poder subir varias imagenes

app/models/post.rb

@@ -205,8 +205,15 @@ class Post
         if t.image?
           begin
             i = Post::ImageUploader.new(site)
-            i.store! v.tempfile
-            v = i.url
+            if t.multiple?
+              v = v.map do |tmp|
+                i.store! tmp.tempfile
+                i.url
+              end
+            else
+              i.store! v.tempfile
+              v = i.url
+            end
           rescue CarrierWave::IntegrityError => e
             v = e.message
           end
@@ -234,7 +241,7 @@ class Post
     template_fields.each do |tf|
       # TODO descubrir de mejor forma que el archivo no es del formato
       # correcto
-      if tf.image? && get_front_matter(tf.key).split('/').to_a.count <= 1
+      if tf.image? && [get_front_matter(tf.key)].flatten.map { |i| i.split('/').to_a.count <= 1 }.any?
         add_error validate: get_front_matter(tf.key)
       end
     end

app/models/post/template_field.rb

@@ -131,7 +131,7 @@ class Post
     end
 
     def image?
-      value == 'image'
+      array? ? value.first == 'image' : value == 'image'
     end
 
     # Si la plantilla es simple no está admitiendo Hashes como valores

app/views/posts/template_field/_image.haml

@@ -1,5 +1,8 @@
 - if @post.url? name
   %img.img-fluid{src: @site.get_url_for_sutty(@post.get_front_matter(name))}
+- name = [name,''] if template.multiple?
 = file_field_tag field_name_for_post_as_string(name),
   class: 'form-control',
-  required: template.required?
+  required: template.required?,
+  multiple: template.multiple?,
+  accept: 'image/*'