Delete Document – Баримт бичиг устгах #
To delete one document, we use the delete_one() method.
Нэг баримт бичиг устгахдаа, бид delete_one() арга ашиглана.
The first parameter of the delete_one() method is a query object defining which document to delete.
Note: If the query finds more than one document, only the first occurrence is deleted.
Example – Жишээ #
Delete the document with the address “Mountain 21”:
Хаяг баримт бичгээс “Mountain 21”-ийг устга:
import pymongo
myclient = pymongo.MongoClient("mongodb://localhost:27017/")
mydb = myclient["mydatabase"]
mycol = mydb["customers"]
myquery = { "address": "Mountain 21" }
mycol.delete_one(myquery)
Delete Many Documents – Олон баримт бичгийг устгах #
To delete more than one document, use the delete_many() method.
Нэгээс их баримт бичгийг устгах даа, delete_many() аргийг ашиглана.
The first parameter of the delete_many() method is a query object defining which documents to delete.
delete_many() аргын эхний параметр нь аль баримт бичгийг устгахыг тодорхойлох асуулгын объект юм.Example – Жишээ #
Delete all documents were the address starts with the letter S:
Баримт бичгээс бүх S үсгээр эхэлсэн хаягуудыг устгах:
import pymongo
myclient = pymongo.MongoClient("mongodb://localhost:27017/")
mydb = myclient["mydatabase"]
mycol = mydb["customers"]
myquery = { "address": {"$regex": "^S"} }
x = mycol.delete_many(myquery)
print(x.deleted_count, " documents deleted.")
Delete All Documents in a Collection – Цуглуулгын бүх баримтыг устгах #
To delete all documents in a collection, pass an empty query object to the delete_many() method:
Цуглуулгын бүх баримтыг устгах даа, хоосон болгох асуулгын объект delete_many() аргыг ашиглана:
Example – Жишээ #
Delete all documents in the “customers” collection:
“customers” цуглуулгын бүх баримтыг устгах:
import pymongo
myclient = pymongo.MongoClient("mongodb://localhost:27017/")
mydb = myclient["mydatabase"]
mycol = mydb["customers"]
x = mycol.delete_many({})
print(x.deleted_count, " documents deleted.")
