如何使用mongoengine在单个查询中进行排序、限制和过滤

from mongoengine import *

connect('数据库名称', host='数据库地址', port=数据库端口号)

class MyDocument(Document):
    field1 = StringField()
    field2 = IntField()
    # 其他字段...

# 排序
results = MyDocument.objects.order_by('field1')  # 按field1字段升序排序
results = MyDocument.objects.order_by('-field1')  # 按field1字段降序排序

# 限制
results = MyDocument.objects.limit(10)  # 限制返回结果数量为10条

# 过滤
results = MyDocument.objects(field1='value1')  # 筛选field1等于'value1'的文档
results = MyDocument.objects(field2__gt=10)  # 筛选field2大于10的文档
results = MyDocument.objects(field1__contains='value')  # 筛选field1包含'value'的文档

for result in results:
    print(result.field1, result.field2)