ModelForm的简单使用-注册用modelform编写
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1.前端的ajax代码不用改动
2.modelform，在原来基础上稍作改动
from django import forms
from app01.models import UserInfo
from django.forms import widgets as wid
from django.core.exceptions import ValidationError
import re
class UserModelForm(forms.ModelForm):
r_password = forms.CharField(min_length=5, label="确认密码", widget=wid.PasswordInput(),
error_messages={
"required": "确认密码不能为空！",
"min_length": "确认密码不能少于5位！"
}
)
class Meta:
model=UserInfo
fields=["username","password","r_password","email"]
labels={
"username":"用户名",
"password":"密码",
"email":"邮箱"
}
error_messages={
"username":{"required":"用户名不能为空！",
"min_length":"用户名不能少于5位！"},
"password":{"required":"密码不能为空！",
"min_length": "密码不能少于5位！"},
"email":{"required":"邮箱不能为空！",
"invalid":"邮箱格式错误！"}
}
widgets={"password":wid.PasswordInput()}
def __init__(self,*args,**kwargs):
super().__init__(*args,**kwargs)
for field in self.fields.values():
field.widget.attrs.update({"class":"form-control"})
def clean_username(self):
val = self.cleaned_data.get("username")
user_obj = UserInfo.objects.filter(username=val).first()
if user_obj:
raise ValidationError("该用户已经存在！")
else:
return val
def clean_password(self):
val = self.cleaned_data.get("password")
if val.isdigit():
raise ValidationError("密码不能是纯数字！")
else:
return val
def clean_email(self):
val = self.cleaned_data.get("email")
ret = re.search("\[email protected]$",val)
if ret:
return val
else:
raise ValidationError("邮箱必须是163邮箱！")
def clean(self):
password = self.cleaned_data.get("password")
r_password = self.cleaned_data.get("r_password")
if password and r_password and password != r_password:
self.add_error("r_password",ValidationError("两次密码输入不一致！"))
else:
return self.cleaned_data
3.视图函数，稍微一改
def reg(request):
# 注册功能
if request.method == "POST":
ret = json.loads(request.body)
form = UserModelForm(ret)
res = {"status":200,"err_msg":""}
if form.is_valid():
form.save()
# del ret["r_password"]
# UserInfo.objects.create_user(**ret)
else:
res["status"] = 201
res["err_msg"] = form.errors
return JsonResponse(res)
else:
form = UserModelForm()
return render(request,"reg.html",{"form":form})
modelform的使用
(1) model的知识点：
class UserInfo(AbstractUser):
tel=models.CharField(max_length=32)
gender=models.IntegerField(choices=((1,"男"),(2,"女")),default=1)
yuan=UserInfo.objects.get(pk=1)
yuan.get_gender_display()
(2) modelform使用
model.py:
class Book(models.Model):
nid=models.AutoField(primary_key=True)
title=models.CharField(max_length=32)
price=models.DecimalField(max_digits=8,decimal_places=2) # 999999.99
pub_date=models.DateTimeField() # "2012-12-12"
# comment_count=models.IntegerField(default=100)
# poll_count=models.IntegerField(default=100)
publish=models.ForeignKey(to="Publish",on_delete=models.CASCADE) # 级联删除
authors=models.ManyToManyField(to="Author")
def __str__(self):
return self.title
form.py:
# 构建modelform
class BookModelForm(forms.ModelForm):
class Meta:
model=Book
fields="__all__"
‘‘‘
BookModelForm等同于：
class BookForm(forms.Form):
title=forms.CharField(max_length=32)
price=forms.IntegerField()
pub_date=forms.DateField(widget=widgets.TextInput(attrs={"type":"date"}))
#publish=forms.ChoiceField(choices=[(1,"AAA"),(2,"BBB")])
