Python 使用 Pymongo 获取集合的所有文档
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Get all documents of a collection using Pymongo
提问by MAYA
I want to write a function to return all the documents contained in mycollectionin mongodb
我想写一个函数来返回mycollectionmongodb中包含的所有文档
from pymongo import MongoClient
if __name__ == '__main__':
client = MongoClient("localhost", 27017, maxPoolSize=50)
db=client.mydatabase
collection=db['mycollection']
cursor = collection.find({})
for document in cursor:
print(document)
However, the function returns: Process finished with exit code 0
但是，该函数返回： Process finished with exit code 0
回答by notionquest
Here is the sample code which works fine when you run from command prompt.
这是从命令提示符运行时可以正常工作的示例代码。
from pymongo import MongoClient
if __name__ == '__main__':
client = MongoClient("localhost", 27017, maxPoolSize=50)
db = client.localhost
collection = db['chain']
cursor = collection.find({})
for document in cursor:
print(document)
Please check the collection name.
请检查集合名称。
回答by Robert Nagtegaal
pymongo creates a cursor. Hence you'll get the object 'under' the cursor. To get all objects in general try:
pymongo 创建一个游标。因此，您将获得光标“下方”的对象。要获取所有对象，请尝试：
list(db.collection.find({}))
This will force the cursor to iterate over each object and put it in a list()
这将强制光标遍历每个对象并将其放入 list()
Have fun...
玩得开心...
回答by Isuru Maldeniya
I think this will work fine in your program.
我认为这将在您的程序中正常工作。
cursor = db.mycollection # choosing the collection you need
for document in cursor.find():
print (document)
