Python - Django - form 组件自定义校验
reg2.html：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>注册页面</title>
<link rel="stylesheet" href="/static/bootstrap/css/bootstrap.min.css">
</head>
<body>
<div class="container">
<div class="row">
<div class="col-md-6 col-md-offset-3">
<form action="/reg2/" method="post" novalidate>
{% csrf_token %}
<div class="form-group {% if form_obj.username.errors.0 %}has-error{% endif %}">
{{ form_obj.username.label }}
{{ form_obj.username }}
<span class="help-block">{{ form_obj.username.errors.0 }}</span>
</div>
<div class="form-group {% if form_obj.password.errors.0 %}has-error{% endif %}">
{{ form_obj.password.label }}
{{ form_obj.password }}
<span class="help-block">{{ form_obj.password.errors.0 }}</span>
</div>
<div class="form-group {% if form_obj.re_password.errors.0 %}has-error{% endif %}">
{{ form_obj.re_password.label }}
{{ form_obj.re_password }}
<span class="help-block">{{ form_obj.re_password.errors.0 }}</span>
</div>
<div class="form-group {% if form_obj.mobile.errors.0 %}has-error{% endif %}">
{{ form_obj.mobile.label }}
{{ form_obj.mobile }}
<span class="help-block">{{ form_obj.mobile.errors.0 }}</span>
</div>
<p><input type="submit" class="btn btn-default"></p>
</form>
</div>
</div>
</div>
</body>
</html>
查看 forms.py 的源码
如果有个函数以 clean_ 开头，而名字后面跟的是 cleaned_data 的 key，就会执行该函数
views.py：
from django.shortcuts import render, HttpResponse
from app01 import models
from django import forms
from django.forms import widgets
from django.core.validators import RegexValidator
from django.core.exceptions import ValidationError
class RegForm(forms.Form):
username = forms.CharField(
min_length=5,
label="用户名",
error_messages={
"min_length": "用户名不能小于5位！",
"required": "该字段不能为空"
},
widget=widgets.TextInput(attrs={"class": "form-control"})
)
password = forms.CharField(
min_length=6,
label="密码",
error_messages={
"min_length": "密码不能少于6位！",
"required": "该字段不能为空"
},
widget=widgets.PasswordInput(attrs={"class": "form-control"}, render_value=True)
)
re_password = forms.CharField(
min_length=6,
label="确认密码",
error_messages={
"required": "该字段不能为空"
},
widget=widgets.PasswordInput(attrs={"class": "form-control"}, render_value=True)
)
mobile = forms.CharField(
label="手机号",
# 自定义正则匹配规则
validators=[
RegexValidator(r'^[0-9]+$', "手机号必须是数字"), # 判断手机号是否为数字
RegexValidator(r'^1[3-9][0-9]{9}$', "手机格式有误") # 判断手机号是否为 1 和 3-9 开头的十一位数
],
error_messages={
"required": "该字段不能为空",
},
widget=widgets.TextInput(attrs={"class": "form-control"})
)
# 判断用户名信息
def clean_username(self):
value = self.cleaned_data.get("username")
if "admin" in value:
raise ValidationError("用户名不能含有敏感信息")
def reg2(request):
form_obj = RegForm() # GET 请求
if request.method == "POST":
form_obj = RegForm(request.POST)
# 让 form 来帮我们进行校验
if form_obj.is_valid():
# 如果通过校验
# 所有经过校验的数据都保存在 form_obj.cleaned_data
print(form_obj.cleaned_data)
models.UserInfo.objects.create(**form_obj.cleaned_data)
return HttpResponse("注册成功")
return render(request, "reg2.html", {"form_obj": form_obj})
在 form 类中添加了一个 clean_username 函数来判断处理 username
运行结果：
重写父类的 clean 方法：
查看 forms.py 中的源码
这里的 clean 方法只在最后的时候返回了 cleaned_data，中间也没有什么操作
views.py：
from django.shortcuts import render, HttpResponse
from app01 import models
from django import forms
from django.forms import widgets
from django.core.validators import RegexValidator
from django.core.exceptions import ValidationError
class RegForm(forms.Form):
username = forms.CharField(
min_length=5,
label="用户名",
error_messages={
"min_length": "用户名不能小于5位！",
"required": "该字段不能为空"
},
widget=widgets.TextInput(attrs={"class": "form-control"})
)
password = forms.CharField(
min_length=6,
label="密码",
error_messages={
"min_length": "密码不能少于6位！",
"required": "该字段不能为空"
},
widget=widgets.PasswordInput(attrs={"class": "form-control"}, render_value=True)
)
re_password = forms.CharField(
min_length=6,
label="确认密码",
error_messages={
"required": "该字段不能为空"
},
widget=widgets.PasswordInput(attrs={"class": "form-control"}, render_value=True)
)
mobile = forms.CharField(
label="手机号",
# 自定义正则匹配规则
validators=[
RegexValidator(r'^[0-9]+$', "手机号必须是数字"), # 判断手机号是否为数字
RegexValidator(r'^1[3-9][0-9]{9}$', "手机格式有误") # 判断手机号是否为 1 和 3-9 开头的十一位数
],
error_messages={
"required": "该字段不能为空",
},
widget=widgets.TextInput(attrs={"class": "form-control"})
)
# 判断用户名信息
def clean_username(self):
value = self.cleaned_data.get("username")
if "admin" in value:
raise ValidationError("用户名不能含有敏感信息")
# 重写父类的 clean 方法
def clean(self):
password = self.cleaned_data.get("password")
re_password = self.cleaned_data.get("re_password")
if re_password != password:
self.add_error("password", ValidationError("两次密码不一致"))
self.add_error("re_password", ValidationError("两次密码不一致"))
raise ValidationError("两次密码不一致")
return self.cleaned_data
def reg2(request):
form_obj = RegForm() # GET 请求
if request.method == "POST":
form_obj = RegForm(request.POST)
# 让 form 来帮我们进行校验
if form_obj.is_valid():
# 如果通过校验
# 所有经过校验的数据都保存在 form_obj.cleaned_data
print(form_obj.cleaned_data)
models.UserInfo.objects.create(**form_obj.cleaned_data)
return HttpResponse("注册成功")
return render(request, "reg2.html", {"form_obj": form_obj})
在 form 类中重构父类的 clean 方法，来对密码部分进行校验
如果两次的密码不同，运行结果：
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