How to programmatically get the current database Mongoid is writing to?

Question

I am talking to multiple databases using Mongoid.override_database("database_name") using Mongoid with rails. How do I find the current database programmatically?

Mongoid docs on sessions: http://mongoid.org/en/moped/docs/driver.html define methods to override database but do not define a way to get the current database in use.

score 26 · Accepted Answer · edited Apr 22 '16 at 11:39

26

Got it!

Mongoid.default_session.options[:database]

edited Apr 22 '16 at 11:39

Sergio Tulentsev

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answered Oct 23 '12 at 21:30

Vamshidhar Behara

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It's now by symbol: `Mongoid.default_session.options[:database]` – stef Jan 04 '13 at 17:40
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Warning, this is NOT thread safe!! - if you are switching databases in a before_filter in your application controller, this returns the database name used in other threads in the application. – Hackeron Mar 31 '14 at 16:11
This seems to be deprecated. – B Seven Apr 16 '17 at 21:25
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It is now `Mongoid.default_client.options[:database]` – Anthony Persaud Aug 29 '20 at 20:37

score 8 · Answer 2 · answered Sep 22 '16 at 00:38

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The new way to get this is

Mongoid::Config.clients["default"]["database"]

You can also just have a look at

Mongoid::Config.clients

to see what else is available.

answered Sep 22 '16 at 00:38

user1130176

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You can use symbols as well. `Mongoid::Config.clients[:default][:database]` – Jason Sep 27 '16 at 19:47

score 4 · Answer 3 · answered Dec 25 '12 at 14:13

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If you want the overrided database you actually need to use

Mongoid::Threaded.database_override

answered Dec 25 '12 at 14:13

Nightscape

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score 4 · Answer 4 · answered Aug 06 '20 at 14:38

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Mongoid Version 7.0.5

Mongoid.client(:default).database

answered Aug 06 '20 at 14:38

Ekkstein

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Donald French · Answer 5 · 2019-01-27T18:32:39.967

Running Mongoid.default_session.options[:database] gives an error that default_session is invalid. It is now default_client. That works wonderfully.

Run it without the [:database] to get all the option and see the full configuration of your database.

Mongoid::Config.clients["default"]["database"] assumes you are NOT using the uri version of mongoid.yml. You will get nil in all cases. Use Mongoid::Config.clients["default"] to get the full configuration of the current database, or Mongoid::Config.clients["default"]['uri'] to give you just the full uri.

Pick the database name from the URI after the last port number/. There could be severalif using a sharded configuration

How to programmatically get the current database Mongoid is writing to?

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