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‎.editorconfig‎

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root = true
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[*]
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charset = utf-8
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indent_style = space
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indent_size = 4
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[Makefile]
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indent_style = tab

‎.gitignore‎

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# Local
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[Ll]ocal
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*[._-][Ll]ocal
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!**/vimrc.local
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[Ll]ocal[._-]*
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*[._-][Ll]ocal[._-]*
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# Python
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__pycache__
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*.pyc
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.venv
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.eggs
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*.egg-info
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_version.py
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# Docker
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docker-compose.override.yml
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.env
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# Secrets
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secrets
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*.key
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# Javascript and front-end assets
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node_modules
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*.min.js
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*.min.css
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**/static/lib
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# Build, log or temporary assets
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*~
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~*
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*.tmp
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*.log
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tmp
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build
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dist
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.DS_Store
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# Editors
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.vscode
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.vs

‎README.md‎

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Import field with Django 5.0 db_default date
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============================================
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## How to reproduce
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Create Python environment:
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python -m venv .venv
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.\.venv\Scripts\activate
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pip install -r requirements.txt
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Create and deploy PostgreSql database:
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createdb -U postgres bugs
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python manage.py migrate
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Create super user:
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$env:DJANGO_SUPERUSER_PASSWORD = "admin"
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python manage.py createsuperuser --noinput --username admin --email [email protected]
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Run server:
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python manage.py runserver
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Go to [http://localhost:8000/admin/import_db_default/item/](http://localhost:8000/admin/import_db_default/item/),
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click `Import` and select `sample.csv`.
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## Error
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**AttributeError: 'DatabaseDefault' object has no attribute 'utcoffset'**
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My environment:
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- Windows 10 22H2 (build 19045.3930)
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- Python 3.11.5
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- PostgreSQL 15.4
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- Django 5.0.1
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- Psycopg 3.1.17
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- Django-import-export 3.3.6
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Error traceback:
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Traceback (most recent call last):
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File "…\import-db-default\.venv\Lib\site-packages\import_export\resources.py", line 785, in import_row
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diff = self.get_diff_class()(self, original, new)
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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File "…\import-db-default\.venv\Lib\site-packages\import_export\resources.py", line 259, in __init__
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self.left = self._export_resource_fields(resource, instance)
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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File "…\import-db-default\.venv\Lib\site-packages\import_export\resources.py", line 280, in _export_resource_fields
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return [
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^
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File "…\import-db-default\.venv\Lib\site-packages\import_export\resources.py", line 281, in <listcomp>
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resource.export_field(f, instance) if instance else ""
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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File "…\import-db-default\.venv\Lib\site-packages\import_export\resources.py", line 1066, in export_field
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return field.export(obj)
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^^^^^^^^^^^^^^^^^
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File "…\import-db-default\.venv\Lib\site-packages\import_export\fields.py", line 148, in export
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return self.widget.render(value, obj)
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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File "…\import-db-default\.venv\Lib\site-packages\import_export\widgets.py", line 266, in render
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value = timezone.localtime(value)
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^^^^^^^^^^^^^^^^^^^^^^^^^
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File "…\import-db-default\.venv\Lib\site-packages\django\utils\timezone.py", line 182, in localtime
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if is_naive(value):
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^^^^^^^^^^^^^^^
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File "…\import-db-default\.venv\Lib\site-packages\django\utils\timezone.py", line 234, in is_naive
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return value.utcoffset() is None
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^^^^^^^^^^^^^^^
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AttributeError: 'DatabaseDefault' object has no attribute 'utcoffset'

‎import_db_default/admin.py‎

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from django.contrib.admin import register, ModelAdmin
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from import_export.admin import ImportExportMixin
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from .models import Item
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@register(Item)
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class ItemAdmin(ImportExportMixin, ModelAdmin):
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list_display = ["name", "created"]

‎import_db_default/migrations/0001_initial.py‎

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# Generated by Django 5.0.1 on 2024-01-12 10:49
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import django.db.models.functions.datetime
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from django.db import migrations, models
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class Migration(migrations.Migration):
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initial = True
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dependencies = [
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]
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operations = [
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migrations.CreateModel(
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name='Item',
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fields=[
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('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
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('name', models.CharField(max_length=100)),
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('created', models.DateTimeField(auto_now_add=True, db_default=django.db.models.functions.datetime.Now())),
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],
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),
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]

