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chilismaug/mongshl-show-dbs.js

Last active August 23, 2018 17:35
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Common first experiment in mongo shell is saying "show dbs" to see list of databases on the current server. But how to do in a mongo js shell script?
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mongshl-show-dbs.js
print("let's try 'listDatabases'");
dblist = JSON.stringify( db.adminCommand('listDatabases'), undefined, 2);
// stringify options 2 & 3 add pretty-like spaces
print(dblist) ;
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chilismaug commented Aug 23, 2018 •
edited

When I was going through the basics of the shell in O'Reilly's "MongoDB - The Definitive Guide", there is some discussion of running js shell scripts but the given js equivalent for shell helper "show dbs" would not work in a script, it returns a BSON object that only displays as text while you are in the shell. The command line script output will be "[object BSON]".
This is how to get it to display when running the script from the command line.
to run: mongo mongshl-show-dbs.js

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