I started learning Go a few weeks ago and this is my first proper project using Go. I wanted to use it to get to grips with some basic CRUD operations using a PostgreSQL database and pgx (a Go toolkit for PostgreSQL). It runs in the terminal without any web interface or API's.
- how to structure a Go project
- how pgx works / what it offers
- tried out a validation library called ozzo
- how to use
os.Argsto access raw command-line arguments - how to access env variables in the project
- getting used to working with a strongly typed langauge
- recapped on SQL (I didn't want to use an ORM)
I'm sure there are lots of improvements that could be made but it's a start!
- Go
-
Firstly you will need to create and connect to a PostgreSQL DB and add your env variables to the
.envfile -
Make sure you are in the root of the project
-
Create the table -
psql nameOfYourDb -f ./db/scripts/create_table.sql -
Insert data to the table -
psql nameOfYourDb -f ./db/scripts/insert_data.sql -
Run the program -
go run cmd/main.go(you should get a message sayingWelcome to Katie's Record Store!) -
Now you know everything is working you can run the program followed by the operation you want to perform and the input data (if neccessary)...
- get all the albums -
go run cmd/main.go getAlbums - get a specific album -
go run cmd/main.go getAlbum 3(gets the album with an id of 3) - add an album -
go run cmd/main.go addAlbum 21 Adele 4(creates an album with the title '21', artist 'Adele', rating '4') - update an album -
go run cmd/main.go updateAlbum 11 21 Adele 5(updates the album with an id of 11 to title '21', artist 'Adele', rating '5') - delete an album -
go run cmd/main.go deleteAlbum 1(deletes the album with the id of 1)
- get all the albums -
-
The validation I implemented means that:
- the rating has to be between 1 and 5
- the title and artist have to be at least 1 character