fix filtering by tag

Author: drusepth

app/controllers/content_controller.rb

@@ -40,8 +40,8 @@ def index
       page_type: @content_type_class.name,
       page_id:   @content.pluck(:id)
     ).order(:tag)
-    if params.key?(:tag)
-      @filtered_page_tags = @page_tags.where(slug: params[:tag])
+    if params.key?(:slug)
+      @filtered_page_tags = @page_tags.where(slug: params[:slug])
       @content.select! { |content| @filtered_page_tags.pluck(:page_id).include?(content.id) }
     end
     @page_tags = @page_tags.uniq(&:tag)

app/views/content/components/_list_filter_bar.html.erb

@@ -60,7 +60,7 @@
     </a>
     <ul id='tag-filter-dropdown' class='dropdown-content'>
       <li>
-        <%= link_to params.permit(:tag, :favorite_only).merge({ tag: nil }), class: "#{content_type.text_color}" do %>
+        <%= link_to params.permit(:tag, :favorite_only).merge({ slug: nil }), class: content_type.text_color do %>
           <i class="material-icons"><%= PageTag.icon %></i>
           All <%= content_type.name.downcase.pluralize %>
         <% end %>
@@ -69,7 +69,7 @@
       <% if @page_tags %>
         <% @page_tags.each do |page_tag| %>
           <li>
-            <%= link_to params.permit(:tag, :favorite_only).merge({ tag: PageTagService.slug_for(page_tag.tag) }), class: "#{content_type.text_color}" do %>
+            <%= link_to params.permit(:tag, :favorite_only).merge({ slug: PageTagService.slug_for(page_tag.tag) }), class: content_type.text_color do %>
               <i class="material-icons"><%= PageTag.icon %></i>
               <small class="grey-text">tagged</small>
               <%= page_tag.tag %>