Crate rexie

Expand description

Rexie is an easy-to-use, futures based wrapper around IndexedDB that compiles to webassembly.

Usage

To use Rexie, you need to add the following to your Cargo.toml:

[dependencies]
rexie = "0.4"

Example

To create a new database, you can use the Rexie::builder method:

use rexie::*;

async fn build_database() -> Result<Rexie> {
   // Create a new database
   let rexie = Rexie::builder("test")
       // Set the version of the database to 1.0
       .version(1)
       // Add an object store named `employees`
       .add_object_store(
           ObjectStore::new("employees")
               // Set the key path to `id`
               .key_path("id")
               // Enable auto increment
               .auto_increment(true)
               // Add an index named `email` with the key path `email` with unique enabled
               .add_index(Index::new("email", "email").unique(true)),
       )
       // Build the database
       .build()
       .await?;

    // Check basic details of the database
    assert_eq!(rexie.name(), "test");
    assert_eq!(rexie.version(), 1.0);
    assert_eq!(rexie.store_names(), vec!["employees"]);

    Ok(rexie)
}

To add an employee, you can use the Store::add method after creating a Transaction:

use rexie::*;

async fn add_employee(rexie: &Rexie, name: &str, email: &str) -> Result<u32> {
    // Create a new read-write transaction
    let transaction = rexie.transaction(&["employees"], TransactionMode::ReadWrite)?;
     
    // Get the `employees` store
    let employees = transaction.store("employees")?;
     
    // Create an employee
    let employee = serde_json::json!({
        "name": name,
        "email": email,
    });
    // Convert it to `JsValue`
    let employee = serde_wasm_bindgen::to_value(&employee).unwrap();

    // Add the employee to the store
    let employee_id = employees.add(&employee, None).await?;
     
    // Waits for the transaction to complete
    transaction.done().await?;

    // Return the employee id
    Ok(num_traits::cast(employee_id.as_f64().unwrap()).unwrap())
}

To get an employee, you can use the Store::get method after creating a Transaction:

use rexie::*;

async fn get_employee(rexie: &Rexie, id: u32) -> Result<Option<serde_json::Value>> {
    // Create a new read-only transaction
    let transaction = rexie.transaction(&["employees"], TransactionMode::ReadOnly)?;
     
    // Get the `employees` store
    let employees = transaction.store("employees")?;
     
    // Get the employee
    let employee = employees.get(&id.into()).await?;

    // Convert it to `serde_json::Value` from `JsValue`
    let employee: Option<serde_json::Value> = serde_wasm_bindgen::from_value(employee).unwrap();

    // Return the employee
    Ok(employee)
}