Generator template for Bootstrap _form with error display on each field

_form.html.slim

= form_for(@<%= singular_table_name %>, html: { class: "form-horizontal", role: "form" }) do |f|
  - if @<%= singular_table_name %>.errors.any?
    .alert.alert-danger.alert-dismissable role="alert"
      button.close type="button" data-dismiss="alert"
        span aria-hidden="true"
          | &times;
        span.sr-only
          | Close
      h4= "#{pluralize(@<%= singular_table_name %>.errors.count,"error")} prohibited this <%= singular_table_name %> from being saved:"
      ul
        - @<%= singular_table_name %>.errors.full_messages.each do |msg|
          li= msg
<%-  attributes.each do |attribute| -%>
  .form-group
    = f.label :<%= attribute.name %>, class: "col-sm-2 control-label"+ ((@<%=singular_table_name%>.errors[:<%=attribute.name%>])? "has-error":"")
    .col-sm-10
      = f.<%= attribute.field_type %> :<%= attribute.name %>, class: "form-control"
      - if (@<%=singular_table_name%>.errors[:<%=attribute.name%>])

        ul.errors.list-unstyled
          - @<%=singular_table_name%>.errors[:<%=attribute.name%>].each do |error|
            li.error.text-danger =" <%= attribute.name.humanize %> #{error}"


<%- end -%>
  .form-group
    .col-sm-offset-2.col-sm-10
      = f.submit class: "btn btn-primary"