{ form.pwd }} {{ form.pwd.errors }}</p>
       <input type="submit"/>
   </form>
   
   
   <form method="POST" enctype="multipart/form-data">
       {% csrf_token %}
       
           {{ form.xxoo.label }}
           {{ form.xxoo.id_for_label }}
           {{ form.xxoo.label_tag }}
           {{ form.xxoo.errors }}
           <p>{{ form.user }} {{ form.user.errors }}</p>
           <input type="submit" />
   </form>
   

https://www.cnblogs.com/liwenzhou/p/8747872.html
https://www.cnblogs.com/wupeiqi/articles/6144178.html