added test and author selects for dit papers page, solved #31

app/controllers/authors_controller.rb

@@ -9,7 +9,7 @@ def show
   end
 
   def new
-  		@author = Author.new()
+  		@author = Author.new
   end
 
   def edit

app/views/papers/edit.html.erb

@@ -1,6 +1,19 @@
 
 <p><strong>Edit paper</strong></p>
 <%= form_for :paper, url: paper_path(@paper), method: :patch do |f| %>
+<% if @paper.errors.any? %>
+    <div id="error_explanation">
+      <h2>
+        <%= pluralize(@paper.errors.count, "error") %> prohibited
+        this author from being saved:
+      </h2>
+      <ul>
+        <% @paper.errors.full_messages.each do |msg| %>
+          <li><%=msg %></li>
+        <% end %>
+      </ul>
+    </div>
+  <% end %>
   <p>
     <%= f.label :title %><br>
     <%= f.text_field :title %>
@@ -14,8 +27,21 @@
     <%= f.label :year %><br>
     <%= f.text_field :year %>
   </p>
+    <% for i in 1..5 do %>
+    <p>
+        <%= f.label "Author  #" + i.to_s, for: "paper_author_id_" + i.to_s %>
+        <%= f.collection_select :author_ids, 
+            Author.all, 
+            :id, 
+            :name, 
+            {selected: @paper.author_ids[i], include_blank: '(none)'}, 
+            {name: "paper[author_ids][]", id: "paper_author_id_" + i.to_s} %>
+    </p>
+  <% end %>
 
   <p>
     <%= f.submit %>
   </p>
+
+
 <% end %>

app/views/papers/show.html.erb

@@ -17,5 +17,5 @@
 
 <p><strong>Authors:</strong></p>
 <% @paper.authors.each do |author| %>
-    <p><%= author.first_name %> <%= author.last_name %></p>
+    <p><%= author.name %></p>
 <% end %>

spec/features/paper/edit_paper_spec.rb

@@ -3,6 +3,7 @@
 describe "Edit paper page", type: :feature do
   before do
     @paper = create :paper
+    @paper2 = create :paper_with_author
   end
   it "Should render" do
     visit edit_paper_path(@paper)
@@ -15,6 +16,11 @@
     expect(page).to have_content('A new Title')
   end
 
+  it "Show authors" do
+    visit edit_paper_path(@paper2)
+    expect(page).to have_content('Alan')
+  end
+
 
 
 end