johanbrandhorst/grpc-postgres

README

grpc-postgres

An example repo of how I like to use postgres with gRPC

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Source: Charles Clavadetscher

Usage

First, start a postgres container:

$ docker run --rm -d --name postgres -p 5432:5432 -e POSTGRES_USER=postgres -e POSTGRES_PASSWORD=mypass -e POSTGRES_DB=postgres postgres:13
d1a2eb0fb44da9c3488184f5296da28d1c7f88bd32bd4ec81fc254f006886b03

Start the server:

$ POSTGRES_URL=postgresql://postgres:mypass@localhost:5432/postgres?sslmode=disable go run main.go
...
{"level":"info","msg":"Serving gRPC on [::]:8080"}
{"level":"info","msg":"Serving Web UI on http://0.0.0.0:8080"}

Navigate to http://0.0.0.0:8080 to see the auto-generated web UI for the service, courtesy of gRPC reflection and github.com/fullstorydev/grpcui!

Usage with Cockroach DB

The application also supports talking to a Cockroach DB instance, by using the cockroachdb scheme:

cockroachdb://user:password@host:5432/defaultdb

The scheme is used when performing the database migrations, as the behaviour changes based on the database.

Developing

Requirements

go > 1.21

Making changes

After making any changes to the proto file or the migrations, make sure to regenerate the files:

$ make generate

If you want to change the schema of the database, add another migration file. Use the same naming format, with the new file names starting 2_. Make sure to run make generate and increment the migration version in users/helpers.go.