网站服务器查询,所有外包网站,软件设计模式,做网站开发的经营范围django表单#xff1a; 渲染表单模板。表单验证数据是否合法。 在App中新建的form.py表单文件#xff1a; 1 from django import forms2 from django.core import validators3 from .models import User4 5 # 定义form表单#xff0c;label:定义名字#xff1b;error_messa… django表单 渲染表单模板。表单验证数据是否合法。 在App中新建的form.py表单文件 1 from django import forms2 from django.core import validators3 from .models import User4 5 # 定义form表单label:定义名字error_messages:定义错误时内容的提示例16 class MesssageBoardForm(forms.Form):7 title forms.CharField(max_length10,min_length2,label标题,error_messages{min_length:最小不能少于两个字符,max_length:不能超过十个字符})8 content forms.CharField(widgetforms.Textarea,label内容,error_messages{required:必须传content字段})9 email forms.EmailField(label邮箱,error_messages{required:必须传email字段})
10 reply forms.BooleanField(requiredFalse,label是否回复)
11
12 # 可简化出错信息显示的内容通用。
13 class BaseForm(forms.Form):
14 def get_errors(self):
15 errors self.errors.get_json_data()
16 new_errors {}
17 for key,message_dicts in errors.items():
18 messages []
19 for message_dict in message_dicts:
20 message message_dict[message]
21 messages.append(message)
22 new_errors[key] messages
23 return new_errors
24
25 # 进行注册信息的简单验证表单例2
26 class RegisterForm(BaseForm):
27 username forms.CharField(max_length20,min_length2)
28 telephone forms.CharField(validators[validators.RegexValidator(r1[345678]\d{9},message请输入正确的手机号码)])
29 pwd1 forms.CharField(max_length16,min_length6,error_messages{max_length:不能超过十六个字符,min_length:不能小于六个字符})
30 pwd2 forms.CharField(max_length16,min_length6,error_messages{max_length:不能超过十六个字符,min_length:不能小于六个字符})
31
32 def clean_telephone(self):
33 telephone self.cleaned_data.get(telephone)
34 exists User.objects.filter(telephonetelephone).exists()
35 if exists:
36 raise forms.ValidationError(message%s已经被注册%telephone)
37 return telephone
38
39 def clean(self):
40 cleaned_data super().clean()
41 pwd1 cleaned_data.get(pwd1)
42 pwd2 cleaned_data.get(pwd2)
43 if pwd1 ! pwd2:
44 raise forms.ValidationError(message两次密码不一致) 视图文件 1 from django.shortcuts import render2 from django.views.generic import View3 from .forms import MesssageBoardForm,RegisterForm4 from django.http import HttpResponse5 from .models import User6 7 # 简单的表格格式例18 class IndexView(View):9 # 将form传给html模板来生成一个表单的html代码
10 # 使用form生成的代码填写格式与验证不对时会先提示不运行
11 def get(self,request):
12 form MesssageBoardForm()
13 return render(request,index.html,context{form:form})
14
15 # post提交时使用form.is_valid判断提交的内容与form中定义的是否一致
16 # cleaned_data获取相应数据
17 def post(self,request):
18 form MesssageBoardForm(request.POST)
19 if form.is_valid():
20 title form.cleaned_data.get(title)
21 content form.cleaned_data.get(content)
22 email form.cleaned_data.get(email)
23 reply form.cleaned_data.get(reply)
24 print(title)
25 print(content)
26 print(email)
27 print(reply)
28 return HttpResponse(success)
29 else:
30 # 打印出错的详细内容
31 print(form.errors.get_json_data())
32 return HttpResponse(Fail)
33
34 # 注册信息的验证例2
35 class RegisterView(View):
36 # 返回注册页面模板
37 # 不使用form的表单生成的代码验证不对时仍会运行没有预先提示
38 def get(self,request):
39 return render(request,register.html)
40
41 # 提交注册的数据
42 def post(self,request):
43 form RegisterForm(request.POST)
44 # 验证通过
45 if form.is_valid():
46 username form.cleaned_data.get(username)
47 telephone form.cleaned_data.get(telephone)
48 User.objects.create(usernameusername,telephonetelephone)
49 return HttpResponse(注册成功)
