Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>I had the same problem just the other day. I figured out the solution after reading the CanCan readme, which you should do if you haven't yet. </p> <p>You can view my solution here: <a href="https://stackoverflow.com/questions/7102351/context-aware-authorization-using-cancan/7117410">Context aware authorization using CanCan</a></p> <p>To give you an answer more specific to your use case, do the follow:</p> <p>In your application controller you need to define some logic which will pick your abilities.</p> <pre><code>class ApplicationController &lt; ActionController::Base check_authorization def current_ability if &lt;no group selected logic&gt; # Maybe: params[:controller] == 'groups' @current_ability = NoGroupSelectedAbility.new(current_user) else @current_ability = GroupSelectedAbility.new(current_user) end end # Application Controller Logic Below end </code></pre> <p>You'll then need to create a new ability (or abilities) in your app/models/ folder. You can also do cool stuff like this:</p> <pre><code>if request.path_parameters[:controller] == groups @current_ability = GroupsAbility.new(current_group_relation) end </code></pre> <p>Where current_group_relation is defined in app/controllers/groups_controller.rb. This will give you specific abilities for specific controllers. Remember that a parent classes can call methods in child classes in Ruby. You can define a method in your controller, and call it from ApplicationController, as long as you are certain what controller is currently being used to handle the request. </p> <p>Hope that helps.</p> <p>EDIT: I wanted to show you what a custom ability looks like. </p> <pre><code># File path: app/models/group_ability.rb class GroupsAbility include CanCan::Ability # This can take in whatever you want, you decide what to argument to # use in your Application Controller def initialize(group_relation) group_relation ||= GroupRelation.new if group_relation.id.nil? # User does not have a relation to a group can :read, all elsif group_relation.moderator? # Allow a mod to manage all group relations associated with the mod's group. can :manage, :all, :id =&gt; group_relation.group.id end end end </code></pre>
    singulars
    1. This table or related slice is empty.
    1. PODefining abilities in more complex environment with role and group models
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USCommunity
    1. USMax
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PODefining abilities in more complex environment with role and group models
      singulars
      1. PTQuestion
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTAcceptedByOriginator
    2. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    3. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    1. COWow, freaky! :) Thanks. Guess it takes some time for me to get through it though.
      singulars
      1. PO
      1. USdennis
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload