Django Custom Management Commands

In Django project, We could manage by executing some commands which could be invoked through the manage.py.

For example:

# Start the webserver
python manage.py runserver

Management Command is used to create our own actions with manage.py.

If your app is in projectdirectory then create the directories projectdirectory/app/management/commands.

Create an empty file called __init__.py in both the management and commands directories. This will make that every other python file in the commands directory can be executed via manage.py command.

If you create the file project/app/management/commands/management_command.py. Django will register a manage.py command for each Python module in that directory whose name doesn’t begin with an underscore, then it can be run as manage.py management_command.

 

Example: Management command to create elasticsearch index.

In the app which the command is used for make the following directory structure:

 

management/

    __init__.py

    commands/

        __init__.py

        create_index.py

 

#in create_index.py file add the following code.
import json, requests
from django.core.management.base import BaseCommand, CommandError
 
class Command(BaseCommand):
    help = 'create elasticsearch index'
 
    def handle(self, *args, **options):
        data = {
            "settings": {
                "number_of_shards": 4,
                "number_of_replicas": 1
            },
            "mappings": {
                "notebook": {
                    "properties": {
                        "title": { "type": "string", "boost": 4 },
                        "description": { "type": "string", "boost": 2 },
                        "content": { "type": "string" }
                    }
                }
            }
        }
 
        url = 'http://127.0.0.1:9200/my_index/'
        response = requests.put(url, data=json.dumps(data))
        print(response.text)
 
 

In the above example, I'm using management command to create a my_index with title, description and content. Now run the following command to create index.

python manage.py create_index

Above command should return the response '{"acknowledged":true}' after successful index creation.

Posted On 21 July 2012 By MicroPyramid


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