ldpos-knex-dal v4.4.2

ldpos-pg-dal

Postgres Data Access Layer for LDPoS.

Install docker

• Install docker-engine or docker-desktop
• Make sure docker command is available on the path.

Starting postgres

• Run yarn start:db to start postgres instance inside docker
• Type ctrl+c, yarn stop:dbto stop & remove old db instance.

Starting pgadmin

• Run yarn start:pgadmin
• Visit localhost:8081 for pgadmin interface.
• Login using creds specified in docker-compose.yml file under pgadmin service.
• Click Add New Server -> General Tab -> Name = Test-Server
• Click Connection tab -> Host name/address = postgres_db -> Port = 5432 -> Maintenance database = neutral
• Copy creds for login from docker-compose.yml file under db service

Working with database migrations

• Create migration using yarn migrate:make migrration_name e.g. yarn migrate:make create_table_table_name
• Set migration names descriptive, follow snake case for migration name and table names (column names can be kept camelCase).
• To run migration against db, run

    yarn migrate

• To rollback migration

    yarn migrate:rollback

Creating seeds

• Create migration using yarn seed:make seed_name e.g. yarn seed:make accounts
• follow snake case for seeds and seed name is usually table name.
• To run seeds against db, run

    yarn seed