mongodb

问题 I've been struggling to get a simple app running using Django, Djongo, Mongo, and Docker Compose. My setup looks like this: docker-compose.yml services: mongodb: image: mongo:latest restart: always environment: MONGO_INITDB_ROOT_USERNAME: root MONGO_INITDB_ROOT_PASSWORD: mongoadmin MONGO_INITDB_DATABASE: django_mongodb_docker ports: - 27017:27017 web: build: ./src restart: always command: python src/manage.py runserver 0.0.0.0:8000 volumes: - .:/code ports: - 8000:8000 links: - mongodb

问题 I want to use pymongo connection and methods to work with mongodb, but at the same time i want using mongoengine ORM. Sample: class User(Document): email = StringField(required=True) first_name = StringField(max_length=50) last_name = StringField(max_length=50) john = User(email='jonhd@example.com') john.first_name = 'Jonh' john.last_name = 'Hope' And now i want to insert new formed document User into my 'test_collection'. In case using only mongoengine i can do this: connect('test_database')

问题 Mongoose updateMany with different values by unique id like email Old BD Data: usersCollection = [ { _id: 1, email: "one@gmail.com", name: "one" }, { _id: 2, email: "two@gmail.com", name: "two" }, { _id: 3, email: "three@gmail.com", name: "three" } ]; Coming Data: users = [ { email: "one@gmail.com", name: "oneeee" }, { email: "two@gmail.com", name: "twoooo" }, { email: "three@gmail.com", name: "three" }, { email: "three@gmail.com", name: "four" } ]; What I'm expecting to to have after insert

问题 I am making react project using express.js, mongodb, react.js, and node.js. and trying to fetch data from backend api which is running on port 5000. When I check the api using postman , it is working. And the data is showing in the browser's console. Also, when I press Get button as given in the code below, it doesn't work on the browser. But I'm able to see the array data in the browser's console. <Button onClick={()=><li>{employeeItem}</li>}>Get</Button> Here is my full code: import React,

问题 I am trying to run my mongodb. So I go to the appropriate folder's location and type: $ mongod --dbpath=data Then I get a funny message which I don't know how to fix. ----- BEGIN BACKTRACE ----- ... ... ... ----- END BACKTRACE ----- Abort trap: 6 Any ideas how can this be fixed? Thanks, Theo. 来源： https://stackoverflow.com/questions/50185943/abort-trap-6-in-mongodb-mac-os

问题 I am trying to run my mongodb. So I go to the appropriate folder's location and type: $ mongod --dbpath=data Then I get a funny message which I don't know how to fix. ----- BEGIN BACKTRACE ----- ... ... ... ----- END BACKTRACE ----- Abort trap: 6 Any ideas how can this be fixed? Thanks, Theo. 来源： https://stackoverflow.com/questions/50185943/abort-trap-6-in-mongodb-mac-os

问题 I have generic collection name in my mongodb and I want to use a string variable to call these collection. For example: from pymongo import MongoClient client= MongoClient() db = client.mydb collec_id='123' mycollection = db.collection123 How can I get mycollection using collec_id Any help appreciated 回答1: As you seems noticed you cannot use dot ( . ) here. You need to use bracket [] to compute your collections' name. Here you use the + operator to concatenate collection and collect_id .

问题 I have generic collection name in my mongodb and I want to use a string variable to call these collection. For example: from pymongo import MongoClient client= MongoClient() db = client.mydb collec_id='123' mycollection = db.collection123 How can I get mycollection using collec_id Any help appreciated 回答1: As you seems noticed you cannot use dot ( . ) here. You need to use bracket [] to compute your collections' name. Here you use the + operator to concatenate collection and collect_id .

问题 I have a model Entry to which includes details of a hospital at a particular time. The data looks like this: { "_id": "5ef9c7337874820008c1a026", "date": 1593427763640, //... some data "hospital": { "_id": "5ef8d06630c364000840bb6d", "name": "City Hospital", //... some data }, } I want to get the last query of each day grouped by the hospital ID. In MySQL, it can be achieved using INNER JOIN. How can I do it using MongoDB? 回答1: Given a day, calculate start and end of a day. This is to be used

问题 I have User object: { "_id" : ObjectId("599e670f2720317af451db9e"), "Cars" : [ { "Name" : "Car 1", "Labels" : [ { "Label" : "Main", "Color" : "#F49973" } ] }, { "Name" : "Car 2", "Labels" : [ { "Label" : "Main", "Color" : "#F49973" }, { "Label" : "Secondary", "Color" : "#E2E2E2" } ] } ] } I want to find document by user id and car name, then select this car. I am trying to do this: await _collection.AsQueryable().Where(u => u.Id == someId && u.Cars.Any(s => s.Name == someName)) .Select(u => u