Infinitree，嵌入式数据库

use infinitree::{
    Infinitree,
    Index,
    Key,
    anyhow,
    backends::Directory,
    fields::{Serialized, VersionedMap, LocalField},
};
use serde::{Serialize, Deserialize};

#[derive(Serialize, Deserialize)]
pub struct PlantHealth {
    id: usize,
    air_humidity: usize,
    soil_humidity: usize,
    temperature: f32
}

#[derive(Index, Default, Clone)]
pub struct Measurements {
// rename the field when serializing
#[infinitree(name = "last_time")]
    _old_last_time: Serialized<String>,

#[infinitree(name = "last_time2")]
    last_time: Serialized<usize>,

// only store the keys in the index, not the values
#[infinitree(strategy = "infinitree::fields::SparseField")]
    measurements: VersionedMap<usize, PlantHealth>,

// skip the next field when loading & serializing
#[infinitree(skip)]
    current_time: usize,
}

fn main() -> anyhow::Result<()> {
let mut tree = Infinitree::<Measurements>::empty(
        Directory::new("/storage")?,
        Key::from_credentials("username", "password")?
    );

    tree.index().measurements.insert(1, PlantHealth {
        id: 0,
        air_humidity: 50,
        soil_humidity: 60,
        temperature: 23.3,
    });

    *tree.index().last_time.write() = 1;
    tree.commit("first measurement! yay!");
Ok(())
}

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