PyMongo基本使用

引用PyMongo

>>> import pymongo

创建连接Connection

>>> import pymongo


>>> conn = pymongo.Connection('localhost',27017)

或

>>> from pymongo import Connection


>>> conn = Connection('localhost',27017)

创建Connection时，指定host及port参数

>>> import pymongo

>>> conn = pymongo.Connection(host='127.0.0.1',port=27017)

连接数据库

>>> db = conn.ChatRoom

或

>>> db = conn['ChatRoom']

连接聚集

>>> account = db.Account

或

>>> account = db["Account"]

查看全部聚集名称

>>> db.collection_names()

查看聚集的一条记录

>>> db.Account.find_one()

>>> db.Account.find_one({"UserName":"keyword"})

查看聚集的字段

>>> db.Account.find_one({},{"UserName":1,"Email":1})
{u'UserName': u'libing', u'_id': ObjectId('4ded95c3b7780a774a099b7c'), u'Email': u'libing@35.cn'}

>>> db.Account.find_one({},{"UserName":1,"Email":1,"_id":0})
{u'UserName': u'libing', u'Email': u'libing@35.cn'}

查看聚集的多条记录

>>> for item in db.Account.find():

        item

>>> for item in db.Account.find({"UserName":"libing"}):
        item["UserName"]

查看聚集的记录统计

>>> db.Account.find().count()

>>> db.Account.find({"UserName":"keyword"}).count()

聚集查询结果排序

>>> db.Account.find().sort("UserName")  --默认为升序
>>> db.Account.find().sort("UserName",pymongo.ASCENDING)   --升序
>>> db.Account.find().sort("UserName",pymongo.DESCENDING)  --降序

聚集查询结果多列排序

>>> db.Account.find().sort([("UserName",pymongo.ASCENDING),("Email",pymongo.DESCENDING)])

添加记录

>>> db.Account.insert({"AccountID":21,"UserName":"libing"})

修改记录

>>> db.Account.update({"UserName":"libing"},{"$set":{"Email":"libing@126.com","Password":"123"}})

删除记录

>>> db.Account.remove()   -- 全部删除

>>> db.Test.remove({"UserName":"keyword"})