Question

class Category(Model):
    name = models.CharField(max_length=45)

class Animal(Model):
    name = models.CharField(max_length=45)
    categories = models.ManyToManyField(Category)

@receiver(pre_save, sender=Animal)
def animal_create_update(sender, **kwargs):
    # get the selected categories and do something
    print(categories)

我试图找到一种在pre_save信号期间访问类别的方法。可能吗？

Answer 1

你可以尝试

/*
  usage: @include transition(prop1, prop2, ..., 0.5s cubic-bezier(0.16, 0.85, 0.45, 1));
*/
@mixin transition($args...) {
  $type: nth($args, length($args));
  $props: remove-nth($args, length($args));
  $result: ();

  @for $i from 1 through length($props) {
    $prop: nth($props, $i);
    $result: append($result, $prop);
    $result: append($result, $type);
    @if $i != length($props) {
      $result: append($result, unquote($string: ","));
    }
  }

  @include simple_transition($result);
}

让我知道

Django pre_save many_to_many关系

1 个答案: