How can you remove all documents from a collection with Mongoose?
DateTime.remove({}, callback) The empty object will match all of them.
mongodb
MongoDB Show all contents from all collections
Once you are in terminal/command line, access the database/collection you want to use as follows: choose your collection and type the following to see all contents of that collection: More info here on the MongoDB Quick Reference Guide.
MongoDB: How to find the exact version of installed MongoDB
Just run your console and type: https://docs.mongodb.com/manual/reference/method/db.version/
How do I remove documents using Node.js Mongoose?
docs is an array of documents. so it doesn’t have a mongooseModel.remove() method. You can iterate and remove each document in the array separately. Or – since it looks like you are finding the documents by a (probably) unique id – use findOne instead of find.
How do you put an image file in a json object?
I can think of doing it in two ways: 1. Storing the file in file system in any directory (say dir1) and renaming it which ensures that the name is unique for every file (may be a timestamp) (say xyz123.jpg), and then storing this name in some DataBase. Then while generating the JSON you pull this filename … Read more
Unable to connect to mongolab, Getting MongoError: auth failed
Make sure you are using the database username and password not the account username and password from Mlab. In MLab, formerly MongoLab, do the following Navigate to Users Add Database User Choose your username and password Now you can test this on the shell with mongo ds061374.mlab.com:61374/yourdb -u <dbuser> -p <dbpassword>
Mongoose: CastError: Cast to ObjectId failed for value “[object Object]” at path “_id”
Short answer: use mongoose.Types.ObjectId. Mongoose (but not mongo) can accept object Ids as strings and “cast” them properly for you, so just use: However, the caveat is if req.params.id is not a valid format for a mongo ID string, that will throw an exception which you must catch. So the main confusing thing to understand is that mongoose.SchemaTypes has stuff … Read more
E11000 duplicate key error index in mongodb mongoose
The error message is saying that there’s already a record with null as the email. In other words, you already have a user without an email address. The relevant documentation for this: If a document does not have a value for the indexed field in a unique index, the index will store a null value for this … Read more
E: Unable to locate package mongodb-org
I faced same issue but fix it by the changing the package file section command. The whole step that i followed was: At first try with this command: sudo apt-get install -y mongodb This is the unofficial mongodb package provided by Ubuntu and it is not maintained by MongoDB and conflict with MongoDB’s offically supported … Read more
Difference between MongoDB and Mongoose
I assume you already know that MongoDB is a NoSQL database system which stores data in the form of BSON documents. Your question, however is about the packages for Node.js. In terms of Node.js, mongodb is the native driver for interacting with a mongodb instance and mongoose is an Object modeling tool for MongoDB. mongoose is built on top of the mongodb driver to provide programmers … Read more