Allowing nil waiver/orientation dates, adjusting permissions of users

app/models/ability.rb

@@ -6,7 +6,7 @@ class Ability
       if user.admin?
         can :manage, :all
       else
-        can :read, User, :id => user.id
+        can :read, User
         can :read, Card, :user_id => user.id
       end
     end 

app/views/users/_form.html.erb

@@ -21,11 +21,11 @@
   </div>
   <div class="field">
     <%= f.label :waiver %><br />
-    <%= f.date_select :waiver %>
+    <%= f.date_select :waiver, :include_blank => 'true', :default => 'nil' %>
   </div>
   <div class="field">
     <%= f.label :orientation %><br />
-    <%= f.date_select :orientation %>
+    <%= f.date_select :orientation, :include_blank => 'true', :default => 'nil' %>
   </div>
   <div class="field">
     <%= f.label :emergency_name %><br />

app/views/users/index.html.erb

@@ -7,7 +7,9 @@
   <tr>
     <th>Name</th>
     <th>Email</th>
+    <% if current_user.admin? then %>
       <th>Cards</th>
+    <% end %>
     <th>Active?</th>
     <th>Waiver?</th>
     <th>Admin?</th>
@@ -20,11 +22,11 @@
   <tr>
     <td><%= user.name %></td>
     <td><%= user.email %></td>
-    <td>
+    <% if current_user.admin? then %><td>
       <% user.cards.each do |c| %>
         <%= link_to c.card_number, card_url(c) %><%= "," unless c == user.cards.last %>
       <% end %>
-    </td>
+    </td><% end %>
     <td><%= if user.active? then "Active" end %></td>
     <td><%= if user.waiver.blank? then "Not Signed" else "Signed" end %></td>
     <td><%= if user.admin? then "Admin" end %></td>