Running a findOne on a variable holding collection name does not work

help
1

Just wanted to know why this is happening and how it can be circumvented.

getInformationOn: function(id,collection) {

       return collection.findOne({_id:id});
}

Result of calling this function:

I20171109-18:20:57.304(5.5)? Calling 'getInformationOn', arguments: [ 'KrAubggQ8cdf7dGJD', 'policies' ]
I20171109-18:20:57.466(5.5)? Exception while invoking method 'getInformationOn' TypeError: collection.findOne is not a function
I20171109-18:20:57.467(5.5)?     at [object Object].Meteor.methods.getInformationOn (server/methods/getInformationMethod.js:41:25)
2

It doesn’t work, because the name of a collection is not the collection itself.

3

Hmm. So then I suppose I’ll have to check which collection it is and then directly query the collection.

4

or you can pass the collection object to the function…

5

If you really have to, you can look at Meteor.connection._stores object ( disclaimer: _ is convention for private attributes…)

6

Sorry, I drew a blank with this. How do I do this?

7

My turn to apologise, was not clear. I assumed that the caller of the getInformationOn function would have access to the Collection object and could pass that object instead of the collection name string. i.e.,

given that:

PoliciesCollection = new Mongo.Collection ('policies')

then instead of:

let retrievedDocument = getInformationOn('KrAubggQ8cdf7dGJD', 'policies');

use:

let retrievedDocument = getInformationOn('KrAubggQ8cdf7dGJD', PoliciesCollection);

but of course I don’t understand the context of and what you are trying to do (why having a function with a single return statement?), so I was only guessing…