from pymongo import MongoClient

# 连接到MongoDB
client = MongoClient('mongodb://localhost:27017/')

# 选择数据库
db = client['mydatabase']

# 选择集合（类似于SQL中的表）
collection = db['mycollection']

# 插入文档
collection.insert_one({'name': 'Alice', 'age': 25, 'address': '123 Maple Lane'})

# 查询文档
alice = collection.find_one({'name': 'Alice'})
print(alice)

# 更新文档
collection.update_one({'name': 'Alice'}, {'$set': {'age': 30}})

# 删除文档
collection.delete_one({'name': 'Alice'})

# 关闭连接
client.close()

# 导入Django内置的User模型
from django.contrib.auth.models import User
# 导入SimpleUI的ModelAdmin类
from simpleui.admin import ModelAdmin, site

# 定义User模型在SimpleUI中的配置
class UserConfig(ModelAdmin):
    # 定义在User列表页显示的字段
    list_display = ['username', 'email', 'first_name', 'last_name']
    # 定义在User详情页显示的字段
    fields = ['username', 'password', 'email', ('first_name', 'last_name'), 'is_active', 'is_staff']
    # 定义搜索框过滤字段
    search_fields = ['username', 'first_name', 'last_name', 'email']
    # 定义不显示在界面上的字段
    exclude = ['user_permissions', 'groups']
    # 定义User模型的编辑页面选项卡
    tabs = [
        {'title': 'Profile', 'fields': ['username', 'password']},
        {'title': 'Personal', 'fields': ['email', 'first_name', 'last_name']},
        {'title': 'Permissions', 'fields': ['is_active', 'is_staff', 'user_permissions', 'groups'], 'classes': ['collapse']}
    ]

# 将User模型注册到SimpleUI admin站点
site.register(User, UserConfig)

# 创建一个网络，以便容器之间可以通信
docker network create mongo-net

# 启动3个MongoDB实例，分别作为主节点、副本节点和仲裁节点
docker run --name mongo-primary -d --net mongo-net mongo mongod --replSet rs0 --bind_ip 0.0.0.0
docker run --name mongo-secondary1 -d --net mongo-net mongo mongod --replSet rs0 --bind_ip 0.0.0.0
docker run --name mongo-arbiter -d --net mongo-net mongo mongod --replSet rs0 --bind_ip 0.0.0.0 --arbiter

# 进入主节点的CLI
docker exec -it mongo-primary mongo

# 在Mongo Shell中初始化副本集
rs.initiate(
  {
    _id: "rs0",
    members: [
      { _id: 0, host: "mongo-primary:27017" },
      { _id: 1, host: "mongo-secondary1:27017" },
      { _id: 2, host: "mongo-arbiter:27017", arbiterOnly: true }
    ]
  }
)

originalSlice := []int{1, 2, 3}
newSlice := make([]int, len(originalSlice))
copy(newSlice, originalSlice)

originalSlice := []int{1, 2, 3}
newSlice := originalSlice[:]

originalSlice := []int{1, 2, 3}
newSlice := append(originalSlice, 4)

originalSlice := []int{1, 2, 3}
anotherSlice := []int{4, 5}
newSlice := append(originalSlice, anotherSlice...)

// 创建单字段索引
db.collection.createIndex({ field: 1 }) // 升序索引
db.collection.createIndex({ field: -1 }) // 降序索引

// 创建唯一索引
db.collection.createIndex({ field: 1 }, { unique: true })

// 创建复合索引
db.collection.createIndex({ field1: 1, field2: -1 })

// 创建全文索引
db.collection.createIndex({ field: "text" })

// 创建地理空间索引
db.collection.createIndex({ field: "2dsphere" })

# 在你的Django应用目录/management/commands/run_script.py
from django.core.management.base import BaseCommand
import subprocess

class Command(BaseCommand):
    help = 'Runs a Python script'

    def add_arguments(self, parser):
        parser.add_argument('script_path', type=str, help='Path to the Python script')

    def handle(self, *args, **kwargs):
        script_path = kwargs['script_path']
        subprocess.run(['python', script_path])

python manage.py run_script /path/to/your/script.py

db.students.aggregate([
  {
    $project: {
      name: 1,
      score: "$grade", // 重命名字段
      _id: 0 // 不包含_id字段
    }
  }
]);

from django.utils.translation import gettext_lazy as _

class MyModel(models.Model):
    title = models.CharField(max_length=200, verbose_name=_("标题"))
    description = models.TextField(verbose_name=_("描述"))

    def __str__(self):
        return self.title

class MyForm(forms.ModelForm):
    class Meta:
        model = MyModel
        fields = ['title', 'description']
        labels = {
            'title': _('标题'),
            'description': _('描述'),
        }

pip install django-db-connection-pool

MIDDLEWARE = [
    # ...
    'db_connection_pool.middleware.ConnectionPoolMiddleware',
    # ...
]

# settings.py

DATABASE_POOL_ARGS = {
    'max_connections': 10,  # 最大连接数
    'max_connections_per_database': 5,  # 每个数据库的最大连接数
}

# projectname/__init__.py

from db_connection_pool import configure_pool

configure_pool()