Rails字段排序的前3条记录

Question

In ruby on rails how do I find the top 3 records of my table called notices ordered by a particular field, in my case I want to order by the position field which is an integer.

So my notices table looks like this:

Any help would be greatly appreciated.

Answer 1

考虑到您有Notice ActiveRecord类，应该这样做： Notice.find(:all, :limit => 3, :order => 'particularField')

Answer 2

You'd do something like:

Notice.find(:all,:order => "position", :limit => 3)

That would bring the 3 first records ordered by position (in this example, positions 1,2,3 or the first lesser ones. You can change the order value to "position DESC" if you want positions 20,19,18, for example).

Good luck!