Odoo 12 docker compose doesn't display mounted extra addons

I'm in search to create an extra addons on my odoo. I've created an addon, and I've set in my docker compose file to mount the folder containing my addon on a folder into my odoo docker image defining to read also this folder when odoo container starts. The problem is that I don't see my extra addons into the addons list when I'm using odoo via browser.

I'm using odoo 12 docker image in docker compose

Inside addons/ i have my extra addons and inside config/ i have my odoo.conf

docker-compose.yml

version: '2'
services:
  web:
    image: odoo:12.0
    depends_on:
      - db
    ports:
      - "8069:8069"
    volumes:
      - odoo-web-data:/var/lib/odoo
      - ./config:/etc/odoo
      - ./addons:/mnt/extra-addons
  db:
    image: postgres:10
    environment:
      - POSTGRES_DB=postgres
      - POSTGRES_PASSWORD=odoo
      - POSTGRES_USER=odoo
      - PGDATA=/var/lib/postgresql/data/pgdata
    volumes:
      - odoo-db-data:/var/lib/postgresql/data/pgdata
volumes:
  odoo-web-data:
  odoo-db-data:

odoo.conf

[options]
addons_path = /mnt/extra-addons
data_dir = /var/lib/odoo

If I display the content of addons I see:

$ ls addons/
custom-addon

custom-addon contains:

$ ls custom-addon/
controllers  demo  __init__.py  __manifest__.py  models  security  views

In a odoo log I read that /mnt/extra-addons was read by odoo:

web_1  | 2019-08-02 13:45:12,691 1 INFO ? odoo: addons paths: ['/var/lib/odoo/addons/12.0', '/mnt/extra-addons', '/usr/lib/python3/dist-packages/odoo/addons'] 

If I access into container and i list the content of /mnt/extra-addons I can see the content of my local addons folder mounted into container.

$ docker-compose run web bin/bash
odoo@1cb225a60e13:/$ ls mnt/extra-addons/
custom-addon

But I can't see my addons listed into the modules list on odoo

Solution 1:

Open Odoo in debug mode (either from Settings page or just modify the URL yourself) go to the Apps menu and proceed with "Update Apps List" menu. That will open a wizard. Just press the "Update" button. The wizard will Odoo tell to update the modules list/table (ir_module_module). Afterwards you should see them under Apps.