Django imagekit和动态路径

Question

我正在使用imagekit提供的imagekit

因此，我定义了两个类模型：

class Photo(models.Model):
    #photo_wrapper = models.ForeignKey(PhotoWrapper, blank=True, null=True)
    original_image = models.ImageField(upload_to='static/photos')
    thumbnail = ImageSpec([Adjust(contrast=1.2, sharpness=1.1),
            resize.Crop(50, 50)], image_field='original_image',
            format='JPEG', quality=90)
    num_views = models.PositiveIntegerField(editable=False, default=0)

    class IKOptions:
        # This inner class is where we define the ImageKit options for the model
        spec_module = 'myspecs.specs'
        cache_dir = 'static/photos'
        image_field = 'original_image'
        save_count_as = 'num_views'

class Country(models.Model):       
    country_name = models.CharField(max_length=250)        
    country_photo = models.ForeignKey(Photo, blank=True, null=True)

    def __unicode__(self):
            return '%s' % self.country_name 

问题是每一张照片都是在“静态/照片”路径中创建的。我的目的是保存图像和缩略图，以及基于国家名称的动态路径。

例如，对于国家/地区“阿根廷”，动态路径将是“静态/照片/阿根廷/”

我如何才能做到这一点？

Answer 1

看起来你混合了两个不同版本的ImageKit。较新的版本(1.0+)不再使用内部IKOptions类，因此所有这些都被忽略了。(还删除了save_count_as功能。)

如果您想控制缓存文件名，ImageSpec构造函数将接受一个cache_to kwarg，它可以像ImageField的upload_to-can一样被调用。

Specifies the filename to use when saving the image
cache file. This is modeled after ImageField's ``upload_to`` and
can be either a string (that specifies a directory) or a
callable (that returns a filepath). Callable values should
accept the following arguments:

    - instance -- The model instance this spec belongs to
    - path -- The path of the original image
    - specname -- the property name that the spec is bound to on
        the model instance
    - extension -- A recommended extension. If the format of the
        spec is set explicitly, this suggestion will be
        based on that format. if not, the extension of the
        original file will be passed. You do not have to use
        this extension, it's only a recommendation.

因此，您只需创建一个接受这些参数并返回所需路径的函数，并在模型中使用该路径，如下所示：

class Photo(models.Model):
    thumbnail = ImageSpec(..., cache_to=my_cache_to_function)