publish=forms.ModelChoiceField(queryset=Publish.objects.all())
authors=forms.ModelMultipleChoiceField(queryset=Author.objects.all())
‘‘‘
逻辑：
添加书籍：
def add(reqeust):
if GET请求：
form=BookModelForm()
return render(reqeust,{"form":form})
‘‘‘
渲染页面
<form action="" method="post" novalidate>
{% csrf_token %}
{% for field in form %}
<div class="form-group">
<label for="title">{{ field.label }}</label>
{{ field }}
<span>{{ field.errors.0 }}</span>
</div>
{% endfor %}
<input type="submit" value="提交" class="btn btn-default pull-right">
</form>
‘‘‘
else POST请求：
form=BookModelForm(request.POST)
if form.is_valid():
form.save() # Book.objects.create(clean_data)
return redirect("/")
else:
return render(reqeust,{"form":form})
编辑书籍：
def edit(request,id):
edit_obj=Book.objects.get(pk=id)
if GET请求：
form=BookModelForm(instance=edit_obj)
return render(reqeust,{"form":form})
‘‘‘
渲染页面同添加页面
‘‘‘
else POST请求：
form=BookModelForm(request.POST,instance=edit_obj)
if form.is_valid():
form.save() # edit_obj.update(clean_data)
return redirect("/")
else:
return render(reqeust,{"form":form})
(1) model的知识点：
class UserInfo(AbstractUser):
tel=models.CharField(max_length=32)
gender=models.IntegerField(choices=((1,"男"),(2,"女")),default=1)
yuan=UserInfo.objects.get(pk=1)
yuan.get_gender_display()
(2) modelform使用
model.py:
class Book(models.Model):
nid=models.AutoField(primary_key=True)
title=models.CharField(max_length=32)
price=models.DecimalField(max_digits=8,decimal_places=2) # 999999.99
pub_date=models.DateTimeField() # "2012-12-12"
# comment_count=models.IntegerField(default=100)
# poll_count=models.IntegerField(default=100)
publish=models.ForeignKey(to="Publish",on_delete=models.CASCADE) # 级联删除
authors=models.ManyToManyField(to="Author")
def __str__(self):
return self.title
form.py:
# 构建modelform
class BookModelForm(forms.ModelForm):
class Meta:
model=Book
fields="__all__"
‘‘‘
BookModelForm等同于：
class BookForm(forms.Form):
title=forms.CharField(max_length=32)
price=forms.IntegerField()
pub_date=forms.DateField(widget=widgets.TextInput(attrs={"type":"date"}))
#publish=forms.ChoiceField(choices=[(1,"AAA"),(2,"BBB")])
publish=forms.ModelChoiceField(queryset=Publish.objects.all())
authors=forms.ModelMultipleChoiceField(queryset=Author.objects.all())
‘‘‘
逻辑：
添加书籍：
def add(reqeust):
if GET请求：
form=BookModelForm()
return render(reqeust,{"form":form})
‘‘‘
渲染页面
<form action="" method="post" novalidate>
{% csrf_token %}
{% for field in form %}
<div class="form-group">
<label for="title">{{ field.label }}</label>
{{ field }}
<span>{{ field.errors.0 }}</span>
</div>
{% endfor %}
<input type="submit" value="提交" class="btn btn-default pull-right">
</form>
‘‘‘
else POST请求：
form=BookModelForm(request.POST)
if form.is_valid():
form.save() # Book.objects.create(clean_data)
return redirect("/")
else:
return render(reqeust,{"form":form})
编辑书籍：
def edit(request,id):
edit_obj=Book.objects.get(pk=id)
if GET请求：
form=BookModelForm(instance=edit_obj)
return render(reqeust,{"form":form})
‘‘‘
渲染页面同添加页面
‘‘‘
else POST请求：
form=BookModelForm(request.POST,instance=edit_obj)
if form.is_valid():
form.save() # edit_obj.update(clean_data)
return redirect("/")
else:
return render(reqeust,{"form":form})
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