On Apr 29, 2013 5:40 PM, "akkdio" <[email protected]> wrote: > > am a beginner and I appreciate an answer to help me understand where my knowledge gap is: > > The app is to display a post. The posts belong to a category (appetizers, entrees...) My thought was to use scopes to display all the appetizers on the posts in one view and then have the entrees in another view and so on. > > The models: > > class Post < ActiveRecord::Base > attr_accessible :body, :category_id, :title > > belongs_to :category > > scope :appetizers, -> { where(post.category.name => "Appetizers")} > > end > > > class Category < ActiveRecord::Base > attr_accessible :name > > has_many :posts > end > > In the view I want to loop through the posts where the category name is "Appetizers". > > <table> > <tr> > <th>Title</th> > <th>Body</th> > <th>Category</th> > </tr> > > <% @post.appetizers.each do |app| %> > <tr> > <td><%= app.title %></td> > <td><%= app.body %></td> > <td><%= app.category.name%></td> > </tr> > <% end %> > </table> > > I am getting an "undefined method" error. I have tried searching for an example here that explains what is a correct solution. I also tried creating a method in the Post model like this: > > def appetizers_list > > @appetizer_list = Post.appetizers.all > > end > > Then call the method in the view: > > <% @appetizer_list.each do |app| %> > <tr> > <td><%= app.title %></td> > <td><%= app.body %></td> > <td><%= app.category.name%></td> > </tr> > > Obviously I am confusing what needs to be done after creating the scope and how to get the view to "see" it. Or if I need a scope at all and it can be done in a more simple way. > > So is there a best practices for retrieving subsets of data in rails and displaying them to the view?
what and where is the reported error? -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
