Question

I’m working on an problem I can’t solve.

I have the following:

Groups table:

create_table "groups", :force => true do |t|
  t.string   "name"
  t.datetime "created_at", :null => false
  t.datetime "updated_at", :null => false
end

Groupships table:

create_table "groupships", :force => true do |t|
  t.integer  "group_id"
  t.integer  "user_id"
  t.datetime "created_at", :null => false
  t.datetime "updated_at", :null => false
  t.boolean  "owner"
  t.text     "permission"
end

group.rb:

class Group < ActiveRecord::Base
   belongs_to :user
   has_many :groupships
   has_many :groups, through: :groupships
end

groupship.rb:

class Groupship < ActiveRecord::Base
   belongs_to :user
   belongs_to :group
end

I want to see if a user is the owner of a group and what permissions the user has, through groupship.
Is that possible, or do I have to make a group_perssions table?

I tried this in a view:

<% @groups.each do |group| %>
   <div class="well well-small">
      <h3><%= group.name %></h3>
      Owner: <%= group.groupships.owner %> //True or false readout for development.
   </div>
<% end %>

Answer 1

I think the example you gave of your Groupship class may be slightly wrong. Shouldn’t it be..

class Group < ActiveRecord::Base
  has_many :groupships
  has_many :users, through: :groupships
end

A group can have many users and a user can have many groups right?

As for the view example you gave, you can’t simply call group.groupships.owner because group.groupships is a collection, and the owner boolean is a property of a single groupship. You could do something like this instead:

<% @groups.each do |group| %>
  <div class="well well-small">
    <h3><%= group.name %></h3>
    Owners:
    <%= group.groupships.each do |groupship| %>
      <%= groupship.user.name %>:
      <%= groupship.owner? %>
    <% end -%>
  </div>
<% end %>