bson

Internally, what are the differences between these two fields? What kind of schema do these fields map to in mongo? Also, how should documents with relations be added to these fields? For example, if I use from mongoengine import * class User(Document): name = StringField() class Comment(EmbeddedDocument): text = StringField() tag = StringField() class Post(Document): title = StringField() author = ReferenceField(User) comments = ListField(EmbeddedDocumentField(Comment)) and call >>> some_author = User.objects.get(name="ExampleUserName") >>> post = Post.objects.get(author=some_author) >>> post

I'm having trouble getting a simple Hello World app to work using Flask, MongoDB, and Python. The app is bombing when trying to import from the bson module. All modules were installed successfully via pip and I'm running in a virtualenv , so I'm not sure why I'm getting the error: ImportError: cannot import name BSON Here is my sample app code: import os from flask import Flask from flask import g from flask import jsonify from flask import json from flask import request from flask import url_for from flask import redirect from flask import render_template from flask import make_response

MongoDB基础之BSON数据类型 本博客参考MongoDB4.2官方文档。 MongoDB的文档类似于JSON，JSON是一种简单的额表示数据的方式，仅包含6种数据类型，分别是：null、布尔、数字、字符串、数组和对象。 虽然这些类型的表现已经足够强大，但是对于绝大多数应用来说还需要另外一些不可或缺的类型。例如，日期类型、数字类型（只有一种，没法区分整型和浮点）、正则表达式等。 MongoDB在保留JSON基本的键值对特性的基础上，添加了其他一些数据类型。在不同的编程语言下这些类型的表示有些差异。 下面列出MongoDB通常支持的一些类型，同时说明了在shell中这些类型的表示方法。 每种BSON类型都具有整数和字符串标识符，如下表所示： 类型 整数 别名 备注 说明 Double 1 double shell中的数字类型 64位浮点数 String 2 string 字符串类型 Object 3 object 对象类型 Array 4 array 数组类型 Binary data 5 binData shell中不可用 二进制数据类型 Undefined 6 undefined 已过时 未定义类型 ObjectId 7 objectId 对象id类型 Boolean 8 bool 布尔类型 Date 9 date 日期类型 Null 10 null

I've spent MANY hours looking for the answer... This is very easy in PHP but I just can't put it together in C#(I'm new to C# and mongo...) I'm trying to iterate through all levels of a stored document. The document looks like this: { "_id" : ObjectId("51f90101853bd88971ecdf27"), "fields" : [{ "ID" : ObjectId("51fd09498b080ee40c00514e"), "NAME" : "ID", "TYPE" : "Text" }, { "ID" : ObjectId("51fd09a68b080ee40c0064db"), "NAME" : "Title", "TYPE" : "Text" }, { "ID" : ObjectId("51fd09b28b080ee40c004d31"), "NAME" : "Start Date", "TYPE" : "Date" }, { "ID" : ObjectId("51fd09c28b080ee40c007f2e"), "NAME"

I am breaking my mind up thinking about a good document structure for handling a message app. I basically need three (or four) types of objects: The user (username, email, password, etc.) The contacts list (containing different contacts or contacts groups) The conversation (a conversation is a collection of messages between some persons) The message (contains the message body, some timestamp and the creator.) My idea was to embed the contacts into the user document and to embed the messages in a conversation document: 1. User { username: 'dev.puS', usernameCanonical: 'dev.pus', // used for

Does anyone have any information on the performance characteristics of Protocol Buffers versus BSON (binary JSON) or versus JSON in general? Wire size Serialization speed Deserialization speed These seem like good binary protocols for use over HTTP. I'm just wondering which would be better in the long run for a C# environment. Here's some info that I was reading on BSON and Protocol Buffers . Michael Greene Thrift is another Protocol Buffers-like alternative as well. There are good benchmarks from the Java community on serialization/deserialization and wire size of these technologies: https:/