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https://github.com/actix/examples
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91 lines
2.4 KiB
Markdown
91 lines
2.4 KiB
Markdown
# async_pg example
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## This example illustrates
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- `tokio_postgres`
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- use of `tokio_pg_mapper` for postgres data mapping
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- `deadpool_postgres` for connection pooling
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- `dotenv` + `config` for configuration
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## Instructions
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### NOTE:
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You may need to ensure that you are running the commands with the correct SQL user. On many Linux distributions you may prefix the shell commands with `sudo -u postgres`
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1. Create database user
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```shell
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createuser -P test_user
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```
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Enter a password of your choice. The following instructions assume you used `testing` as password.
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This step is **optional** and you can also use an existing database user for that. Just make sure to replace `test_user` by the database user of your choice in the following steps and change the `.env` file containing the configuration accordingly.
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An alternative using SQL:
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```sql
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CREATE USER test_user WITH PASSWORD 'testing';
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```
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2. Create database
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```shell
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createdb -O test_user testing_db
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```
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An alternative using SQL:
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```sql
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CREATE DATABASE testing_db OWNER test_user;
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```
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3. Initialize database
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```shell
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psql -f sql/schema.sql testing_db
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```
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This step can be repeated and clears the database as it drops and recreates the schema `testing` which is used within the database.
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4. Grant privileges to new user
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```sql
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GRANT ALL PRIVILEGES ON SCHEMA testing TO test_user;
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GRANT ALL PRIVILEGES ON ALL TABLES IN SCHEMA testing TO test_user;
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GRANT ALL PRIVILEGES ON ALL SEQUENCES IN SCHEMA testing TO test_user;
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```
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5. Create `.env` file:
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```ini
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SERVER_ADDR=127.0.0.1:8080
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PG__USER=test_user
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PG__PASSWORD=testing
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PG__HOST=127.0.0.1
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PG__PORT=5432
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PG__DBNAME=testing_db
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PG__POOL_MAX_SIZE=16
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```
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6. Run the server:
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```shell
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cargo run
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```
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7. Using a different terminal send an HTTP POST request to the running server:
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```shell
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echo '{"email": "ferris@thecrab.com", "first_name": "ferris", "last_name": "crab", "username": "ferreal"}' | http -f --json --print h POST http://127.0.0.1:8080/users
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```
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**...or using curl...**
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```shell
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curl -i -d '{"email": "ferris@thecrab.com", "first_name": "ferris", "last_name": "crab", "username": "ferreal"}' -H 'Content-Type: application/json' http://127.0.0.1:8080/users
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```
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A unique constraint exists for username, so sending this request twice will return an internal server error (HTTP 500).
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