Improving select

app/controllers/importers_controller.rb

@@ -49,8 +49,22 @@ def form_map_columns
     @importer = Importer.find(params[:id])
     columns = FatFreeCRM::ImportHandle.get_columns(@importer.attachment.path)
 
+    attributes = []
+
+    object = @importer.entity_class
+    _attrs = object.attribute_names - ['id']
+
+    _attrs.each do |attr|
+      attributes.push(
+          {
+              name: attr,
+              required: object.validators_on(attr).any? { |v| v.kind_of? ActiveModel::Validations::PresenceValidator }
+          }
+      )
+    end
+
     respond_to do |format|
-      format.html { render "form_map_columns", :locals => {columns: columns} }
+      format.html { render "form_map_columns", :locals => {columns: columns, attributes: attributes} }
     end
   end
 

app/models/polymorphic/importer.rb

@@ -43,5 +43,9 @@ def get_messages()
     JSON.parse(messages)
   end
 
+  def entity_class
+    self.entity_type.capitalize.constantize
+  end
+
   ActiveSupport.run_load_hooks(:fat_free_crm_importer, self)
 end

app/views/importers/form_map_columns.html.haml

@@ -5,12 +5,21 @@
 
   %div
     %table
-      - @importer.entity_attrs.each do |attr|
+      - attributes.each do |attr|
         %tr
           %td
-            .label #{ attr }
+            .label
+              #{ attr[:name] }
+              - if attr[:required]
+                %span.warn *
           %td
-            = select_tag "map[#{ attr }]", options_for_select(columns), class: 'select2', :include_blank => true, id: "map_#{ attr }"
+            = select_tag "map[#{ attr[:name] }]",
+            options_for_select(columns),
+            class: 'select2',
+            include_blank: true,
+            data: {placeholder: t(:select_blank)},
+            required: attr[:required],
+            id: "map_#{ attr[:name] }"
 
   .buttonbar
     = f.submit t(:save)

config/locales/fat_free_crm.en-US.yml

@@ -948,5 +948,5 @@ en-US:
   upload_file: Upload file
   save: Save
   importer_description: Upload excel file to import its content to the databases. Only valid excel files are allowed.
-  map_columns_description: Link the excel column that corresponds to each attribute or leave it blank.
+  map_columns_description: Link the excel column that corresponds to each attribute or leave it blank. The elements with * must have a value in the column that is selected.
   importer_status_label: Status

config/locales/fat_free_crm.es.yml

@@ -926,5 +926,5 @@ es:
   upload_file: Subir fichero
   save: Guardar
   importer_description: Subir fichero excel para importar su contenido a las base de datos. Solo se admiten fichero excel validos.
-  map_columns_description: Enlazar la columna del excel que le corresponde a cada atributo o dejar en blanco.
+  map_columns_description: Enlazar la columna del excel que le corresponde a cada atributo o dejar en blanco. Los elementos con * tienen que tener valor en la columna que se seleccione.
   importer_status_label: Estado