NPM command to drop mongo database, using "echo" not working

Question

I'm trying to create an npm command that drops a database from my mongo instance.

When I paste this line of code directly into my shell, it works, and gives the output below:

> echo 'db.dropDatabase()' | mongo musicappdb

MongoDB shell version v3.4.10
connecting to: mongodb://127.0.0.1:27017/musicappdb
MongoDB server version: 3.4.10
{ "ok" : 1 }
bye

However when I run it from my npm script, which is defined like this

scripts: {
     ...
     "drop-db": "echo 'db.dropDatabase()' | mongo musicappdb",
     ...
  },

I get

> echo "db.dropDatabase()" | mongo musicappdb

MongoDB shell version v3.4.10
connecting to: mongodb://127.0.0.1:27017/musicappdb
MongoDB server version: 3.4.10
db.dropDatabase()
bye

And the database is NOT getting dropped.

Why is the command not behaving properly when I issue through npm?

hey friend see this article maybe helps : http://antrikshy.com/blog/run-mongodb-automatically-nodejs-project — shahabvshahabi, Nov 27 '17 at 17:35
`echo 'db.dropDatabase()' | mongo musicappdb` is this command run in termial or mongoshell? — Zanko, Nov 27 '17 at 17:45

score 1 · Accepted Answer · answered Nov 27 '17 at 17:59

1

This worked for me:

"drop-db": "echo db.dropDatabase() | mongo musicappdb"

Without the single quotes.

It didn't work with either double or single quote. This is on Windows 10.

answered Nov 27 '17 at 17:59

Mika Sundland

18,120
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shahabvshahabi · Answer 2 · 2017-11-27T17:51:16.547

0

hey see this article maybe helps :

http://antrikshy.com/blog/run-mongodb-automatically-nodejs-project

just test :

'start mongo admin --eval "db.dropDatebase()" '

edited Nov 27 '17 at 17:51

answered Nov 27 '17 at 17:36

shahabvshahabi

937
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Thanks. Just tried with `mongo musicappdb --eval 'db.dropDatabase()'"` but still no luck from npm. Yet it works if I run directly in my terminal – CodyBugstein Nov 27 '17 at 17:44
maybe you must be admin to drop your databases – shahabvshahabi Nov 27 '17 at 17:48
Tried as admin, didn't work. Also it works without me being admin when doing in terminal directly – CodyBugstein Nov 27 '17 at 20:18

score 0 · Answer 3 · answered Dec 03 '19 at 12:47

"drop-db": "echo 'db.dropDatabase()' | mongo myDB"

This worked for me

Output was

MongoDB shell version v4.0.9
connecting to: mongodb://127.0.0.1:27017/myDB?gssapiServiceName=mongodb
Implicit session: session { "id" : UUID("44d9deb8-6de1-49ff-8532-24cf2ae5247b") }
MongoDB server version: 4.0.9
{ "ok" : 1 }
bye

score 0 · Answer 4 · answered Jun 09 '21 at 13:34

0

If someone is using Docker container:

docker exec -it mongodb_container sh -c "mongo db_name --eval 'db.dropDatabase()'"

answered Jun 09 '21 at 13:34

Matko

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NPM command to drop mongo database, using "echo" not working

4 Answers4