50 else:
51 print(form.errors.get_json_data())
52 # 调用了BaseFrom模板后简化的出错信息
53 print(form.get_errors())
54 return HttpResponse(注册失败) 例1模板 1 {# 简单的index.html模板 #}2 form action methodpost3 table4 {{ form.as_table }}5 tr6 td/td7 tdinput typesubmit value提交/td8 /tr9 /table
10 /form 例2模板 1 {# 注册验证的模板 register.html #}2 form action methodpost3 table4 tr5 td用户/td6 tdinput typetext nameusername/td7 /tr8 tr9 td电话/td
10 tdinput typetext nametelephone/td
11 /tr
12 tr
13 td密码/td
14 tdinput typepassword namepwd1/td
15 /tr
16 tr
17 td重复密码/td
18 tdinput typepassword namepwd2/td
19 /tr
20 tr
21 td/td
22 tdinput typesubmit value提交/td
23 /tr
24 /table
25 /form 例2 models.py 1 from django.db import models
2
3 class User(models.Model):
4 username models.CharField(max_length20)
5 telephone models.CharField(max_length11) url映射 1 urlpatterns [
2 path(, views.IndexView.as_view()),
3 path(register/,views.RegisterView.as_view()) ModelForm 在表单中使用 ModelForm 定义一个 Meta 类如在该类中指定 modelUser 以及 fields__all__ 等于将 User 模型中所有的字段都复制过来进行验证。则不需要在表单中重复模型中已有的字段减少代码。 models.py文件 1 from django.db import models
2 from django.core import validators
3
4 class User(models.Model):
5 username models.CharField(max_length100,validators[validators.MinLengthValidator(2)])
6 password models.CharField(max_length16,validators[validators.MinLengthValidator(6)])
7 telephone models.CharField(max_length11,validators[validators.RegexValidator(r1[345678]\d{9})]) forms.py文件 1 from django import forms2 from .models import User3 4 # 注册信息的验证5 class BaseForm(forms.ModelForm):6 # 验证手机号是否存在7 def clean_telephone(self):8 telephone self.cleaned_data.get(telephone)9 exists User.objects.filter(telephonetelephone).exists()
10 if exists:
11 raise forms.ValidationError(%s手机号已存在 % telephone)
12 return telephone
13
14 # 验证用户名
15 def clean_username(self):
16 username self.cleaned_data.get(username)
17 exists User.objects.filter(usernameusername).exists()
18 if exists:
19 raise forms.ValidationError(%s:用户名已被注册 % username)
20 return username
21
22 # 验证密码
23 def clean(self):
24 cleaned_data super().clean()
25 pwd1 cleaned_data.get(pwd1)
26 pwd2 cleaned_data.get(pwd2)
27 if pwd1 ! pwd2:
28 raise forms.ValidationError(两次密码不一样)
29 else:
30 return cleaned_data
31
32 # 定义一个Meta类
33 class RegisterForm(BaseForm):
34 pwd1 forms.CharField(max_length16,min_length6,error_messages{min_length:不能小于6字符,max_length:不能大于16字符})
35 pwd2 forms.CharField(max_length16,min_length6,error_messages{min_length:不能小于6字符,max_length:不能大于16字符})
36
37 class Meta:
38 model User
39 # fields [username,telephone] # 只提取某些字段
40 # fields __all__ # 复制所有的字段
41 exclude [password] # 排除某个字段
42 # 使用“errors_messages”定义错误信息
43 error_messages {
44 username:{
45 max_length:不能超过100字符,
46 min_length:不能小于2字符
47 },
48 telephone:{
49 invalid:请输入正确的手机号码
50 }
51 } views.py文件 1 from django.shortcuts import render2 from django.http import HttpResponse3 from .forms import RegisterForm4 from django.views.decorators.http import require_POST5 6 # 验证完成可直接调用save方法“commitFalse”只生成模型而不插入到数据库中7 require_POST8 def register(request):9 form RegisterForm(request.POST)
10 if form.is_valid():
11 user form.save(commitFalse)
12 user.password form.cleaned_data.get(pwd1)
13 user.save()
14 return HttpResponse(success)
15 else:
16 print(form.errors.get_json_data())
17 return HttpResponse(Fail) 转载于:https://www.cnblogs.com/liqiongming/p/10665659.html
