TypeError: name must be an instance of str

[obaidullahzaland]

I am using the following libraries asgiref==3.3.4 Django==3.2.4 django-cors-headers==3.7.0 djangorestframework==3.12.4 djongo==1.3.6 pymongo==3.11.4 pytz==2021.1 sqlparse==0.2.4

My models.py looks like

from django.db import models

Create your models here.

class Tutorial(models.Model): title = models.CharField(max_length=70, blank=True, default='') description = models.CharField(max_length=200, blank=True, default='') published = models.BooleanField(default=True)

I have also updated the required settings in the SETTINGS,PY file to use Djongo as my backed but when I use the following command python manage.py makemigrations, it throws the following error..

(djangomongo) D:\django_practice\DjangoMongoAngular\DjangoRestAPIMongoDB>python manage.py makemigrations Traceback (most recent call last): File "D:\django_practice\DjangoMongoAngular\DjangoRestAPIMongoDB\manage.py", line 22, in main() File "D:\django_practice\DjangoMongoAngular\DjangoRestAPIMongoDB\manage.py", line 18, in main execute_from_command_line(sys.argv) File "D:\django_practice\DjangoMongoAngular\djangomongo\lib\site-packages\django\core\management__init.py", line 419, in execute_from_command_line utility.execute() File "D:\django_practice\DjangoMongoAngular\djangomongo\lib\site-packages\django\core\management__init.py", line 413, in execute
self.fetch_command(subcommand).run_from_argv(self.argv) File "D:\django_practice\DjangoMongoAngular\djangomongo\lib\site-packages\django\core\management\base.py", line 354, in run_from_argv
self.execute(*args, cmd_options) File "D:\django_practice\DjangoMongoAngular\djangomongo\lib\site-packages\django\core\management\base.py", line 398, in execute output = self.handle(*args, *options) File "D:\django_practice\DjangoMongoAngular\djangomongo\lib\site-packages\django\core\management\base.py", line 89, in wrapped res = handle_func(args, kwargs) File "D:\django_practice\DjangoMongoAngular\djangomongo\lib\site-packages\django\core\management\commands\makemigrations.py", line 103, in handle loader.check_consistent_history(connection) File "D:\django_practice\DjangoMongoAngular\djangomongo\lib\site-packages\django\db\migrations\loader.py", line 294, in check_consistent_history applied = recorder.applied_migrations() File "D:\django_practice\DjangoMongoAngular\djangomongo\lib\site-packages\django\db\migrations\recorder.py", line 77, in applied_migrations if self.has_table(): File "D:\django_practice\DjangoMongoAngular\djangomongo\lib\site-packages\django\db\migrations\recorder.py", line 55, in has_table with self.connection.cursor() as cursor: File "D:\django_practice\DjangoMongoAngular\djangomongo\lib\site-packages\django\utils\asyncio.py", line 26, in inner return func(*args, kwargs) File "D:\django_practice\DjangoMongoAngular\djangomongo\lib\site-packages\django\db\backends\base\base.py", line 259, in cursor return self._cursor() File "D:\django_practice\DjangoMongoAngular\djangomongo\lib\site-packages\django\db\backends\base\base.py", line 235, in _cursor self.ensure_connection() File "D:\django_practice\DjangoMongoAngular\djangomongo\lib\site-packages\django\utils\asyncio.py", line 26, in inner return func(*args, *kwargs) File "D:\django_practice\DjangoMongoAngular\djangomongo\lib\site-packages\django\db\backends\base\base.py", line 219, in ensure_connection self.connect() File "D:\django_practice\DjangoMongoAngular\djangomongo\lib\site-packages\django\utils\asyncio.py", line 26, in inner return func(args, kwargs) File "D:\django_practice\DjangoMongoAngular\djangomongo\lib\site-packages\django\db\backends\base\base.py", line 200, in connect self.connection = self.get_new_connection(conn_params) File "D:\django_practice\DjangoMongoAngular\djangomongo\lib\site-packages\djongo\base.py", line 179, in get_new_connection database = self.client_connection[name] File "D:\django_practice\DjangoMongoAngular\djangomongo\lib\site-packages\pymongo\mongo_client.py", line 1569, in getitem__ return database.Database(self, name) File "D:\django_practice\DjangoMongoAngular\djangomongo\lib\site-packages\pymongo\database.py", line 107, in init__ raise TypeError("name must be an instance " TypeError: name must be an instance of str

[shreyanshu7101904]

Hi @ @obaidullahzaland use djongo models to create your models class

[kasir-barati]

Faced the same problem.

settings.py

"""
Django settings for anime_die_heart project.

