["python","django","django-models"]
Django - how to create a file and save it to a model's FileField?

Here's my model. What I want to do is generate a new file and overwrite the existing one whenever a model instance is saved: class Kitten(models.Model): claw_size = ... license_file = models.FileField(blank=True, upload_to='license') def save(self, *args, **kwargs): #Generate a new license file overwriting any previous version #and update file path self.license_file = ??? super(Request,self).save(*args, **kwargs) I see lots of documentation about how to upload a file. But how do I generate a file, assign it to a model field and have Django store it in the right place?
You want to have a look at FileField and FieldFile in the Django docs, and especially FieldFile.save(). Basically, a field declared as a FileField, when accessed, gives you an instance of class FieldFile, which gives you several methods to interact with the underlying file. So, what you need to do is: self.license_file.save(new_name, new_contents) where new_name is the filename you wish assigned and new_contents is the content of the file. Note that new_contents must be an instance of either django.core.files.File or django.core.files.base.ContentFile (see given links to manual for the details). The two choices boil down to: from django.core.files.base import ContentFile, File # Using File with open('/path/to/file') as f: self.license_file.save(new_name, File(f)) # Using ContentFile self.license_file.save(new_name, ContentFile('A string with the file content'))