view role titles of the user through assignment table

Hey I hope you 开发者_开发知识库can help me here.

I got a Role model:

has_many :users, :through => :role_assignments

has_many :role_assignments

a role assignment model:

belongs_to :user

belongs_to :role

and a user model:

has_many :roles, :through => :role_assignments

has_many :role_assignments

I want to display the users roles in a view. I tried some stuff like: user.roles.names but it didnt work

Since user.roles is an collection (array) of roles, you can't call names directly. Now I assume that the attribute you want to access is name so in that case you could do:

user.roles.map(&:name).join(", ")

which will collect all the names from the roles and then join them into a string seperated by commas. That is very simple and not very flexible. If you instead want to style it in some way you could do like this:

<% user.roles.each do |role| %>
  <p>Role: <%= role.name %></p>
<% end %>