Question

in mysql I can administer my database (the primary goal is to a have an automated build of the database by sequentially applying changes to it with scripts) by running commands like this:

mysql -u root my_database < script_1.sql
mysql -u root my_database < script_2.sql

Where script_1.sql looks like this:

DROP DATABASE IF EXISTS my_database;
CRATE DATABASE my_database;

And script_2.sql something like this:

INSERT INTO ...

Ok, I want to to the same for mongo, but instead of running SQL commands I would like to run mongo db commands.

Is something like that possible?

Answer 1

First, in mongo, objects are created on the fly (when you insert the first object in the first collection of a database), so maybe you don’t need to create database and collection.

Then you can use 2 different tools to populate your databases with objects : mongoimport and mongo

mongo -d myDatabase --eval  "db.aCollection.insert({_id : ..,....,....})"

or

mongo -d myDatabase --eval bob.js

can execute any javascript you want. This is done with a lock on the db, so do not use this on an instance that is used for requests.

The second method is to use mongoimport as said on other response. This is easier if you have a list of objects and no other type of commands. Note that objects are upserted (not inserted) so duplicates should not fail.