Jason Lee

path('friend/request/<uuid:pk>/', api.FriendshipRequestView.as_view(), name='friendshiprequest'),

axios.post('/api/login/', this.form) # 通过表单
axios.post('api/post/', {'body': this.body}) # 通过json

def post(self, request,  *args, **kwargs):
    form = request.POST # 表单
    body = request.data.get('body') # json

# views.py
class SignUpView(FormView):
    template_name = 'core/signup.html'
    form_class = forms.SignUpForm
    success_url = '/login/'

    def form_valid(self, form):
        form.save()
        return super().form_valid(form)

# forms.py
class SignUpForm(UserCreationForm):
    class Meta:
        model = User
        fields = ['username', 'email', 'password1', 'password2']

    username = forms.CharField(widget=forms.TextInput(attrs={
        'placeholder': 'Your username',
        'class': 'w-full py-4 px-6 rounded-xl'
    }))
    email = forms.CharField(widget=forms.EmailInput(attrs={
        'placeholder': 'Your email address',
        'class': 'w-full py-4 px-6 rounded-xl'
    }))
    password1 = forms.CharField(widget=forms.PasswordInput(attrs={
        'placeholder': 'Your password',
        'class': 'w-full py-4 px-6 rounded-xl'
    }))
    password2 = forms.CharField(widget=forms.PasswordInput(attrs={
        'placeholder': 'Repeat password',
        'class': 'w-full py-4 px-6 rounded-xl'
    }))

# forms.py
class LogInForm(AuthenticationForm):
    username = forms.CharField(widget=forms.TextInput(attrs={
        'placeholder': 'Your username',
        'class': 'w-full py-4 px-6 rounded-xl'
    }))
    password = forms.CharField(widget=forms.PasswordInput(attrs={
        'placeholder': 'Your password',
        'class': 'w-full py-4 px-6 rounded-xl'
    }))

# urls.py
path('login/', auth_views.LoginView.as_view(template_name='core/login.html', authentication_form=LogInForm), name='login'),

# settings.py
LOGIN_REDIRECT_URL = '/'

# urls.py
path('logout/', auth_views.LogoutView.as_view(), name='logout')

# settings.py
LOGOUT_REDIRECT_URL = '/'

# models.py

class CustomUserManager(UserManager):
    def _create_user(self, name, email, password, **extra_fields):
        if not email:
            raise ValueError("You have not provided a valid e-mail address")

        email = self.normalize_email(email)
        user = self.model(email=email, name=name, **extra_fields)
        user.set_password(password)
        user.save(using=self._db)

        return user

    def create_user(self, name=None, email=None, password=None, **extra_fields):
        extra_fields.setdefault('is_staff', False)
        extra_fields.setdefault('is_superuser', False)
        return self._create_user(name, email, password, **extra_fields)

    def create_superuser(self, name=None, email=None, password=None, **extra_fields):
        extra_fields.setdefault('is_staff', True)
        extra_fields.setdefault('is_superuser', True)
        return self._create_user(name, email, password, **extra_fields)


class User(AbstractBaseUser, PermissionsMixin):
    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
    email = models.EmailField(unique=True)
    name = models.CharField(max_length=255, blank=True, default='')
    avatar = models.ImageField(upload_to='avatars', blank=True, null=True)

    is_active = models.BooleanField(default=True)
    is_superuser = models.BooleanField(default=False)
    is_staff = models.BooleanField(default=False)

    date_joined = models.DateTimeField(default=timezone.now)
    last_login = models.DateTimeField(blank=True, null=True)

    objects = CustomUserManager()

    USERNAME_FIELD = 'email'
    EMAIL_FIELD = 'email'
    REQUIRED_FIELDS = []

class FibonacciIterator:
    def __init__(self):
        self.a = 0
        self.b = 1

    def __iter__(self):
        return self

    def __next__(self):
        result = self.b
        self.a, self.b = self.b, self.a + self.b
        return result

fib_iter = FibonacciIterator()
for i in range(10):
    print(next(fib_iter))
## 另外一种调用方式
for value in fib_iter:
    print(value)

def fibonacci():
    a, b = 0, 1
    while True:
        yield b
        a, b = b, a + b

f = fibonacci()
for i in range(10):
    print(next(f))
## 也可以：
for value in f:
    print(value)

def printinfo( arg1, *vartuple, **vardict ):
   "打印任何传入的参数"
   print ("输出: ")
   print (arg1)
   print(vartuple)
   print(vardict)

printinfo( 70, 6, a=60, b=50)

out:

