django.db.utils.OperationalError: could not translate host name "db" to address: nodename nor servname provided, or not know

[hellojunho]

This error occur when i try command "python manage.py migrate"

I checked this error's cause but I can't resolve this error.

error message

django.db.utils.OperationalError: could not translate host name "db" to address: nodename nor servname provided, or not know

[kim-song-jun]

I think that error occured by db name. I will check it

[kim-song-jun]

Hi, I hope you must be run python migration command in docker images you can exec docker image using this command docker exec -it 'image name' /bin/bash

image name can find in this command docker ps

and in docker image, you can run these commands python3 manage.py migrate

python3 manage.py makemigrations

[kim-song-jun]

In docker, all of our service will run on docker image. so we must run our command in docker image. e.g. collectstatics, migrate, makemigrations, run server

[hellojunho]

Thank you! I'm able to solve the problem thanks to your help!