In Mongoose, how do I sort by date? (node.js)
题
let's say I run this query in Mongoose:
Room.find({}, function(err,docs){
}).sort({date:-1});
This doesn't work!
解决方案
Sorting in Mongoose has evolved over the releases such that some of these answers are no longer valid. As of the 4.1.x release of Mongoose, a descending sort on the date
field can be done in any of the following ways:
Room.find({}).sort('-date').exec(function(err, docs) { ... });
Room.find({}).sort({date: -1}).exec(function(err, docs) { ... });
Room.find({}).sort({date: 'desc'}).exec(function(err, docs) { ... });
Room.find({}).sort({date: 'descending'}).exec(function(err, docs) { ... });
Room.find({}).sort([['date', -1]]).exec(function(err, docs) { ... });
Room.find({}, null, {sort: '-date'}, function(err, docs) { ... });
Room.find({}, null, {sort: {date: -1}}, function(err, docs) { ... });
For an ascending sort, omit the -
prefix on the string version or use values of 1
, asc
, or ascending
.
其他提示
The correct answer is:
Blah.find({}).sort({date: -1}).execFind(function(err,docs){
});
Been dealing with this issue today using Mongoose 3.5(.2) and none of the answers quite helped me solve this issue. The following code snippet does the trick
Post.find().sort('-posted').find(function (err, posts) {
// user posts array
});
You can send any standard parameters you need to find()
(e.g. where clauses and return fields) but no callback. Without a callback it returns a Query object which you chain sort()
on. You need to call find()
again (with or without more parameters -- shouldn't need any for efficiency reasons) which will allow you to get the result set in your callback.
I do this:
Data.find( { $query: { user: req.user }, $orderby: { dateAdded: -1 } } function ( results ) {
...
})
This will show the most recent things first.
Post.find().sort({date:-1}, function(err, posts){
});
Should work as well
EDIT:
You can also try using this if you get the error sort() only takes 1 Argument
:
Post.find({}, {
'_id': 0, // select keys to return here
}, {sort: '-date'}, function(err, posts) {
// use it here
});
See if this helps > How to sort in mongoose?
Also read this > http://www.mongodb.org/display/DOCS/Sorting+and+Natural+Order
Short solution:
const query = {}
const projection = {}
const options = { sort: { id: 1 }, limit: 2, skip: 10 }
Room.find(query, projection, options).exec(function(err, docs) { ... });