wiki pages: replace show_or_new page with redirects.

* Redirect the show_or_new action to either the show page or the new
  page. Don't use show_or_new to render nonexistent wikis; do that in the
  regular show action instead.

* Make the show action return 404 for nonexistent wikis.

app/controllers/wiki_pages_controller.rb

@@ -33,7 +33,8 @@ class WikiPagesController < ApplicationController
     @wiki_page, found_by = WikiPage.find_by_id_or_title(params[:id])
 
     if request.format.html? && @wiki_page.blank? && found_by == :title
-      redirect_to show_or_new_wiki_pages_path(title: params[:id])
+      @wiki_page = WikiPage.new(title: params[:id])
+      respond_with @wiki_page, status: 404
     elsif request.format.html? && @wiki_page.present? && found_by == :id
       redirect_to @wiki_page
     elsif @wiki_page.blank?
@@ -69,15 +70,10 @@ class WikiPagesController < ApplicationController
   end
 
   def show_or_new
-    @wiki_page = WikiPage.find_by_title(params[:title])
-
     if params[:title].blank?
       redirect_to new_wiki_page_path(wiki_page_params(:create))
-    elsif @wiki_page.present?
-      redirect_to wiki_page_path(@wiki_page)
     else
-      @wiki_page = WikiPage.new(:title => params[:title])
-      respond_with(@wiki_page)
+      redirect_to wiki_page_path(params[:title])
     end
   end
 

app/views/wiki_pages/show.html.erb

@@ -19,7 +19,11 @@
         <p><%= wiki_page_other_names_list(@wiki_page) %></p>
       <% end %>
 
-      <%= format_text(@wiki_page.body) %>
+      <% if @wiki_page.new_record? %>
+        <p>This wiki page does not exist. <%= link_to "Create new wiki page", new_wiki_page_path(wiki_page: { title: @wiki_page.title }) %>.</p>
+      <% else %>
+        <%= format_text(@wiki_page.body) %>
+      <% end %>
 
       <% if @wiki_page.artist %>
         <p><%= link_to "View artist", @wiki_page.artist %></p>

app/views/wiki_pages/show_or_new.html.erb

@@ -1,24 +0,0 @@
-<%= render "sidebar" %>
-
-<% content_for(:content) do %>
-  <h1 id="wiki-page-title">
-    <%= link_to @wiki_page.pretty_title, posts_path(:tags => @wiki_page.title), :class => "tag-type-#{@wiki_page.category_name}" %>
-  </h1>
-  <div id="wiki-page-body" class="prose">
-    <p>This wiki page does not exist. <%= link_to "Create new wiki page", new_wiki_page_path(:wiki_page => {:title => params[:title]}) %>.</p>
-  </div>
-
-  <% if @wiki_page.artist.present? %>
-    <p><%= link_to "View artist", @wiki_page.artist %></p>
-  <% end %>
-
-  <%= wiki_page_alias_and_implication_list(@wiki_page)%>
-
-  <%= wiki_page_post_previews(@wiki_page) %>
-<% end %>
-
-<%= render "secondary_links" %>
-
-<% content_for(:page_title) do %>
-  Wiki - <%= params[:title] %> - <%= Danbooru.config.app_name %>
-<% end %>

test/functional/wiki_pages_controller_test.rb

@@ -66,9 +66,11 @@ class WikiPagesControllerTest < ActionDispatch::IntegrationTest
         assert_response :success
       end
 
-      should "redirect html requests for a nonexistent title" do
+      should "show the 'does not exist' page for a nonexistent title" do
         get wiki_page_path("what")
-        assert_redirected_to(show_or_new_wiki_pages_path(title: "what"))
+
+        assert_response 404
+        assert_select "#wiki-page-body", text: /This wiki page does not exist/
       end
 
       should "return 404 to api requests for a nonexistent title" do
@@ -98,9 +100,9 @@ class WikiPagesControllerTest < ActionDispatch::IntegrationTest
         assert_redirected_to(@wiki_page)
       end
 
-      should "render when given a nonexistent title" do
+      should "redirect when given a nonexistent title" do
         get show_or_new_wiki_pages_path, params: { title: "what" }
-        assert_response :success
+        assert_redirected_to wiki_page_path("what")
       end
     end