Using height_field and width_field attribute in ImageField of Django

Question

I have a model

class Anh_chi_tiet(models.Model):
    du_an       = models.ForeignKey(Du_an)
    title       = models.CharField(max_length=120)
    url         =         


        

Answer 1

I think you are misunderstanding what the height_field and width_field attributes are for.

The height_field isn't used to change the height. It's used to record what the height already is.

This way you can do something like

without having to read the file.

If you are trying to resize all images uploaded via an ImageField, check here: Image resizing with django?