Creating new Meteor collections on the fly - mongodb

Question

Is it possible to create new Meteor collections on-the-fly? I'd like to create foo_bar or bar_bar depending on some pathname which should be a global variable I suppose (so I can access it throughout my whole application).
Something like:
var prefix = window.location.pathname.replace(/^\/([^\/]*).*$/, '$1');
var Bar = new Meteor.Collection(prefix+'_bar');
The thing here is that I should get my prefix variable from URL, so if i declare it outside of if (Meteor.isClient) I get an error: ReferenceError: window is not defined. Is it possible to do something like that at all?
Edit : Using the first iteration of Akshats answer my project js : http://pastie.org/6411287

Answer 1

I'm not entirely certain this will work:
You need it in two pieces, the first to load collections you've set up before (on both the client and server)
var collections = {};
var mysettings = new Meteor.Collection('settings') //use your settings
//Startup
Collectionlist = mysettings.find({type:'collection'});
Collectionlist.forEach(function(doc) {
collections[doc.name] = new Meteor.Collection(doc.name);
})'
And you need a bit to add the collections on the server:
Meteor.methods({
'create_server_col' : function(collectionname) {
mysettings.insert({type:'collection', name: collectionname});
newcollections[collectionname] = new Collection(collectionname);
return true;
}
});
And you need to create them on the client:
//Create the collection:
Meteor.call('create_server_col', 'My New Collection Name', function(err,result) {
if(result) {
alert("Collection made");
}
else
{
console.log(err);
}
}
Again, this is all untested so I'm just giving it a shot hopefully it works.
EDIT
Perhaps the below should work, I've added a couple of checks to see if the collection exists first. Please could you run meteor reset before you use it to sort bugs from the code above:
var collections = {};
var mysettings = new Meteor.Collection('settings')
if (Meteor.isClient) {
Meteor.startup(function() {
Collectionlist = mysettings.find({type:'collection'});
Collectionlist.forEach(function(doc) {
eval("var "+doc.name+" = new Meteor.Collection("+doc.name+"));
});
});
Template.hello.greeting = function () {
return "Welcome to testColl.";
};
var collectionname=prompt("Enter a collection name to create:","collection name")
create_collection(collectionname);
function create_collection(name) {
Meteor.call('create_server_col', 'tempcoll', function(err,result) {
if(!err) {
if(result) {
//make sure name is safe
eval("var "+name+" = new Meteor.Collection('"+name+"'));
alert("Collection made");
console.log(result);
console.log(collections);
} else {
alert("This collection already exists");
}
}
else
{
alert("Error see console");
console.log(err);
}
});
}
}
if (Meteor.isServer) {
Meteor.startup(function () {
// code to run on server at startup
Collectionlist = mysettings.find({type:'collection'});
Collectionlist.forEach(function(doc) {
collections[doc.name] = new Meteor.Collection(doc.name);
});
});
Meteor.methods({
'create_server_col' : function(collectionname) {
if(!mysettings.findOne({type:'collection', name: collectionname})) {
mysettings.insert({type:'collection', name: collectionname});
collections[collectionname] = new Meteor.Collection(collectionname);
return true;
}
else
{
return false; //Collection already exists
}
}
});
}
Also make sure your names are javascript escaped.

Answer 2

Things got much easier:
var db = MongoInternals.defaultRemoteCollectionDriver().mongo.db;
db.createCollection("COLLECTION_NAME", (err, res) => {
console.log(res);
});
Run this in your server method.