@import "bootstrap-sprockets";
@import "bootstrap";
@import "select2";
@import "select2-bootstrap";
@import "bootstrap-datepicker3";

.field_with_errors {
  @extend .has-error;

  .form-control {
    border: 1px;
  }
}

@import "bootstrap-sprockets";
@import "bootstrap";
@import "select2";
@import "select2-bootstrap";
@import "bootstrap-datepicker3";

.field_with_errors {
  @extend .has-error;

  .form-control {
    border-width: 1px;
  }
}

Correct border property for errors
Correct border property for errors
