Django的ModelForm

1. form

   from django import forms
   from django.core.exceptions import  ValidationError
   
   class RegForm(forms.Form):
       name = forms.CharField(
           required = True,
           min_length =6,
           label = '姓名',
           error_messages = {
               'required':'不能为空'，
               'invalid':'格式不正确'
           }
       	)
       password = forms.CharField(widget=forms.PassworInput())
       gender = forms.ChoicesField(choices=((1,'男'),(2,'女')))
       
       
       #局部钩子
   	def clean_name(self)：
       	# 通过校验  返回正确的值
           # 不通过校验  抛出异常  raise ValidationError('错误信息')
       # 全局钩子
       def clean(self):
           # 通过校验  返回self.cleaned_data
           # 不通过校验 
           # 自己将错误信息添加到指定字段 self.add_error(’‘,'错误信息' )
   	    # 抛出异常  raise ValidationError('错误信息')
       
   # 视图中使用：
   form_obj = RegForm()
   
   form_obj = RegForm(request.POST)
   form_obj.is_valid()
   form_obj.fields  #  有序字典  name:字段的对象
   # 模板中使用：
   {{ form_obj.as_p }}
   {{ form_obj.errors }}
   {{ form_obj.name }}
   {{ form_obj.name.label }}
   {{ form_obj.name.id_for_label }}  
   {{ form_obj.name.errors }}  {{ form_obj.name.errors.0 }}  
   
   

2. modelform

from django import forms
from app01 import models

class RegForm(forms.ModelForm):
    re_password = forms.CharField(widget=forms.PassworInput())
    
    class Meta:
        model = models.User
        fields = '__all__'   #   ['name','password']
        exclude = ['name']
        labels = {
            'name':'姓名'    # 直接给model中的字段加verbose_name 
        }
        error_messages={
            'name' = {
                     }
        }
        widgets = {
            'password':widget=forms.PassworInput(attrs={'class':'form-control'})           
        }
   	def __init__(self,*args,**kwargs):
        super().__init__(*args,**kwargs)
        for field in self.fields.values():
            field.widget.attrs.update({'class':'form-control'})
        
        
# 视图中使用：
form_obj = RegForm(request.POST)
form_obj.is_valid():
    form_obj.save()