使用 python 从 MongoDB atlas 下载 json 文件答案

【问题标题】：Download json file from MongoDB atlas with python使用 python 从 MongoDB atlas 下载 json 文件
【发布时间】：2020-09-13 13:45:34
【问题描述】：

我想下载整个集合并将其放入一个 json 文件中。我试过了（见下文），但它不起作用。

import json
from pymongo import MongoClient
import pymongo
from pathlib import Path

myclient = MongoClient("mongodb+srv://<DbName>:<DbPass>@<DbName>.a3b2ai.mongodb.net/<DbName>?retryWrites=true&w=majority")

db = myclient["PlayerPrices"]

Collection = db["Playstation"]

payload = db.inventory.find( {} ) #I think this command is the problem
with open(str(Path(__file__).parents[1]) + '\Main\playstation_1.json', 'r+') as file:
                json.dump(payload, file, indent=4)

【问题讨论】：

标签： python json mongodb

【解决方案1】：

问题是您需要将 Pymongo 光标转换为支持 json 格式。

# Python Program for 
# demonstrating the  
# PyMongo Cursor to JSON 


# Importing required modules 
from pymongo import MongoClient 
from bson.json_util import dumps, loads 


# Connecting to MongoDB server 
# client = MongoClient('host_name', 
# 'port_number') 
client = MongoClient('localhost', 27017) 

# Connecting to the database named 
# GFG 
mydatabase = client.GFG 

# Accessing the collection named 
# gfg_collection 
mycollection = mydatabase.College 

# Now creating a Cursor instance 
# using find() function 
cursor = mycollection.find() 

# Converting cursor to the list  
# of dictionaries 
list_cur = list(cursor) 

# Converting to the JSON 
json_data = dumps(list_cur, indent = 2)  

# Writing data to file data.json 
with open('data.json', 'w') as file: 
  file.write(json_data)

资源取自：https://www.geeksforgeeks.org/convert-pymongo-cursor-to-json/

【讨论】：