08.form组件

Posted 2021-01-04 qql-anatkh

form组件

在需要使用用户认证组件的app下创建my_form.py

# my_form.py
from django.forms import widgets  # 用于规定type
from django import forms  # forms组件
from blog.models import UserInfo  # 引入表进行创建钩子
from django.core.exceptions import ValidationError  # 钩子捕获异常

class UserForm(forms.Form):
    user = forms.CharField(max_length=32, label="用户名", widget=widgets.TextInput(attrs={"class": "form-control"}),
                           error_messages={"required": "该字段不能为空"})
    pwd = forms.CharField(max_length=32, label="密码", widget=widgets.PasswordInput(attrs={"class": "form-control"}),
                          error_messages={"required": "该字段不能为空"})
    re_pwd = forms.CharField(max_length=32, label="确认密码", widget=widgets.PasswordInput(attrs={"class": "form-control"}),
                             error_messages={"required": "该字段不能为空"})
    email = forms.EmailField(max_length=32, label="邮箱", widget=widgets.EmailInput(attrs={"class": "form-control"}),
                             error_messages={"required": "该字段不能为空"})

    # 二次校验
    def clean_user(self):
        user = self.cleaned_data.get("user")

        userinfo = UserInfo.objects.filter(username=user).first()

        if not userinfo:
            return user
        else:  # 已有人注册过了

            raise ValidationError("该用户已被注册")  # 一定要用raise ValidationError("xxxxx")

    def clean(self):  # 全局钩子,键__all__
        pwd = self.cleaned_data.get("pwd")  # 所有干净的字段以及对应的值的字典
        re_pwd = self.cleaned_data.get("re_pwd")

        # 有多个错误信息需要再多一个判断
        if pwd and re_pwd:  # 两个都有值时
            if pwd.upper() == re_pwd.upper():
                return self.cleaned_data
            else:
                raise ValidationError("两次密码不一致")
        else:
            return self.cleaned_data


# register.html
{% for field in form %}
    <div class="form-group">
        <label for="{{ field.auto_id }}">{{ field.label }}</label>#.auto_id生成id_field，用于label对应input的id
        {{ field }} <span class="error pull-right"></span>
    </div>
{% endfor %}


#views.register
if form.is_valid():  # 如果有值
    response["user"] = form.cleaned_data.get("user")

    # 生成用户信息
    user = form.cleaned_data.get("user")
    pwd = form.cleaned_data.get("pwd")
    email = form.cleaned_data.get("email")
    avatar_obj = request.FILES.get("avatar")  # 拿头像
    print(form.cleaned_data)
    # 代码优化
    extra = {}  # 扩展字段
    if avatar_obj:  # 如果用户传了头像
        extra["avatar"] = avatar_obj  # 扩展字段赋值给字典

    UserInfo.objects.create_user(username=user, password=pwd, email=email, **extra)  # 传字典**{}

else:  # 如果没有值，则说明有错误form.errors拿到所有错误的字典
    print(form.cleaned_data)
    print(form.errors)
    response["msg"] = form.errors