如何在RoR上订购检索到的活动记录

Question

I am trying to retrieve ordered records from the ddbb and show them on a list. I get the right records but they are not ordered.

There is a column on rewards named "credits"

@rewards = Reward.where(:merchant_id => @merchant.id, :order => :credits)


<ul class="list-group">
    <% @rewards.each do |reward| %>
        <li class="list-group-item"><%= reward.name %>
            <span class="badge"><%= reward.credits %></span>
        </li>
    <% end %>
</ul>

I have also tried with no success:

 @rewards = Reward.where(:merchant_id => @merchant.id).order(credits: :desc)

I get something like this:

NAME Credits name1 - 20 name2 - 4 name3 - 25

Answer 1

 @rewards = Reward.where(:merchant_id => @merchant.id).order('credits desc')

您在此处混合了rails 4语法，因为您正在使用rails 3而无法使用

Answer 2

We have the following in our code, and it works, different syntax for rails 4

In Rails 3.2.11, Mongoid

Account.order_by(created_at: :desc)
or 
Account.order_by('created_at desc')

In Rails 4.0.3, Postgres + Activerecord

Account.order(created_at: :desc)
also this will work
Account.order('created_at desc')