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multi-db-conn's Introduction

Sandbox for using multiple database in Rust

How to run

1. Setup diesel

See diesel official documentation and install client(diesel-cli).

Doc: https://diesel.rs/guides/getting-started.html

$ cargo install diesel_cli --no-default-features --features postgres

2. Start two PostgreSQL containers by docker-compose

docker compose up -d

3. Migrate the databases and insert sample data

$ diesel migration run --database-url postgres://postgres:password1@localhost:15432/docker
$ diesel migration run --database-url postgres://postgres:password2@localhost:15433/docker
$ psql postgres://postgres:password1@localhost:15432/docker -c "insert into sample_user values (1, 1, 'this is tenant_1')"
$ psql postgres://postgres:password2@localhost:15433/docker -c "insert into sample_user values (1, 2, 'this is tenant_2')"

4. Run sample code

$ cargo run

You can get the following results.

tenant_id: 1
Ok(
    [
        SampleUser {
            id: 1,
            tenant_id: 1,
            value: "this is tenant_1",
        },
    ],
)
tenant_id: 2
Ok(
    [
        SampleUser {
            id: 1,
            tenant_id: 2,
            value: "this is tenant_2",
        },
    ],
)

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