mongodb check collection exist
2017年11月7日 — Use db.getCollectionNames() and then test for existence of the collection you seek with indexOf() e.g. idx = db.getCollectionNames(). ,The collection specified may or may not exist on the server. If the collection does not exist, MongoDB creates it implicitly as part of write operations like ... ,2019年11月22日 — I want to create collection in mongoDB 4.2 but I want to check that is exist or not? I'm using Node.JS and Express and I'm NOT using Mongoose ... ,2020年4月23日 — I want to check a collection exists or not. If it exists delete it or if not exist make it. for example: if (collectionName) delete collectionName; } else ... ,2020年11月27日 — I need to check if a collection exists on a certain database and create it if it doesn't. I ... . but I need an independent function to check that. ,2015年3月8日 — In MongoDB 3.0 and later, you have to run a command to list all collections in a database: use test; db. runCommand( listCollections: 1 } ); ,2016年2月18日 — MyCollection = new Mongo.Collection(“example”);. But the Collection doesn't exist until you insert some data, or am I wrong here? ,2014年5月12日 — If you want to hit mongodb directly via the node.js native api you can use db.collectionNames():. List existing collections. List names. ,2019年4月27日 — What's the correct way to check if a collection exists? mongodb php-mongodb. Previously I was checking if a collection exists by querying the ...
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 mongodb check collection exist 相關參考資料
Check if collection exists in mongodb using MongoDBDriver ...
2017年11月7日 — Use db.getCollectionNames() and then test for existence of the collection you seek with indexOf() e.g. idx = db.getCollectionNames(). https://stackoverflow.com db.getCollection() — MongoDB Manual
The collection specified may or may not exist on the server. If the collection does not exist, MongoDB creates it implicitly as part of write operations like ... https://docs.mongodb.com How can I find the Collection exist in MongoDB 4.2 ? using ...
2019年11月22日 — I want to create collection in mongoDB 4.2 but I want to check that is exist or not? I'm using Node.JS and Express and I'm NOT using Mongoose ... https://stackoverflow.com How to check if a collection exists and delete it? - MongoDB ...
2020年4月23日 — I want to check a collection exists or not. If it exists delete it or if not exist make it. for example: if (collectionName) delete collectionName; } else ... https://developer.mongodb.com How to check if a collection exists in Mongodb ... - Edureka
2020年11月27日 — I need to check if a collection exists on a certain database and create it if it doesn't. I ... . but I need an independent function to check that. https://www.edureka.co How to check if a collection exists in Mongodb native nodejs ...
2015年3月8日 — In MongoDB 3.0 and later, you have to run a command to list all collections in a database: use test; db. runCommand( listCollections: 1 } ); https://stackoverflow.com How to check if an Collection exists? - help - Meteor forums
2016年2月18日 — MyCollection = new Mongo.Collection(“example”);. But the Collection doesn't exist until you insert some data, or am I wrong here? https://forums.meteor.com How to check if collection exists in MongoDB with Node.js ...
2014年5月12日 — If you want to hit mongodb directly via the node.js native api you can use db.collectionNames():. List existing collections. List names. https://stackoverflow.com What's the correct way to check if a collection exists? - Stack ...
2019年4月27日 — What's the correct way to check if a collection exists? mongodb php-mongodb. Previously I was checking if a collection exists by querying the ... https://stackoverflow.com |