mongodb

问题 Let's imagine I have the following collection of books (Edited out the ID field for compactness): { "author" : "Steve Jones", "title" : "Fun Stuff", "edition" : "2010" } { "author" : "Steve Jones", "title" : "Fun Stuff", "edition" : "2011" } { "author" : "Steve Jones", "title" : "Boring Stuff", "edition" : "2010" } { "author" : "Ben Johnson", "title" : "Other Stuff", "edition" : "2010" } What should I do I want to find only the latest edition of each book? In other words: I want to get a

问题 Let's imagine I have the following collection of books (Edited out the ID field for compactness): { "author" : "Steve Jones", "title" : "Fun Stuff", "edition" : "2010" } { "author" : "Steve Jones", "title" : "Fun Stuff", "edition" : "2011" } { "author" : "Steve Jones", "title" : "Boring Stuff", "edition" : "2010" } { "author" : "Ben Johnson", "title" : "Other Stuff", "edition" : "2010" } What should I do I want to find only the latest edition of each book? In other words: I want to get a

问题 I am using Spring Boot and Spring Data MongoDB to interface with an underlying sharded MongoDB cluster. My Spring Boot Application access the cluster via a mongos router. Using Spring Data MongoDB, you can specify the collection an object is persisted to via @Document(collection = "nameOfCollection") , or it defaults to the class name (first letter lowercase). These collections do not need to exist before-hand; they can be created at runtime. To shard a collection in MongoDB, you need to 1 -

问题 I am using Spring Boot and Spring Data MongoDB to interface with an underlying sharded MongoDB cluster. My Spring Boot Application access the cluster via a mongos router. Using Spring Data MongoDB, you can specify the collection an object is persisted to via @Document(collection = "nameOfCollection") , or it defaults to the class name (first letter lowercase). These collections do not need to exist before-hand; they can be created at runtime. To shard a collection in MongoDB, you need to 1 -

问题 I am trying to run nodemon index.js in my terminal but I am getting the following error which I have absolutely no idea what it means as for me is very unclear. Can please anyone explain to me how to solve this? index.js const express = require('express'); const morgan = require('morgan'); const bodyParser = require('body-parser'); const mongoose = require('mongoose'); var app = express(); var router = require('./services/router'); mongoose.connect('mongodb://localhost:apiAuth'); app.use

问题 I want to use fluent-ffmpeg to create a video of last n images of a directory, or database entries. Which is the correct syntax? These are my tries: Mimic shell command ffmpeg() .addInput('ls *png | tail -n 17') .inputOptions("-pattern_type glob") .output("output.mp4").run() but it does not accept shell commands; space - separated paths ffmpeg() .addInput('a*.png b*.png ') .inputOptions("-pattern_type glob") .output("output.mp4").run() but it does not accept list of files separated by spaces;

问题 I just installed mongoDB in my windows machine MongoDB version : Windows 64-bit 2008 R2+ release 3.0.4 OS Version : Microsoft Windows 7 Ultimate 64-bit Installation Directory: "C:\Program Files\MongoDB" instead of creating the database in default C:\data\db\ , I created a directory in the installation directory, i.e. C:\Program Files\MongoDB\data\db . Now I can run mongod server by the command mongod --dbpath "C:\Program Files\MongoDB\data\db" If I run only mongod it throws an exception

问题 I have a service layer between my app and the mongo database. I'm trying to build a unit test using moq I'm quite new to moq so I started with what I thought would be a trivial test. Code to test: public List<BsonDocument> GetAllSettings() { var collection = MongoDatabase.GetCollection<BsonDocument>("Settings"); var query = from e in collection.AsQueryable() select e; var settings = query.ToList(); return settings; } Where: Settings is a Collection MongoDatabase is a MongoDBDriver

问题 I was wondering if there's a way to insert documents into a MongoDB collection directly from a React component. My current personal project (for training purpose) is a little chat web application. So for example, when my user wants to post a new message in a room, the input component should look something like this: var NewMessageInput = React.createClass({ postMessage: function(value) { db.collection.insert({ content: value }); }, render: function() { return ( <div> <input onSubmit={() =>

问题 While connecting to mongodb via PHP7, I am getting following error: The "SCRAM-SHA-1" authentication mechanism requires libmongoc built with --enable-ssl This is probably due to libmongoc SSL disabled in php7: MongoDB support => enabled MongoDB extension version => 1.4.4 MongoDB extension stability => stable libbson bundled version => 1.9.4 libmongoc bundled version => 1.9.4 libmongoc SSL => disabled libmongoc crypto => disabled libmongoc SASL => disabled libmongoc compression => enabled