Klaus V2.0

app/views/lessons/_form.html.slim

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+div.well
+  = bootstrap_form_for(@lesson) do |f|
+    = f.text_field :name
+    = f.text_field :short_name
+
+    = f.submit

app/views/lessons/edit.html.slim

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+- content_for :page_header
+  | Fach - #{@lesson.name}
+
+= render 'form'

app/views/lessons/index.html.erb

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+<% content_for :page_header do %>
+Fach - Index
+<% end %>
+<%= grid(@lessons_grid, upper_pagination_panel: true) do |g|
+    g.blank_slate content_tag(:div, "No records found", class: 'well')
+    g.column name: 'ID', attribute: 'id'
+    g.column name: 'Name', attribute: 'short_name'
+    g.column name: 'Name', attribute: 'name'
+
+    g.column do |lesson|
+      contant = content_tag(:div, class: 'btn-group') do
+        link = ''.html_safe
+        link.concat btn_link_to('Edit', edit_lesson_path(lesson), class: 'btn-xs btn-warning') if user_signed_in?
+        link.concat btn_link_to('Delete', lesson_path(lesson), method: "delete", :data => { confirm: 'Are you sure?' }, class: 'btn-xs btn-danger') if user_signed_in?
+        link
+      end
+    end
+  end
+%>

app/views/lessons/new.html.slim

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+- content_for :page_header
+  | Neues Fach
+
+= render 'form'