Generated by 'django-admin startproject' using Django 4.0.5.

For more information on this file, see
https://docs.djangoproject.com/en/4.0/topics/settings/

For the full list of settings and their values, see
https://docs.djangoproject.com/en/4.0/ref/settings/
"""
from pathlib import Path
import os
from django.core.exceptions import ImproperlyConfigured
from shared.read_env import read_env_files

# Build paths inside the project like this: BASE_DIR / 'subdir'.
BASE_DIR = Path(__file__).resolve().parent.parent
BASE_URL = 'http://localhost:8000/'

# Quick-start development settings - unsuitable for production
# See https://docs.djangoproject.com/en/4.0/howto/deployment/checklist/

# SECURITY WARNING: keep the secret key used in production secret!
SECRET_KEY = 'django-insecure-77hptzt_iz9g#0(5jxv&f%+@klssg@si()%3w)3#x@$$g$9n^u'

# SECURITY WARNING: don't run with debug turned on in production!
DEBUG = True

ALLOWED_HOSTS = []

def get_env_value(env_variable):
    try:
        path = os.path.join(os.getcwd(), '.mongodb.env')
        env_value = read_env_files([path])[env_variable]
        return env_value
    except KeyError:
        error_msg = f'Set the {env_variable} environment variable'
        raise ImproperlyConfigured(error_msg)

# Application definition

INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'rest_framework',
    'watch_list_app'
]

MIDDLEWARE = [
    'django.middleware.security.SecurityMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.common.CommonMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
]

ROOT_URLCONF = 'anime_die_heart.urls'

TEMPLATES = [
    {
        'BACKEND': 'django.template.backends.django.DjangoTemplates',
        'DIRS': [],
        'APP_DIRS': True,
        'OPTIONS': {
            'context_processors': [
                'django.template.context_processors.debug',
                'django.template.context_processors.request',
                'django.contrib.auth.context_processors.auth',
                'django.contrib.messages.context_processors.messages',
            ],
        },
    },
]

WSGI_APPLICATION = 'anime_die_heart.wsgi.application'

# Database
# https://docs.djangoproject.com/en/4.0/ref/settings/#databases

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.sqlite3',
        'NAME': BASE_DIR / 'db.sqlite3',
    },
    'mongodb': {
        'ENGINE': 'djongo',
        'NAME': get_env_value('MONGODB_DATABASE'),
        'CLIENT': {
            'host': 'localhost',
            'port': 27017,
            'username': get_env_value('MONGODB_USERNAME'),
            'password': get_env_value('MONGODB_PASSWORD'),
            'authSource': 'admin',
            'authMechanism': 'SCRAM-SHA-1'
        } 
    }
}

DEFAULT_FILE_STORAGE = 'mongo_storage.storage.GridFSStorage'
GRIDFS_DATABASE = 'anime_videos'
UPLOADED_FILES_USE_URL = True

# Password validation
# https://docs.djangoproject.com/en/4.0/ref/settings/#auth-password-validators

AUTH_PASSWORD_VALIDATORS = [
    {
        'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
    },
]

# Internationalization
# https://docs.djangoproject.com/en/4.0/topics/i18n/

LANGUAGE_CODE = 'en-us'

TIME_ZONE = 'UTC'

USE_I18N = True

USE_TZ = True

# Static files (CSS, JavaScript, Images)
# https://docs.djangoproject.com/en/4.0/howto/static-files/

STATIC_URL = 'static/'

# Default primary key field type
# https://docs.djangoproject.com/en/4.0/ref/settings/#default-auto-field

DEFAULT_AUTO_FIELD = 'django.db.models.BigAutoField'

models.py

from django.db import models
from django.db.models import FileField
from django.db.models.indexes import Index
from djongo.storage import GridFSStorage
from djongo import models as djongoModels
import anime_die_heart.settings as settings

grid_fs_storage = GridFSStorage(
    collection='myfiles', 
    base_url=''.join([settings.BASE_URL, 'myfiles/'])
)

