Browser error reporting

Check the front end and check the error information as follows

Access to XMLHttpRequest at ‘ http://127.0.0.1:8000/categorys/ ‘ from origin ‘ http://localhost:8080 ‘ has been blocked by CORS policy: No ‘Access-Control-Allow-Origin’ header is present on the requested resource.

Solve cross domain problems through the back end

Refer to the solution on GitHub

Search Django CORS headers to see

1. Installing in a virtual environment

python -m pip install django-cors-headers

2. Configure settings

INSTALLED_APPS = [
    ...,
    "corsheaders",
    ...,
]


MIDDLEWARE = [
    ...,
    "corsheaders.middleware.CorsMiddleware",
    "django.middleware.common.CommonMiddleware",
    ...,
]
# CorsMiddleware should be prior to CommonMiddleware

CORS_ALLOW_ALL_ORIGINS=True

After restarting the project, the browser will no longer report cross-domain errors