输出:
70
(6,)
{'a': 60, 'b': 50}

<div class="flex 主轴对齐 交叉轴对齐 元素间距">
    ...
</div>

<div class="max-w-7xl mx-auto(居中) grid grid-cols-n gap-n">
    <div class="col-span-x">
    ...
    </div>
    <div class="col-span-n-x">
    ...
    </div>
</div>

import io

stream = io.BytesIO(content)
data = JSONParser().parse(stream)

serializer = SnippetSerializer(data=data)
serializer.is_valid()
# True
serializer.validated_data
# OrderedDict([('title', ''), ('code', 'print("hello, world")\n'), ('linenos', False), ('language', 'python'), ('style', 'friendly')])
serializer.save()
# <Snippet: Snippet object>

def get_context_data(self, **kwargs):
    # Call the base implementation first to get a context
    context = super().get_context_data(**kwargs)
    # Add in a QuerySet of all the books
    context["book_list"] = Book.objects.all()
    return context

def get_queryset(self):
    self.publisher = get_object_or_404(Publisher, name=self.kwargs["publisher"])
    return Book.objects.filter(publisher=self.publisher)

class AuthorDetailView(DetailView):
    queryset = Author.objects.all()

    def get_object(self):
        obj = super().get_object()
        # Record the last accessed date
        obj.last_accessed = timezone.now()
        obj.save()
        return obj

class ContactFormView(FormView):
    template_name = "contact.html"
    form_class = ContactForm
    success_url = "/thanks/"

    def form_valid(self, form):
        # This method is called when valid form data has been POSTed.
        # It should return an HttpResponse.
        form.send_email()
        return super().form_valid(form)

from django.contrib.auth.models import User
User.objects.create_user(username='', email='', password='')

from django.http import HttpResponseRedirect
from django.shortcuts import render

from .forms import NameForm


def get_name(request):
    # if this is a POST request we need to process the form data
    if request.method == "POST":
        # create a form instance and populate it with data from the request:
        form = NameForm(request.POST)
        # check whether it's valid:
        if form.is_valid():
            # process the data in form.cleaned_data as required
            # ...
            # redirect to a new URL:
            return HttpResponseRedirect("/thanks/")

    # if a GET (or any other method) we'll create a blank form
    else:
        form = NameForm()

    return render(request, "name.html", {"form": form})

<link href="https://unpkg.com/tailwindcss@^2/dist/tailwind.min.css" rel="stylesheet">

@tailwind base;
@tailwind components;
@tailwind utilities;

<!-- your style -->
@layer components {
  .btn-blue {
    @apply py-2 px-4 bg-blue-500 text-white font-semibold rounded-lg shadow-md hover:bg-blue-700 focus:outline-none focus:ring-2 focus:ring-blue-400 focus:ring-opacity-75;
  }
}

npx tailwindcss-cli build src/tailwind.css -o tailwind.css

<link href="/tailwind.css" rel="stylesheet">

#_*_coding:utf-8_*_
from django.db import models

# Create your models here.

class Colors(models.Model):
    colors=models.CharField(max_length=10) #蓝色
    def __str__(self):
        return self.colors

class Ball(models.Model):
    color=models.OneToOneField("Colors")  #与颜色表为一对一，颜色表为母表
    description=models.CharField(max_length=10) #描述
    def __str__(self):
        return self.description

class Clothes(models.Model):
    color=models.ForeignKey("Colors")   #与颜色表为外键，颜色表为母表
    description=models.CharField(max_length=10) #描述
    def __str__(self):
        return self.description

class Child(models.Model):
    name=models.CharField(max_length=10)   #姓名
    favor=models.ManyToManyField('Colors')    #与颜色表为多对多

## 增加

color_obj=models.Colors.objects.create(colors="黑")  #先在母表中创建颜色，并实例化给颜色表对象
models.Ball.objects.create(color=color_obj,description="黑球")  #更新Ball表，color字段为颜色表对象，添加description字段

## 删除
models.Ball.objects.get(description="灰球").delete()

## 修改
color_obj=models.Colors.objects.get(colors="黑") #.get()等同于.filter().first()
color_obj.colors="灰"
color_obj.save()
models.Ball.objects.filter(description="黑球").update(color=color_obj,description="灰球")

## 查询
### 子表查询母表
models.Ball.objects.get(description="红球").color.colors

### 母表查询子表
models.Colors.objects.get(colors="红").ball.description

## 查

color_obj=models.Colors.objects.get(colors="红")
color_obj.clothes_set.all()
或
models.Clothes.objects.filter(color__colors="红")

## 查

#写法1：
child_obj=models.Child.objects.get(name="小明")  #写法：子表对象.子表多对多字段.过滤条件(all()/filter())
print(child_obj.favor.all())
#写法2，反向从母表入手：
print(models.Colors.objects.filter(child__name="小明")) #母表对象.filter(子表表名小写__子表字段名="过滤条件")