crear una tabla para los valores anidados

y secar un poco!

app/helpers/application_helper.rb

@@ -1,2 +1,21 @@
 module ApplicationHelper
+  # Devuelve el atributo name de un campo posiblemente anidado
+  def field_name_for_post(names)
+    return ['post', names] if names.is_a? String
+
+    names = names.dup
+    root = 'post'
+    name = names.pop
+    names.each do |n|
+      root = "#{root}[#{n}]"
+    end
+
+    [root, name]
+  end
+
+  def field_name_for_post_as_string(names)
+    f = field_name_for_post(names)
+
+    "#{f.first}[#{f.last}]"
+  end
 end

app/models/post/template_field.rb

@@ -25,6 +25,8 @@ class Post
         @type = 'text'
       when string? && contents.split('/', 2).count == 2
         @type = 'select'
+      when nested?
+        @type = 'table'
       when array?
         @type = 'select'
       when boolean?
@@ -88,7 +90,7 @@ class Post
 
     # Detecta si el valor es una tabla de campos
     def nested?
-      value.is_a? Hash
+      value.is_a?(Hash) || (array? && value.first.is_a?(Hash))
     end
 
     # Un campo acepta valores abiertos si no es un array con múltiples
@@ -129,7 +131,18 @@ class Post
     end
 
     def help
-      complex? && contents.dig('help')
+      (complex? && contents.dig('help')) || human
+    end
+
+    def nested_fields
+      return unless nested?
+
+      v = value
+      v = value.first if array?
+
+      @nested_fields ||= v.map do |k,sv|
+        Post::TemplateField.new post, k, sv
+      end
     end
 
     # Obtiene los valores posibles para el campo de la plantilla

app/views/posts/_form.haml

@@ -78,32 +78,12 @@
   - @post.template_fields.each do |template|
     - next unless type = template.type
     .form-group
-      = label_tag "post_#{template}" do
+      = label_tag "post_#{template}", id: template do
         - if template.private?
           = fa_icon 'lock', title: t('posts.private')
-        = template.help.present? ? template.help : template.human
+        = template.help
-      - name = "post[#{template}]"
       - value = @post.new? ? template.values : @post.get_front_matter(template)
-      - case type
+      = render "posts/template_field/#{type}", template: template, name: template.key, value: value
-      - when 'text'
-        = text_field 'post', template,
-          value: value,
-          class: 'form-control',
-          required: template.required?
-      - when 'text_area'
-        = text_area_tag name, value, class: 'form-control', required: template.required?
-      - when 'check_box'
-        = hidden_field 'post', template, value: 'false'
-        = check_box_tag name, 'true', value == 'true', class: 'form-control'
-      - when 'select'
-        = select_tag name, options_for_select(template.values, @post.get_front_matter(template)),
-          { class: 'form-control select2',
-          multiple: template.multiple?,
-          required: template.required?,
-          data: { tags: template.open?,
-          placeholder: t('posts.select.placeholder')}}
-        - if template.open?
-          %small.text-muted.form-text= t('posts.open')
       .invalid-feedback= t('posts.invalid')
   .form-group
     = submit_tag t('posts.save'), class: 'btn btn-success', id: 'submit-post'

app/views/posts/template_field/_check_box.haml

@@ -0,0 +1,6 @@
+- root, field_name = field_name_for_post(name)
+= hidden_field root, field_name, value: 'false'
+= check_box_tag field_name_for_post_as_string(name),
+  'true',
+  value == 'true',
+  class: 'form-control'

app/views/posts/template_field/_select.haml

@@ -0,0 +1,9 @@
+= select_tag field_name_for_post_as_string(name),
+  options_for_select(template.values, @post.get_front_matter(template)),
+  { class: 'form-control select2',
+  multiple: template.multiple?,
+  required: template.required?,
+  data: { tags: template.open?,
+  placeholder: t('posts.select.placeholder')}}
+- if template.open?
+  %small.text-muted.form-text= t('posts.open')

app/views/posts/template_field/_table.haml

@@ -0,0 +1,15 @@
+- template = local_assigns[:template]
+%table.table.table-condensed.table-striped
+  %thead
+    %tr
+      - template.nested_fields.each do |nf|
+        %td= nf.help || nf.human
+  %tbody
+    %tr
+      - template.nested_fields.each do |nf|
+        - value = @post.new? ? nf.values : @post.get_front_matter(template)[nf]
+        %td= render "posts/template_field/#{nf.type}",
+          template: nf,
+          name: [template.key, nf.key],
+          value: value
+      %td= fa_icon 'close', title: 'Eliminar'

app/views/posts/template_field/_text.haml

@@ -0,0 +1,7 @@
+-# Si el campo está anidado, la raíz del atributo name tiene que
+-# contener los demás elementos del template superior
+- root, field_name = field_name_for_post(name)
+= text_field root, field_name,
+  value: local_assigns[:value],
+  class: 'form-control',
+  required: template.required?

app/views/posts/template_field/_text_area.haml

@@ -0,0 +1,2 @@
+= text_area_tag field_name_for_post_as_string(name), value,
+  class: 'form-control', required: template.required?