如何为FileField Django查找图像的高度和宽度 [英] how to find height and width of image for FileField Django

问题描述

如果我们的模型定义如下，如何查找图像的高度和宽度

How to find height and width of image if our model is defined as follow

class MModel:
 document = FileField()
 format_type = CharField()

并将图像保存在文档中，那么如果它是图像，我们如何找到文档的高度和宽度呢?

and image is saved in document then how we can find height and width of a document if it is image ?

推荐答案

如果文件始终是图像，请将FileField更改为

If the files will always be images, change FileField to ImageField, like this:

def MyModel(models.Model):
  height = models.IntegerField()
  width = models.IntegerField()
  document = models.ImageField(height_field='height', width_field='width')

否则，您将必须手动计算图像的宽度和高度:

Otherwise, you'll have to manually calculate the image width and height:

from django.core.files.images import get_image_dimensions

obj = MModel.objects.get(pk=1)
width, height = get_image_dimensions(obj.document.file)

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