How to make db dumpfile in django

You just use it like that:

./manage.py dumpdata > data_dump.json

After that action, there will be data_dump.json file in the directory in which you executed that command.

There are multiple options coming with that, but you probably already know it. The thing you need to know is how to redirect output from standard output into some file: you perform that action by putting > before file name.

To append something to the file you would use >>, but since you are dumping the data from Django and the output is most likely JSON, you will not want that (because it will make JSON invalid).

As it is mention in the docs, in order to dump large datasets you can avoid the sections causing problems, and treat them separately.

The following command does generally work:

python manage.py dumpdata --exclude auth.permission --exclude contenttypes > db.json

python manage.py loaddata db.json

In case you can export later the excluded data:

python manage.py dumpdata auth.permission > auth.json

python manage.py loaddata auth.json

You can choose a file to put the output of dumpdata into if you call it from within Python using call_command, for example:

from django.core.management import call_command

output = open(output_filename,'w') # Point stdout at a file for dumping data to.
call_command('dumpdata','model_name',format='json',indent=3,stdout=output)
output.close()

However, if you try calling this from the command line with e.g. --stdout=filename.json at the end of your dumpdata command, it gives the error manage.py: error: no such option: --stdout.

So it is there, you just have to call it within a Python script rather than on the command line. If you want it as a command line option, then redirection (as others have suggested) is your best bet.