‎import_db_default/migrations/__init__.py‎

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‎import_db_default/models.py‎

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from django.db import models
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from django.db.models.functions import Now
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class Item(models.Model):
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name = models.CharField(max_length=100)
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created = models.DateTimeField(auto_now_add=True, db_default=Now())

‎import_db_default/settings.py‎

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import os
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from pathlib import Path
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BASE_DIR = Path(__file__).resolve().parent.parent
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DEBUG = True
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SECRET_KEY = "django-insecure-34q#9n1j46yc)+1c6&%$_$-ql%qxz^fzlf@0@1xm-zvroai1ju"
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INSTALLED_APPS = [
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"django.contrib.admin",
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"django.contrib.auth",
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"django.contrib.contenttypes",
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"django.contrib.sessions",
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"django.contrib.messages",
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"django.contrib.staticfiles",
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"import_export",
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"import_db_default",
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]
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MIDDLEWARE = [
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"django.middleware.security.SecurityMiddleware",
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"django.contrib.sessions.middleware.SessionMiddleware",
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"django.middleware.common.CommonMiddleware",
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"django.middleware.csrf.CsrfViewMiddleware",
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"django.contrib.auth.middleware.AuthenticationMiddleware",
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"django.contrib.messages.middleware.MessageMiddleware",
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"django.middleware.clickjacking.XFrameOptionsMiddleware",
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]
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ROOT_URLCONF = "import_db_default.urls"
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TEMPLATES = [
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{
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"BACKEND": "django.template.backends.django.DjangoTemplates",
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"DIRS": [],
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"APP_DIRS": True,
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"OPTIONS": {
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"context_processors": [
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"django.template.context_processors.debug",
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"django.template.context_processors.request",
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"django.contrib.auth.context_processors.auth",
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"django.contrib.messages.context_processors.messages",
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],
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},
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},
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]
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WSGI_APPLICATION = "import_db_default.wsgi.application"
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# Database
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# https://docs.djangoproject.com/en/5.0/ref/settings/#databases
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DATABASES = {
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"default": {
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"ENGINE": "django.db.backends.postgresql",
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"NAME": os.environ.get("DB_NAME", "bugs"),
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"USER": os.environ.get("DB_USER", "postgres"),
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"PASSWORD": os.environ.get("DB_PASSWORD", None),
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"HOST": os.environ.get("DB_HOST", None),
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"PORT": int(os.environ["DB_PORT"]) if "DB_PORT" in os.environ else None,
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},
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}
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# Authentication and password validation
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# https://docs.djangoproject.com/en/5.0/ref/settings/#auth-password-validators
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AUTH_PASSWORD_VALIDATORS = [
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{
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"NAME": "django.contrib.auth.password_validation.UserAttributeSimilarityValidator",
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},
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{
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"NAME": "django.contrib.auth.password_validation.MinimumLengthValidator",
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},
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{
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"NAME": "django.contrib.auth.password_validation.CommonPasswordValidator",
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},
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{
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"NAME": "django.contrib.auth.password_validation.NumericPasswordValidator",
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},
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]
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# Internationalization
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# https://docs.djangoproject.com/en/5.0/topics/i18n/
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LANGUAGE_CODE = "en"
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USE_I18N = True
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TIME_ZONE = "Europe/Malta"
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USE_TZ = True
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# Static files (CSS, JavaScript, Images)
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# https://docs.djangoproject.com/en/5.0/howto/static-files/
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STATIC_URL = "static/"
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MEDIA_URL = "media/"
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STATIC_ROOT = BASE_DIR.joinpath(os.environ.get("STATIC_ROOT", "local/static")) # target directory for "collectstatic" command (used only in production)
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MEDIA_ROOT = BASE_DIR.joinpath(os.environ.get("MEDIA_ROOT", "local/media")) # application-related media
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# Default primary key field type
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# https://docs.djangoproject.com/en/5.0/ref/settings/#default-auto-field
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DEFAULT_AUTO_FIELD = "django.db.models.BigAutoField"

‎import_db_default/urls.py‎

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from django.contrib import admin
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from django.urls import path
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urlpatterns = [
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path("admin/", admin.site.urls),
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]

‎import_db_default/wsgi.py‎

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import os
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from django.core.wsgi import get_wsgi_application
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os.environ.setdefault("DJANGO_SETTINGS_MODULE", "import_db_default.settings")
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application = get_wsgi_application()

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