forms组件如何在Django中使用-创新互联

class UserInfo(models.Model):
  name=models.CharField(max_length=32)
  pwd=models.CharField(max_length=32)
  email=models.EmailField()
  tel=models.CharField(max_length=32)

  
  





  {% csrf_token %} 
  

    用户名
    

  
  

    密码
    

  
  

    确认密码
    

  
   

    邮箱
    

  
  

# forms组件
from django.forms import widgets

wid_01=widgets.TextInput(attrs={"class":"form-control"})
wid_02=widgets.PasswordInput(attrs={"class":"form-control"})

class UserForm(forms.Form):
  name=forms.CharField(max_length=32,
             widget=wid_01
             )
  pwd=forms.CharField(max_length=32,widget=wid_02)
  r_pwd=forms.CharField(max_length=32,widget=wid_02)
  email=forms.EmailField(widget=wid_01)
  tel=forms.CharField(max_length=32,widget=wid_01)

def register(request):

  if request.method=="POST":
    form=UserForm(request.POST)
    if form.is_valid():
      print(form.cleaned_data)    # 所有干净的字段以及对应的值
    else:
      print(form.cleaned_data)    #
      print(form.errors)       # ErrorDict : {"校验错误的字段":["错误信息",]}
      print(form.errors.get("name")) # ErrorList ["错误信息",]
    return HttpResponse("OK")
  form=UserForm()
  return render(request,"register.html",locals())

  
  
  
  


注册页面

  
    

        
          {% csrf_token %}
          

            用户名
            {{ form.name }}
          
          

            密码
            {{ form.pwd }}
          
          

            确认密码
            {{ form.r_pwd }}
          
          

             邮箱
            {{ form.email }}
          

          
        
    

渲染方式2

          {% csrf_token %}

          {% for field in form %}
            

              {{ field.label }}
              {{ field }}
            
          {% endfor %}
          

渲染方式3

  {% csrf_token %}

  {{ form.as_p }}
  

2，显示错误与重置输入信息功能

视图

def register(request):

  if request.method=="POST":
    form=UserForm(request.POST)
    if form.is_valid():
      print(form.cleaned_data)    # 所有干净的字段以及对应的值
    else:
      print(form.cleaned_data)    #
      print(form.errors)       # ErrorDict : {"校验错误的字段":["错误信息",]}
      print(form.errors.get("name")) # ErrorList ["错误信息",]
    return render(request,"register.html",locals())
  form=UserForm()
  return render(request,"register.html",locals())

模板

  {% csrf_token %}

  {% for field in form %}
    

      {{ field.label }}
      {{ field }} {{ field.errors.0 }}
    
  {% endfor %}
  

3，局部钩子与全局钩子

模板

# forms组件
from django.forms import widgets

wid_01=widgets.TextInput(attrs={"class":"form-control"})
wid_02=widgets.PasswordInput(attrs={"class":"form-control"})

from django.core.exceptions import ValidationError
class UserForm(forms.Form):
  name=forms.CharField(max_length=32,
             widget=wid_01
             )
  pwd=forms.CharField(max_length=32,widget=wid_02)
  r_pwd=forms.CharField(max_length=32,widget=wid_02)
  email=forms.EmailField(widget=wid_01)
  tel=forms.CharField(max_length=32,widget=wid_01)

  # 局部钩子
  def clean_name(self):
    val=self.cleaned_data.get("name")
    if not val.isdigit():
      return val
    else:
      raise ValidationError("用户名不能是纯数字!")

  # 全局钩子

  def clean(self):
    pwd=self.cleaned_data.get("pwd")
    r_pwd=self.cleaned_data.get("r_pwd")

    if pwd==r_pwd:
      return self.cleaned_data
    else:
      raise ValidationError('两次密码不一致!')

def register(request):

  if request.method=="POST":
    form=UserForm(request.POST)
    if form.is_valid():
      print(form.cleaned_data)    # 所有干净的字段以及对应的值
    else:
      clean_error=form.errors.get("__all__")

    return render(request,"register.html",locals())
  form=UserForm()
  return render(request,"register.html",locals())

视图

      {% csrf_token %}

      {% for field in form %}
        

          {{ field.label }}
          {{ field }}
          
             {% if field.label == 'R pwd' %}
             {{ clean_error.0 }}
             {% endif %}
             {{ field.errors.0 }}
          
        
      {% endfor %}
      

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