Admin category edit/update action

app/controllers/admin/categories_controller.rb

@@ -22,6 +22,17 @@ class Admin::CategoriesController < Admin::ApplicationController
     end
   end
 
+  def edit
+  end
+
+  def update
+    if @category.update_attributes category_params
+      redirect_to admin_category_path(@category)
+    else
+      render :edit
+    end
+  end
+
   private
 
   def category_params

app/views/admin/categories/edit.html.slim

@@ -0,0 +1,22 @@
+ol.breadcrumb
+  li
+    a href=admin_categories_path Categories
+  li
+    a href=admin_category_path(@category) = @category.name
+  li.active Edit
+
+.row
+  .col-md-9
+    .panel
+      .panel-body
+        = form_for @category, url: admin_category_path(@category) do |f|
+          .form-group
+            = f.label :name
+            = f.text_field :name, class: 'form-control'
+          .form-group
+            = f.label :slug
+            = f.text_field :slug, class: 'form-control'
+          .form-group
+            = f.label :description
+            = markdown_area f, :description
+          = f.submit 'Save changes', class: 'btn btn-success'

app/views/admin/categories/show.html.slim

@@ -6,7 +6,7 @@ ol.breadcrumb
 
 .row
   .col-md-9
-    .panel
+    .panel.panel-campo
       .panel-body
         dl
           dt Name
@@ -17,3 +17,7 @@ ol.breadcrumb
           dd = @category.description
           dt Topics count
           dd = @category.topics_count
+  .col-md-3
+    .panel.panel-campo
+      .panel-body
+        a.btn.btn-default.btn-block href=edit_admin_category_path(@category) Edit

test/controllers/admin/categories_controller_test.rb

@@ -26,4 +26,15 @@ class Admin::CategoriesControllerTest < ActionController::TestCase
       post :create, category: attributes_for(:category)
     end
   end
+
+  test "should edit category" do
+    get :edit, id: create(:category)
+    assert_response :success, @response.body
+  end
+
+  test "should update category" do
+    category = create(:category)
+    patch :update, id: category, category: { name: 'change' }
+    assert_equal 'change', category.reload.name
+  end
 end