WebStarting in MongoDB 4.2, when replacing a document, update attempts to target a shard, first by using the query filter. If the operation cannot target a single shard by the query filter, it then attempts to target by the replacement document. In earlier versions, the operation attempts to target using the replacement document. Shard Key ... WebTo replace ALL occurrences of the substring in your document use: db.media.find ( {mediaContainer:"ContainerS3"}).forEach (function (e,i) { var find = "//a.n.com"; …

MongoDB: How to find and replace ObjectId across collection

WebJul 16, 2012 · MongoDB does not have in-built support for search and replace of a portion of a string. You could write a program in your favourite scripting language to do this. You can use regular expression searching to get back all the URLs that start with "http:": db.picture.find ( {url: /^http:/}) mynhfirst

2 Ways to Replace a Substring in MongoDB - database.guide

WebJan 27, 2024 · Across collections/models, every reference to this type of document uses the same key, "docFieldKey." However the path is often different so sometimes it's at the top-level, sometimes in an array of objects within the document. ExModelA: { _id: ObjectId, docFieldKey: string // if docAId, replace with docBId } The reference to docA could be in … WebJan 23, 2024 · So let’s start with Query conditionals: MongoDB uses JSON-like syntax for queries, hence using some operators like > or < won’t work. So we need operators to replace all the mathematical comparison operators. So we introduce : $lt, $lte, $gt, $gte, to replace respectively: <, <=, >, >=. WebAug 18, 2011 · In MongoDB, this worked: db.users.find ( { email: { $regex: /^[email protected]$/i }}) Both lines are case-insensitive. The email in the DB could be [email protected] and both lines will still find the object in the DB. Likewise, we could use /^[email protected]$/i and it would still find email: [email protected] in the … mynhlearn login