# Create your models here.
class Movie(models.Model):
    name: str = models.CharField(max_length=100, null=False)
    description: str = models.CharField(max_length=400, null=False)
    active: bool = models.BooleanField(default=True)

    class Meta:
        db_table: str = 'movies'
        indexes: Index = [
            models.Index(fields=['name'], name='movie_name_index')
        ]

    def __str__(self):
        return self.name

class MovieFile(djongoModels.Model):
    file: FileField = models.FileField(upload_to='animes', storage=grid_fs_storage)

serializers.py

from rest_framework import serializers
from django.core.files import File
from rest_framework.serializers import FileField
from ..models import MovieFile

class MovieSerializer(serializers.Serializer):
    id: int = serializers.IntegerField(read_only=True, required=False)
    name: str = serializers.CharField(required=True)
    description: str = serializers.CharField(required=True)
    active: bool = serializers.BooleanField(required=False)

class UploadMovieSerializer(serializers.Serializer):
    file: File = serializers.FileField(required=True)

views.py

from rest_framework.exceptions import bad_request
from zoneinfo import ZoneInfo
from rest_framework import status
from django.core.files import File
import datetime
from rest_framework.response import Response
from rest_framework.decorators import api_view
from rest_framework.request import Request
from ..models import Movie
from ..models import MovieFile
from .serializers import MovieSerializer
from .serializers import UploadMovieSerializer

@api_view(["POST"])
def upload_movie(req: Request) -> Response:
    if 'file' not in req.FILES:
        return bad_request(req, 'Please select a file')

    serialized_movie = UploadMovieSerializer(data=req.data)
    """
    Wrong usage
    <MultiValueDict: {'file': [<InMemoryUploadedFile: Untitled.png (image/png)>]}>
    req.FILES.file
    """
    sent_file: File = req.FILES['file']
    MovieFile.objects.create(file=sent_file)
    # save_uploaded_file(sent_file)

    # Timezone is really a hard thing to deal. So I decided to keep it in zero timezone
    now = datetime.datetime.now(tz=ZoneInfo("Etc/GMT"))
    created_move = Movie.objects.create(
        name=sent_file.name,
        description=f"File uploaded at {now}",
        active=True
    )
    created_move.save()

    serialized_movie = MovieSerializer(created_move)
    return Response(
        serialized_movie.data, 
        status=status.HTTP_201_CREATED
    )

