CODEWITHSUNDEEP
pythondjango
GEV
GEV

Reputation: 467

Django dumpdata fails on special characters

I'm trying to dump my entire DB to a json. When I run python manage.py dumpdata > data.json I get an error:

(env) PS C:\dev\watch_something> python manage.py dumpdata > data.json
CommandError: Unable to serialize database: 'charmap' codec can't encode character '\u0130' in position 1: character maps to <undefined>
Exception ignored in: <generator object cursor_iter at 0x0460C140>
Traceback (most recent call last):
  File "C:\dev\watch_something\env\lib\site-packages\django\db\models\sql\compiler.py", line 1602, in cursor_iter
    cursor.close()
sqlite3.ProgrammingError: Cannot operate on a closed database.

It's because one of the characters in my DB is a sepcial character. How can I dump the DB correctly?

FYI, all other DB functionalities work fine

Upvotes: 24

Views: 12076

Answers (6)

Diggory
Diggory

Reputation: 1

I think this is the current best way: In the directory Python311\Lib\site-packages\django\core\serializers, you open the json.py file. In the json.py file, find the section:

class Serializer(PythonSerializer):  
           .................  
           def _init_options(self):  
                  .............  
                  # Default is False  
                  self.json_kwargs.setdefault("ensure_ascii", False)  
                  # You fix False to True  
                  self.json_kwargs.setdefault("ensure_ascii", True)

Upvotes: 0

Codertjay
Codertjay

Reputation: 1007

On windows the way i solved mine was Add to your settings

import _locale
_locale._getdefaultlocale = (lambda *args: ['en_US', 'utf8'])

run this on shell only on windows

python -Xutf8 manage.py dumpdata --exclude auth.permission --exclude contenttypes > db.json

I actually did this it worked

python -Xutf8 manage.py dumpdata -o data.json

But wasnt showing data from my installed apps

Upvotes: 1

Wertartem
Wertartem

Reputation: 237

Here is the solution from djangoproject.com
You go to Settings there's a "Use Unicode UTF-8 for worldwide language support", box in "Language" - "Administrative Language Settings" - "Change system locale" - "Region Settings". If we apply that, and reboot, then we get a sensible, modern, default encoding from Python. djangoproject.com

the settings box looks like this. Enable the check and restart your system Windows settings

Upvotes: 4

Julien Palard
Julien Palard

Reputation: 11566

One solution is to use ./manage.py dumpdata -o data.json instead of ./manage.py dumpdata > data.json.

Another solution is to use Python's UTF-8 mode, run:

python -Xutf8 ./manage.py dumpdata > data.json

Upvotes: 92

balabanas
balabanas

Reputation: 1

If you have multiple Python environments, before applying workarounds, it's worth checking that you issue python manage.py against the correct environment. That was my case where I met the same error: the database was created under containerized environment on Linux, with a higher Python version, but Django and other packages were present also in the legacy local environment on Windows. As well, the project directory was attached to the container as a volume, and the content was identical locally and in the container. So, I just mix up and ran manage.py locally instead of being attached to the container.

Upvotes: 0

n3vermind
n3vermind

Reputation: 296

To save json data in django the TextIOWrapper is used:

The default encoding is now locale.getpreferredencoding(False) (...)

In documentation of locale.getpreferredencoding fuction we can read:

Return the encoding used for text data, according to user preferences. User preferences are expressed differently on different systems, and might not be available programmatically on some systems, so this function only returns a guess.

Here I found "hacky" but working method to overwrite these settings:

In file settings.py of your django project add these lines:

import _locale
_locale._getdefaultlocale = (lambda *args: ['en_US', 'utf8'])

Upvotes: 9

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