今天学到的新知识

class TeacherForm(Form):  #必须继承Form
    # 创建字段，本质上是正则表达式
    username = fields.CharField(
        required=True,     #必填字段
        error_messages={"required":"用户名不能为空！！"},  #显示中文错误提示
        widget=widgets.TextInput(attrs={"placeholder":"用户名","class":"form-control"}),  #自动生成input框
        label="姓名",
        label_suffix=":"
       )
    password = fields.CharField(required=True, error_messages={‘required‘: ‘密码不能为空‘},
                                widget=widgets.PasswordInput(attrs={‘placeholder‘: ‘密码‘, ‘class‘: ‘form-control‘}),
                                label="密码",
                                label_suffix=":"
      )  # 不能为空

    email = fields.EmailField(
        required=True,
        error_messages={"required":"邮箱不能为空！！","invalid":"无效的邮箱"},
        widget=widgets.EmailInput(attrs={"placeholder": "邮箱", "class": "form-control"}),  # 自动生成input框
        label = "邮箱",
        label_suffix = ":"
    ) #不能为空且邮箱格式要一致

from django.core.exceptions import ValidationError

from django.conf import settings