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我正在學習使用python/mongo/bootstrap製作web應用程序的在線課程。使用python訪問mongodb數據庫
我使用默認設置安裝MongoDB的
我在PowerShell中運行的mongod從安裝目錄
C:\Program Files\MongoDB\Server\3.2\bin>mongod
2016-02-27T23:31:14.684-0500 I CONTROL [initandlisten] MongoDB starting : pid=2456 port=27017 dbpath=C:\data\db\ 64-bit host=DESKTOP-8LMCN7R
2016-02-27T23:31:14.686-0500 I CONTROL [initandlisten] targetMinOS: Windows 7/Windows Server 2008 R2
2016-02-27T23:31:14.687-0500 I CONTROL [initandlisten] db version v3.2.3
2016-02-27T23:31:14.689-0500 I CONTROL [initandlisten] git version: b326ba837cf6f49d65c2f85e1b70f6f31ece7937
2016-02-27T23:31:14.690-0500 I CONTROL [initandlisten] OpenSSL version: OpenSSL 1.0.1p-fips 9 Jul 2015
2016-02-27T23:31:14.692-0500 I CONTROL [initandlisten] allocator: tcmalloc
2016-02-27T23:31:14.693-0500 I CONTROL [initandlisten] modules: none
2016-02-27T23:31:14.704-0500 I CONTROL [initandlisten] build environment:
2016-02-27T23:31:14.706-0500 I CONTROL [initandlisten] distmod: 2008plus-ssl
2016-02-27T23:31:14.707-0500 I CONTROL [initandlisten] distarch: x86_64
2016-02-27T23:31:14.708-0500 I CONTROL [initandlisten] target_arch: x86_64
2016-02-27T23:31:14.709-0500 I CONTROL [initandlisten] options: {}
2016-02-27T23:31:14.712-0500 I - [initandlisten] Detected data files in C:\data\db\ created by the 'wiredTiger' storage engine, so setting the active storage engine to 'wiredTiger'.
2016-02-27T23:31:14.715-0500 W - [initandlisten] Detected unclean shutdown - C:\data\db\mongod.lock is not empty.
2016-02-27T23:31:14.718-0500 W STORAGE [initandlisten] Recovering data from the last clean checkpoint.
2016-02-27T23:31:14.720-0500 I STORAGE [initandlisten] wiredtiger_open config: create,cache_size=4G,session_max=20000,eviction=(threads_max=4),config_base=false,statistics=(fast),log=(enabled=true,archive=true,path=journal,compressor=snappy),file_manager=(close_idle_time=100000),checkpoint=(wait=60,log_size=2GB),statistics_log=(wait=0),
2016-02-27T23:31:14.954-0500 I NETWORK [HostnameCanonicalizationWorker] Starting hostname canonicalization worker
2016-02-27T23:31:14.954-0500 I FTDC [initandlisten] Initializing full-time diagnostic data capture with directory 'C:/data/db/diagnostic.data'
2016-02-27T23:31:14.962-0500 I NETWORK [initandlisten] waiting for connections on port 27017
2016-02-27T23:31:15.004-0500 I FTDC [ftdc] Unclean full-time diagnostic data capture shutdown detected, found interim file, some metrics may have been lost. OK
2016-02-27T23:32:10.255-0500 I NETWORK [initandlisten] connection accepted from 127.0.0.1:50834 #1 (1 connection now open)
我從不同的PowerShell中運行蒙戈安裝目錄
C:\Program Files\MongoDB\Server\3.2\bin>mongo
MongoDB shell version: 3.2.3
connecting to: test
我確認自己在我的分數是一些值
> show dbs
fullstack 0.000GB
local 0.000GB
> use fullstack
switched to db fullstack
> show collections
students
> db.students.find({})
{ "_id" : ObjectId("56d1b951d14d4af940b77a14"), "name" : "Jose", "mark" : "99" }
{ "_id" : ObjectId("56d211e8d14d4af940b77a16"), "name" : "Jose", "Mark" : 99 }
{ "_id" : ObjectId("56d26bedc83f1574076c732b"), "name" : "Jose", "mark" : 99 }
{ "_id" : ObjectId("56d26c0fc83f1574076c732c"), "name" : "Kris", "mark" : 69 }
{ "_id" : ObjectId("56d271b1c83f1574076c732d"), "name" : "Kelly", "Grade" : 99 }
我pyCharm運行此代碼：
import pymongo
uri="mongodb://127.0.0.1:27017"
client = pymongo.MongoClient(uri)
database = client['fullstack']
collection = database['students']
students = collection.find({})
for student in students:
print(students)
但解釋沒有返回。沒有錯誤。它只是不返回任何東西。控制檯甚至不會返回遊標轉儲。我究竟做錯了什麼？
你可以保留[閱讀教程]（http://api.mongodb.org/python/current/tutorial.html）（如果你搜索的話應該很容易找到）。 '.find（）'的結果是一個「光標」。你需要迭代它，而不是隻是轉儲它。 –
可能的重複[爲什麼當我試圖通過pymongo查詢我的mongodb數據庫時，得到一個pymongo.cursor.Cursor？]（http://stackoverflow.com/questions/17489789/why-do-i-get-a-pymongo -cursor-cursor-when-trying-to-query-my-mongodb-db-via-pymo） –
感謝您的鏈接，生病檢查出來。糾正我，如果我錯了，但不應該打印光標的控制檯？ –