django upload file using JSON - json

Question

i have JSON request like this:
object: { "fields":{ "src" : "http://dss.com/a.jpg", "data" : " //file is here" } }
i have the model like this:
class FileMy(models.Model):
f = models.FileField(upload_to='file_path/',)
How to save the file ?

Answer 1

You may use urllib to read the file and then you can add it to your model.
Take a look at this post:
Django: add image in an ImageField from image url

Answer 2

You may be able to wrap the data in a ContentFile which inherits from File and then save the file to the model directly.
from __future__ import unicode_literals
from django.core.files.base import ContentFile
from .models import FileMy
f1 = ContentFile("esta sentencia está en español")
f2 = ContentFile(b"these are bytes")
m1 = FileMy()
m2 = FileMy()
m1.f.save("filename", f1, save=True)
m2.f.save("filename", f2, save=True)

Answer 3

First of all, encode the raw data in the json request body.
from tempfile import NamedTemporaryFile
from django.core.files import File
def save_file_to_field(field, file_name, raw_content):
# field: reference to the model object instance field
img_temp = NamedTemporaryFile(delete=True)
img_temp.write(raw_content)
field.save(
file_name,
File(img_temp)
)
img_temp.flush()
What does this do:
creates a temporary file on your system that holds the data
uses the file field save method to trigger the usual file handling
deletes the temporary file