MongoDB "eval" order of execution

Question

How using MongoDB shell define function and use it?

In a script file createusers.js there is following code to create a user with read role on specific database.

function createReader(database, username, password)
{
db.getSiblingDB(database).createUser({
    user  : username,
    pwd   : password,
    roles : [ { role : "read", db : database } ]
});
}

Is there possibility to execute this function in mongodb shell? The following call doesn't succeed

mongo --eval="createReader('somedb', 'user1', 'pass1')" createusers.js

gives error createReader is not defined.

Answer 1

You can use load() to load the js file from eval:

mongo --eval "load('createusers.js'); createReader('somedb', 'user1', 'pass1')"