Attributeerror: ‘disabledbackend’ object has no attribute ‘_get_task_meta_for’

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Explanation of AttributeError: ‘DisabledBackend’ object has no attribute ‘_get_task_meta_for’

This error occurs when using the Celery task queue with the Django web framework, and it indicates that the 'DisabledBackend' object does not have the '_get_task_meta_for' attribute. This attribute is necessary for Celery to retrieve the metadata for a specific task, such as its status or result.

The most common cause of this error is the misconfiguration of Celery’s backend settings in the Django project’s settings file. The backend is responsible for storing task metadata and results.

To resolve this error, follow these steps:

  1. Open the Django project’s settings file (usually named settings.py)
  2. Locate the CELERY_RESULT_BACKEND setting
  3. Make sure the value of this setting is a supported backend such as 'db+sqlite://db.sqlite3' for using SQLite database, 'rpc://‘ for using RabbitMQ, or other supported backends
  4. If the value is already correct, ensure that the backend server is running and reachable
  5. Save the settings file and restart the Django server

Here is an example of a correct configuration in the settings file: 

    
# settings.py

# Django Celery Configuration
CELERY_BROKER_URL = 'amqp://guest@localhost//'
CELERY_RESULT_BACKEND = 'rpc://'

# Other Django settings...

In this example, we are using RabbitMQ as the message broker by setting 'amqp://guest@localhost//' in CELERY_BROKER_URL, and the RPC backend for storing task metadata by setting 'rpc://' in CELERY_RESULT_BACKEND.

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