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33 lines
2.2 KiB
Markdown
33 lines
2.2 KiB
Markdown
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### Database
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**DB-dump restoring process**
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The mariadb-container by default executes all .sql files it finds in the containers `/docker-entrypoint-initdb.d/` directory when the container is run the first time. The `data` directory is mounted there. It contains an initialization file (`restore_and_create.sql`) which will then restore the database from the sql-dumpfiles in `sqlfiles/`, and also create a user `'now_test'@'localhost'` with a password defined as MARIADB_PASSWORD in the .db.dev.env file for the database.
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**Accessing database inside docker**
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`docker exec -it nowdb-db mariadb -u now_test -p --database now_test`
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Enter the password defined in `.dev.env`.
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**Updating prisma-schema**
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If the database schema is changed, prisma-schema must be also updated. The smart prisma-way would be to run migrations via prisma, but I did this:
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+ The database was modified directly in SQL
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+ Anon-db dump was updated to reflect the changes by hand (for both the table structure and the data inputted to it)
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+ Also the test-db dump used locally was changed by hand, but this may be more complicated if theres a lot of data - in which case a new dump must be taken from the db after changes
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+ Notice that for the db-container to initialize data, you must remove the container and then the volume and rebuild
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+ I ran the dev version of the app `npm run dev`
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+ I ran `docker exec -it nowdb-backend-dev npx prisma db pull`
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+ The schema was updated and the changes can be committed to github.
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+ After any schema update, to run the app, the **Prisma client must be generated again** (the client is located in "prisma/generated"). I did it by running `npm run prisma` in `backend/` directory (outside of docker). Running it inside the container would not re-generate it correctly, not sure why.
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Prisma documentation: https://www.prisma.io/docs/orm/reference/prisma-cli-reference#db-pull
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**Mariadb-connector and transactions**
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Prisma does not have proper support for connecting to multiple databases, and transactionality between them is therefore impossible. We need transactional write to both now and now_log databases. Therefore we use mariadb-connector for the write operations that need to be logged into the log-database.
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