Dynamic upload_to

There are two fields in Django that take upload_to parameter. With this parameter, you can define to which folder your files will be persisted.

There are different ways of saving a file to disk. I’m talking about the naming of the files.

You may want to save the files under the name they were uploaded. Here, for example, I just want to put them inside brand_logos folder in my server, I don’t want to change the names of the incoming images.

from djongo.storage import GridFSStorage
grid_fs_storage = GridFSStorage(collection='myfiles')

class Brand(models.Model):
    name = models.CharField(
        max_length=128, blank=False, null=False, unique=True
    )
    logo = models.ImageField(upload_to="brand_logos", blank=True, null=True)

Moreover, ables could be partitioned so that each sub-directory of a path was mapped to specific data values. For example, each day’s worth of data for a given table would be in a single sub-directory. Then you need to write a specific function like the below. This function categorizes each day’s file by date inside the myfiles folder.

def upload_to(instance, filename):
    date = datetime.now().strftime('%Y%m%d')
    filename = "myfiles" + "/" + date + "/" + filename
    return filename


class Brand(models.Model):
    name = models.CharField(
        max_length=128, blank=False, null=False, unique=True
    )
    logo = models.ImageField(upload_to=upload_to, blank=True, null=True)

See you in the next article 🙂