The format used is as follow :
$ rails generate scaffold <resource name> <list of fields>
$ rails generate scaffold test_j author:string title:string tag:string content:text create_datetime:timestamp
Create associated table in the database.
$ rake db:migrate
Then you are done! This new resource can be accessed by http://0.0.0.0:3000/<resource name>/
For the example that I used, it would be http://http://0.0.0.0:3000/test_js/
Click on the New Test_j link will give you the form that we created with the one line command earlier.
Note that, the date time is showing current GMT time. I haven't figured out why/how matters. :)