Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
933 views
in Technique[技术] by (71.8m points)

mongodb - How can I sort a Meteor collection by time of insertion?

I am working on my first project using Meteor, and am having some difficulty with sorting.

I have a form where users enter aphorisms that are then displayed in a list. Currently the most recent aphorisms automatically display at the bottom of the list. Is there an easy way to have the most recent appear at the top of the list instead?

I tried:

   Template.list.aphorisms = function () {
    return Aphorisms.find({}, {sort: {$natural:1}});
};

And am stumped because the Meteor docs don't have many examples.

See Question&Answers more detail:os

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Reply

0 votes
by (71.8m points)

Assuming that the date_created is in a valid date format along with the timestamp, You should insert the parsed value of date_created using Date.parse() javascript function, which gives the number of milliseconds between January 1, 1970 and date value contained in date_created.

As a result of that, the most recently added record will contain greater value of date_created than the record inserted before it.

Now when fetching the records, sort the cursor in descending order of the date_created parameter as:

 Aphorisms.find({}, {sort: {date_created: -1}});

This will sort records from newer to older.

Hope this helps.


与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
OGeek|极客中国-欢迎来到极客的世界,一个免费开放的程序员编程交流平台!开放,进步,分享!让技术改变生活,让极客改变未来! Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

...