Django切换数据库和迁移数据详解

db_config = {
    'sqlite': {
        'ENGINE': 'django.db.backends.sqlite3',
        'NAME': os.path.join(BASE_DIR, 'db.sqlite3'),
        'OPTIONS': {
            'timeout': 20,
        }
    },
    'pgsql': {
        'ENGINE': 'django.db.backends.postgresql',
        'NAME': '数据库名称',
        'USER': '用户名',
        'PASSWORD': '密码',
        'HOST': '数据库服务器地址',
        'PORT': 5432,
    },
    'mysql': {
        'ENGINE': 'django.db.backends.mysql',
        'NAME': '数据库名称',
        'USER': '用户名',
        'PASSWORD': '密码',
        'HOST': '数据库服务器地址',
        'PORT': 3306,
    }
}
# 这里可以方便切换不同数据库
DATABASES = {'default': db_config['pgsql']}

CommandError: Unable to serialize database: 'gbk' codec can't encode character '\u30fb' in position 4: illegal multibyte sequence

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

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

django.db.utils.IntegrityError: Problem installing fixture 'db.json'  Could not load contenttypes.ContentType(pk=15): (1062, "Duplicate entry 'xxx' for key 'django_content_type.django_content_type_app_label_model_76bd3d3b_uniq'")

python3 manage.py dumpdata --natural-primary --natural-foreign -o db.json

python3 manage.py shell

from django.contrib.contenttypes.models import ContentType
ContentType.objects.all().delete()

UnicodeDecodeError: ‘utf-8' codec can't decode byte 0xff in position 0: invalid start byte in Django

python -Xutf8 manage.py loaddata db.json

lib\site-packages\django\core\serializers\json.py

stream_or_string = stream_or_string.decode()

stream_or_string = stream_or_string.decode('UTF-16')