In Mongoose, using Find I am able to do something like bellow.
var activeUserQuests = ['51a02dade4b02780aeee5ab7', '51a0a40ce4b0cbb4519a8f69'];
Quest.find({_id: { $in: activeUserQuests} }, function(err, doc){
callback(doc);
});
What I'd like to do, is to do something similar, however go through a MapReduce function. Currently I have the following.
var o = {};
o.map = function() {
emit(this.problem.id, {problem:this.problem.title,quest:
{
title:this.title,
created_date: this.created_date,
updated_date: this.updated_date,
author: this.author,
description: this.description
}
});
}
o.reduce = function(previous, current) {
var array = [];
var res = {quests:array};
current.forEach(function (v) {
res.quests.push(v);
});
return res;
}
And calling the method like this
findAll: function(callback){
Quest.mapReduce(o, function(error, model, stats) {
callback(model);
});
}
My JSON looks like this:
[
{
"_id": "51a02dade4b02780aeee5ab7",
"title": "Foo",
"created_date": 2342423423423,
"updated_date": 23424234234233
},
///This one should not show up...
{
"_id": "99s8d7f9sdf79d9f7ds8f7",
"title": "Bar",
"created_date": 2342423423423,
"updated_date": 23424234234233
},
{
"_id": "51a0a40ce4b0cbb4519a8f69",
"title": "Bazz",
"author": "sdfsdfsf",
"created_date": 2342423423423,
"updated_date": 2342423423423,
"description": "Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua."
}
]
This works great, however I'd like to only show items that are fed through an array, as I did with the find(). Essentially, all I want to do is...based on an arbitrary number of items and producers, only show and group my own. I am assuming that by providing a list of IDs, I might speed up the return, in the event that there are a lot of items.
What i was looking for was
o.query = {_id: { $in: activeUserQuests} }
similar code block
findTimelineByQuery: function (query, fields, options, callback) {
var obj = {};
obj.map = function() {
emit(Date.UTC(this.created.getFullYear(), this.created.getMonth(), this.created.getDate()), {
created:this.created,
title:this.title,
type: this.type,
id: this._id,
owner: this.owner,
value: this.value
});
};
obj.reduce = function(previous, current) {
var array = [];
var res = {items:array};
current.forEach(function (v) {
res.items.push(v);
});
return res;
};
obj.verbose = true;
obj.query = query;
_Items.mapReduce(obj, function(error, model, stats) {
callback(model);
});
},
I missed the "Other options:" section here http://mongoosejs.com/docs/api.html#model_Model.mapReduce