error

Traceback (most recent call last):
  File "/home/kasir/anime_die_heart/venv/lib/python3.10/site-packages/django/core/handlers/exception.py", line 55, in inner
    response = get_response(request)
  File "/home/kasir/anime_die_heart/venv/lib/python3.10/site-packages/django/core/handlers/base.py", line 197, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/home/kasir/anime_die_heart/venv/lib/python3.10/site-packages/django/views/decorators/csrf.py", line 54, in wrapped_view
    return view_func(*args, **kwargs)
  File "/home/kasir/anime_die_heart/venv/lib/python3.10/site-packages/django/views/generic/base.py", line 84, in view
    return self.dispatch(request, *args, **kwargs)
  File "/home/kasir/anime_die_heart/venv/lib/python3.10/site-packages/rest_framework/views.py", line 509, in dispatch
    response = self.handle_exception(exc)
  File "/home/kasir/anime_die_heart/venv/lib/python3.10/site-packages/rest_framework/views.py", line 469, in handle_exception
    self.raise_uncaught_exception(exc)
  File "/home/kasir/anime_die_heart/venv/lib/python3.10/site-packages/rest_framework/views.py", line 480, in raise_uncaught_exception
    raise exc
  File "/home/kasir/anime_die_heart/venv/lib/python3.10/site-packages/rest_framework/views.py", line 506, in dispatch
    response = handler(request, *args, **kwargs)
  File "/home/kasir/anime_die_heart/venv/lib/python3.10/site-packages/rest_framework/decorators.py", line 50, in handler
    return func(*args, **kwargs)
  File "/home/kasir/anime_die_heart/anime_die_heart/watch_list_app/api/views.py", line 62, in upload_movie
    MovieFile.objects.create(file=sent_file)
  File "/home/kasir/anime_die_heart/venv/lib/python3.10/site-packages/django/db/models/manager.py", line 85, in manager_method
    return getattr(self.get_queryset(), name)(*args, **kwargs)
  File "/home/kasir/anime_die_heart/venv/lib/python3.10/site-packages/django/db/models/query.py", line 514, in create
    obj.save(force_insert=True, using=self.db)
  File "/home/kasir/anime_die_heart/venv/lib/python3.10/site-packages/django/db/models/base.py", line 806, in save
    self.save_base(
  File "/home/kasir/anime_die_heart/venv/lib/python3.10/site-packages/django/db/models/base.py", line 857, in save_base
    updated = self._save_table(
  File "/home/kasir/anime_die_heart/venv/lib/python3.10/site-packages/django/db/models/base.py", line 1000, in _save_table
    results = self._do_insert(
  File "/home/kasir/anime_die_heart/venv/lib/python3.10/site-packages/django/db/models/base.py", line 1041, in _do_insert
    return manager._insert(
  File "/home/kasir/anime_die_heart/venv/lib/python3.10/site-packages/django/db/models/manager.py", line 85, in manager_method
    return getattr(self.get_queryset(), name)(*args, **kwargs)
  File "/home/kasir/anime_die_heart/venv/lib/python3.10/site-packages/django/db/models/query.py", line 1434, in _insert
    return query.get_compiler(using=using).execute_sql(returning_fields)
  File "/home/kasir/anime_die_heart/venv/lib/python3.10/site-packages/django/db/models/sql/compiler.py", line 1620, in execute_sql
    for sql, params in self.as_sql():
  File "/home/kasir/anime_die_heart/venv/lib/python3.10/site-packages/django/db/models/sql/compiler.py", line 1547, in as_sql
    value_rows = [
  File "/home/kasir/anime_die_heart/venv/lib/python3.10/site-packages/django/db/models/sql/compiler.py", line 1548, in <listcomp>
    [
  File "/home/kasir/anime_die_heart/venv/lib/python3.10/site-packages/django/db/models/sql/compiler.py", line 1549, in <listcomp>
    self.prepare_value(field, self.pre_save_val(field, obj))
  File "/home/kasir/anime_die_heart/venv/lib/python3.10/site-packages/django/db/models/sql/compiler.py", line 1497, in pre_save_val
    return field.pre_save(obj, add=True)
  File "/home/kasir/anime_die_heart/venv/lib/python3.10/site-packages/django/db/models/fields/files.py", line 316, in pre_save
    file.save(file.name, file.file, save=False)
  File "/home/kasir/anime_die_heart/venv/lib/python3.10/site-packages/django/db/models/fields/files.py", line 92, in save
    self.name = self.storage.save(name, content, max_length=self.field.max_length)
  File "/home/kasir/anime_die_heart/venv/lib/python3.10/site-packages/django/core/files/storage.py", line 56, in save
    name = self.get_available_name(name, max_length=max_length)
  File "/home/kasir/anime_die_heart/venv/lib/python3.10/site-packages/django/core/files/storage.py", line 96, in get_available_name
    while self.exists(name) or (max_length and len(name) > max_length):
  File "/home/kasir/anime_die_heart/venv/lib/python3.10/site-packages/djongo/storage.py", line 110, in exists
    gridfs, filename = self._get_gridfs(path)
  File "/home/kasir/anime_die_heart/venv/lib/python3.10/site-packages/djongo/storage.py", line 168, in _get_gridfs
    return GridFS(self._db, collection_name), filename
  File "/home/kasir/anime_die_heart/venv/lib/python3.10/site-packages/gridfs/__init__.py", line 80, in __init__
    raise TypeError("database must be an instance of Database")
TypeError: database must be an instance of Database
[01/Jul/2022 06:56:39] "POST /movies/upload HTTP/1.1" 500 187371

@shreyanshu7101904 @obaidullahzaland

Did you knwo what is wrong?

[kasir-barati]

@shreyanshu7101904 @obaidullahzaland

When I remove the "default" from settings.py it throw this error:

pymongo.errors.OperationFailure: Authentication failed., full error: {'ok': 0.0, 'errmsg': 'Authentication failed.', 'code': 18, 'codeName': 'AuthenticationFailed'}

I guess I do not understand how settings.py exactly works.

[kasir-barati]

Resolved. My bad

Please see here for a better understanding about why I was getting Authentication Failed: https://github.com/kasir-barati/docker/tree/docker-compose/docker-compose-files/mongodb