Extending the Basic KV Store

Key/Value stores are super fast and effective. and Sled is one of the best out there.

This crate seeks to better organize the basic K/V data so that it has much more meaning. Something closer to the kind of organization you would get in a document store but running on top of Sled for maximum speed.

The following example attempts to organize Japanese Machines into a dataset of vehicles & electronics.

```rust pub mod db;

use crate::db::kv;

use std::{error::Error, path::Path, result::Result };

fn main() -> Result<(), Box> { // path where your database is to be stored // Note the folder is created if missing let path = Path::new("./db");

 // reset
// Note reset deletes the entire KV directory
kv::reset(Some(&path))?;

//init with index path...
kv::init(Some(&path))?;

// set bucket name. 
let bucket = "Japanese-Machines";


//create your value
//the value includes a name as well as a vector of the kv::Types enum values
let vehicles = kv::Record{
    name:"models".into(), //should be a string
    values: vec![
        kv::Types::String("Toyota".into()), 
        kv::Types::String("Subaru".into()), 
    ]
};


// set value by passing key & value
kv::set(&bucket, "vehicles", vehicles)?;


let tvs = kv::Record{
    name:"models".into(), //should be a string
    values: vec![
        kv::Types::String("Sony".into()), 
        kv::Types::String("Sharp".into()), 
    ]
};


kv::set(&bucket, "electronics-tvs", tvs)?;

let radios = kv::Record{
    name:"old-models".into(), //should be a string
    values: vec![
        kv::Types::String("Hitachi".into()), 
        kv::Types::String("Toshiba".into()), 
    ]
};


kv::set(&bucket, "electronics-radios", radios)?;

// get single value
let value = kv::get(&bucket, "electronics-radios");
println!("{:#?}", value);

// get all values with filter
// here we filter for all electronics that are old models
// Because the Filter struct takes Options as values, you can also enter None
// Note: filters ise the WildMatch crate (https://docs.rs/wildmatch/2.1.0/wildmatch/) so all patterns supported by WildMatch will work fine. 
let filter = kv::Filter{
    key : Some("electronics*"),
    name:Some("old*")
    // name:None
};

// now fetch
let all = kv::get_all(&bucket, Some(filter));

println!("{:#?}", all);

Ok(())

}

```