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e:\Projects\NodeJS\fl>node app.js
(node:12336) Warning: Accessing non-existent property 'count' of module exports inside circular dependency
(Use node --trace-warnings ... to show where the warning was created)
(node:12336) Warning: Accessing non-existent property 'findOne' of module exports inside circular dependency
(node:12336) Warning: Accessing non-existent property 'remove' of module exports inside circular dependency
(node:12336) Warning: Accessing non-existent property 'updateOne' of module exports inside circular dependency
(node:12336) DeprecationWarning: current Server Discovery and Monitoring engine is deprecated, and will be removed in a future version. To use the new Server Discover and Monitoring engine, pass option { useUnifiedTopology: true } to the MongoClient constructor.
server run at port 3000
connection error MongoNetworkError: failed to connect to server [localhost:27017] on first connect [Error: connect ECONNREFUSED 127.0.0.1:27017
at TCPConnectWrap.afterConnect [as oncomplete] (node:net:1187:16) {
name: 'MongoNetworkError',
[Symbol(mongoErrorContextSymbol)]: {}
}]
at Pool. (e:\Projects\NodeJS\4569\01_pr\01\fl\node_modules\mongodb\lib\core\topologies\server.js:438:11)
at Pool.emit (node:events:527:28)
at e:\Projects\NodeJS\4569\01_pr\01\fl\node_modules\mongodb\lib\core\connection\pool.js:561:14
at e:\Projects\NodeJS\4569\01_pr\01\fl\node_modules\mongodb\lib\core\connection\pool.js:994:11
at e:\Projects\NodeJS\4569\01_pr\01\fl\node_modules\mongodb\lib\core\connection\connect.js:31:7
at callback (e:\Projects\NodeJS\4569\01_pr\01\fl\node_modules\mongodb\lib\core\connection\connect.js:264:5)
at Socket. (e:\Projects\NodeJS\4569\01_pr\01\fl\node_modules\mongodb\lib\core\connection\connect.js:294:7)
at Object.onceWrapper (node:events:642:26)
at Socket.emit (node:events:527:28)
at emitErrorNT (node:internal/streams/destroy:157:8)
at emitErrorCloseNT (node:internal/streams/destroy:122:3)
at processTicksAndRejections (node:internal/process/task_queues:83:21) {
[Symbol(mongoErrorContextSymbol)]: {}
}