Flask-Mongoengine自定义排序方式比较器

from mongoengine import Document, StringField
from flask_mongoengine import MongoEngine

app = Flask(__name__)
app.config['MONGODB_SETTINGS'] = {
    'db': 'your_database',
    'host': 'your_host',
    'port': 'your_port',
    'username': 'your_username',
    'password': 'your_password'
}

db = MongoEngine(app)

class CustomComparator:
    def __init__(self, value):
        self.value = value

    def __lt__(self, other):
        # 自定义排序规则，这里以字符串长度为例
        return len(self.value) < len(other.value)

class MyDocument(Document):
    name = StringField()
    custom_field = StringField(comparator=CustomComparator)

# 查询并按自定义排序方式排序
results = MyDocument.objects.order_by('custom_field')

for result in results:
    print(result.name)