How would you find a collection dynamically in Meteor with a value?
Given that I have 3 collection types and a dynamic value, how would I figure out which collection to look for based on this dynamic value?
For example,
array = [
{id: 'one', type: 'profile'},
{id: 'something', type: 'post'},
{id: 'askjdaksj', type: 'comment']
]
How can I isolate a type and turn it into a collection? Basically pivot type in Collection.find
array[0].type.find({_id: id});
=> Profiles.find({_id: id});
Is it possible?
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1 answer
Here's a complete working example:
Posts = new Mongo.Collection('posts');
Comments = new Mongo.Collection('comments');
var capitalize = function(string) {
return string.charAt(0).toUpperCase() + string.slice(1);
};
var nameToCollection = function(name) {
// pluralize and capitalize name, then find it on the global object
// 'post' -> global['Posts'] (server)
// 'post' -> window['Posts'] (client)
return this[capitalize(name) + 's'];
};
Meteor.startup(function() {
// ensure all old documents are removed
Posts.remove({});
Comments.remove({});
// insert some new documents
var pid = Posts.insert({text: 'I am a post'});
var cid = Comments.insert({text: 'I am a comment'});
var items = [
{id: pid, type: 'post'},
{id: cid, type: 'comment'}
];
_.each(items, function(item) {
// find the collection object based on the type (name)
var collection = nameToCollection(item.type);
// retrieve the document from the dynamically found collection
var doc = collection.findOne(item.id);
console.log(doc);
});
});
Recommended reading: link collections .
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