[RUBY] Unify the Rails app time zone to Japan time

There are four time zones to consider:

--Ruby process --Affects Time.now etc.

Ruby process

Development environment (Docker)

Added ╩╗ENV TZ Asia / Tokyo to Dockerfile` to support

Production environment

Corresponding by setting TZ = Asia / Tokyo in the environment variable




config.time_zone = 'Tokyo'




config.active_record.default_timezone = :local

DB Connect to each DB of development environment and production environment and execute the following query

ALTER DATABASE db_name SET timezone TO 'Asia/Tokyo';

Since it is the writing method for Postgres, the writing method may differ depending on the type of DB. It will be reflected when you reconnect to the DB. Executing rails: db: migrate will restore the timezone, but it's okay because you rarely write SQL statements in Rails in the first place. There seems to be a way to set environment variables in docker-compose.yml, but it didn't work.


-Rails time zone summary-Qiita

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