确定Python中是否存在MongoDB中的集合

我想知道MongoDB中是否存在特定名称的集合。如何在Python中以编程方式实现这一点。在搜索相同的内容时，我从MongoDB shell了解了如何做到这一点，但在Python中没有任何用处

您可以使用该方法检索并检查@Alex给定的集合是否存在，如下所示：

方法1:

import pymongo

connection = pymongo.MongoClient('localhost', 27017)  # Connect to mongodb

db = connection['test_db']
list_of_collections = db.list_collection_names()  # Return a list of collections in 'test_db'
print("posts" in db.list_collection_names())  # Check if collection "posts" exists in db (test_db)

import pymongo
connection = pymongo.MongoClient('localhost', 27017)  # Connect to mongodb

db = connection['test_db']

try:
    db.validate_collection("random_collection_name")  # Try to validate a collection
except pymongo.errors.OperationFailure:  # If the collection doesn't exist
    print("This collection doesn't exist")

或者，您可以使用

validate_collection（）

（）验证集合。如果集合不存在，则返回错误（

pymongo.errors.OperationFailure

）。您还可以捕获该异常并执行任何您想要的操作

方法2:

import pymongo

connection = pymongo.MongoClient('localhost', 27017)  # Connect to mongodb

db = connection['test_db']
list_of_collections = db.list_collection_names()  # Return a list of collections in 'test_db'
print("posts" in db.list_collection_names())  # Check if collection "posts" exists in db (test_db)

import pymongo
connection = pymongo.MongoClient('localhost', 27017)  # Connect to mongodb

db = connection['test_db']

try:
    db.validate_collection("random_collection_name")  # Try to validate a collection
except pymongo.errors.OperationFailure:  # If the collection doesn't exist
    print("This collection doesn't exist")

---

可能是@Alex的副本：谢谢。。。这就解决了我的问题：）@Alex:你能把这个作为答案贴出来，这样我就可以接受这个作为最终答案了吗？