Can't create mongodb db

Question

According to this documentation using use mays should create a db if it isn't already created:

MongoDB use DATABASE_NAME is used to create database. The command will create a new database, if it doesn't exist otherwise it will return the existing database.

So why doesn't mongo use mays work?

root@server88-208-249-95:~# mongo use mays
MongoDB shell version: 2.6.11
connecting to: use
2015-09-16T22:17:20.316+0100 file [mays] doesn't exist
failed to load: mays

Default directory for mongodb to store collections is /data/db do you have that folder ? — ODelibalta
– ODelibalta, Commented Sep 16, 2015 at 21:27
you need to be in the mongo shell $ mongo and then > use mays within it — aug2uag
– aug2uag, Commented Sep 16, 2015 at 21:31
Add that as the answer please :) /var/lib/mongodb this is my db path — Jamie Hutber
– Jamie Hutber, Commented Sep 16, 2015 at 21:33

Suhas Shelar · Accepted Answer · 2015-09-16 22:35:36Z

14

The 'use' command doesn't work with mongo command. You have to open mongo shell and then use the 'use' command.

Open terminal -> enter 'mongo' to get mongo shell -> use db_name

This will create a DB if it doesn't exists already.

A DB doesn't show up when using 'show dbs' until you create a collection in it.

Use db.createCollection("collection_name") and then use 'show dbs' and you will see your newly created DB.

answered Sep 16, 2015 at 22:35

Suhas Shelar

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AKoran · Accepted Answer · 2015-09-16 21:47:07Z

3

You need to create at least one collection before it saves the database. Issuing a use will create it, but will not automatically save it. You can create an empty collection with db.createCollection("test"). To verify try the following commands from the mongo shell:

use mays
show dbs   (mays will not show up)
db.createCollection("test")
show dbs   (mays will show up)

answered Sep 16, 2015 at 21:47

AKoran

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1 Comment

Trace Over a year ago

Thanks, although totally illogical not to show up when you just created it.

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