連接

#　mongodb與python的交互
# 　pip3 intsall pymongo
import pymongo
from bson.objectid import ObjectId

#創(chuàng)建mongo客戶端鏈接
mongoConn = pymongo.MongoClient('localhost',27017)
# 第二種
# mongoConn = pymongo.MongoClient('mongodb://localhost:27017/')

#有賬號和密碼的連接
#mongoConn = pymongo.MongoClient('mongodb://user:paw@localhost:27017/')

#操作數(shù)據(jù)庫下的集合
#獲取要操作的數(shù)據(jù)庫
# use_db = mongoConn.數(shù)據(jù)庫名稱
use_db = mongoConn.mongotest
# use_db = mongoConn['mongotest']

#獲取數(shù)據(jù)庫下要操作的集合
use_col = use_db.class1804
# use_col = use_db['class1804']

文檔操作

增

def add_data():
    document = {
        # '_id':'2e761r27e1' 指定id
        'name':'liyong',
        'age':20,
        'gender':'男',
        'class':'1804',
    }

    document1 = {
        'name':'lihua',
        'age':22,
        'gender':'男',
        'class':'1804',
    }
    #插入單條(result直接返回一個ｉｄ串)
    # result = use_col.insert(document)
    # use_col.insert_one(document)
    #插入多條(result直接返回list(Object(...),Object(...))
    result = use_col.insert([document,document1])
    # use_col.insert_many([document,document1])
    #也可以使用save
    # use_col.save(document)
    print(result)

刪

def delete_data():
    #刪除一條
    #result = use_col.delete_one({})
    # result = use_col.remove({'name':'liyong'},multi=False)
    # print(result)
    #刪除多條
    # result = use_col.delete_many({})
    #　multi=False刪除一條钩蚊，multi=True刪除多條，
    result = use_col.remove({'name':'liyong'})
    print(result)

改

def update_data():
    #默認(rèn)情況下只修改一條
    # result = use_col.update({'name':'liyong'},{'$set':{'age':23}})
    # print(result)
    #全文檔更新只修改一條
    # result = use_col.update({'name':'liyong'},{'name':'lisi','age':23})
    # print(result)
    #更新超照到的全部結(jié)果修改多條
    # result = use_col.update_many({'name':'liyong'},{'$set':{'age':23}})
    # print(result)
    #　使用save做更新操作,全文檔更新
    #注意：name 'ObjectId' is not defined,導(dǎo)入Bson模塊下的objectid
    result = use_col.save(
        {'_id':ObjectId("5b836b9711575e79be9af0c7"),
        'name':'wangwu'}
    )

查

def find_data():
    #　使用find查詢钻注，會返回一個ｃｕｒｓｏｒ?qū)ο螅?    #<pymongo.cursor.Cursor object at 0x7fa13d988e10>
    # 我們要拿到數(shù)據(jù)会宪，需要遍歷
    # result = use_col.find({'name':'liyong'})
    # print(result)
    # print([i for i in result])

    # result = use_col.find_one_and_delete()
    # result = use_col.find_one_and_replace()
    # result = use_col.find_one_and_update()

    #find_one查詢時撬陵，直接返回一個字典
    # result = use_col.find_one({'name':'liyong'}) 
    # print(result)
    # print(type(result))

    #跳過和限制查詢s
    # result = use_col.find({}).limit(4).skip(2).sort([("age",1),("name",1)])
    result = use_col.find({}).limit(4).skip(2).sort("age",1).sort("name",1)
    print([i for i in result])

    # for dict in result:
    # print(dict)

if __name__ == '__main__':
    # add_data()
    # update_data()
    # find_data()
    # delete_data()