create_user() 接受 2 到 4 个位置参数，但给出了 6 个答案

【问题标题】：create_user() takes from 2 to 4 positional arguments but 6 were givencreate_user() 接受 2 到 4 个位置参数，但给出了 6 个
【发布时间】：2018-03-20 13:09:37
【问题描述】：

填写注册表并点击提交后弹出此错误 “create_user() 接受 2 到 4 个位置参数，但给出了 6 个” 而且它不使用模板中的表单内的验证

不检查用户名或电子邮件是否已经在数据库中，甚至不检查密码是否匹配

forms.py

from django import forms
from django.contrib.auth.forms import UserCreationForm
from django.contrib.auth.models import User
from django.forms.widgets import PasswordInput, TextInput
from django.core.exceptions import ValidationError



class CustomUserCreationForm(forms.Form):
    username = forms.CharField(widget=TextInput(attrs={'class':'validate','id': 'icon_prefix', 'type': 'text'}), min_length=4, max_length=150)
    email = forms.EmailField(widget=TextInput(attrs={'class':'validate','id': 'icon_prefix', 'type': 'text'}))
    first_name = forms.CharField(widget=TextInput(attrs={'class':'validate','id': 'icon_prefix', 'type': 'text'}), min_length=2, max_length=150)
    last_name = forms.CharField(widget=TextInput(attrs={'class':'validate','id': 'icon_prefix', 'type': 'text'}), min_length=2, max_length=150)
    password1 = forms.CharField(widget=PasswordInput(attrs={'class':'validate','id': 'icon_prefix', 'type': 'password'}))
    password2 = forms.CharField(widget=PasswordInput(attrs={'class':'validate','id': 'icon_prefix', 'type': 'password'}))



def clean_username(self):
    username = self.cleaned_data['username'].lower()
    r = User.objects.filter(username=username)
    if r.count():
        raise  ValidationError("Username already exists")
    return username

def clean_first_name(self):
    first_name = self.cleaned_data['first_name']

    return first_name

def clean_last_name(self):
    last_name = self.cleaned_data['last_name']

    return last_name

def clean_email(self):
    email = self.cleaned_data['email'].lower()
    r = User.objects.filter(email=email)
    if r.count():
        raise  ValidationError("Email already exists")
    return email

def clean_password2(self):
    password1 = self.cleaned_data.get('password1')
    password2 = self.cleaned_data.get('password2')

    if password1 and password2 and password1 != password2:
        raise ValidationError("Password don't match")

    return password2

def save(self, commit=True):
    user = User.objects.create_user(
        self.cleaned_data['username'],
        self.cleaned_data['first_name'],
        self.cleaned_data['last_name'],
        self.cleaned_data['email'],
        self.cleaned_data['password1']
    )
    return user

【问题讨论】：

你不应该使用positional arguments

标签： python django

【解决方案1】：

create_user 只需要用户名作为位置参数。所有其他数据都应作为关键字参数传递。

user = User.objects.create_user(
    self.cleaned_data['username'],
    first_name=self.cleaned_data['first_name'],
    last_name=self.cleaned_data['last_name'],
    email=self.cleaned_data['email'],
    password=self.cleaned_data['password1']
)

【讨论】：