versatile-data 0.57.1

A library for databases that has convenient datasets that group together commonly used fields and gives you the flexibility to create your own fields.
Documentation 
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#[cfg(test)]
#[test]
fn test4() {
    use versatile_data::prelude::*;

    let dir = "./vd-test4/";
    if std::path::Path::new(dir).exists() {
        std::fs::remove_dir_all(dir).unwrap();
    }

    if let Ok(mut data) = Data::new(dir) {
        data.update(&Operation::New {
            activity: Activity::Active,
            term_begin: Term::Defalut,
            term_end: Term::Defalut,
            fields: vec![
                KeyValue::new("name", "test".to_owned()),
                KeyValue::new("password", "test".to_owned()),
            ],
        })
        .unwrap();
        data.update(&Operation::New {
            activity: Activity::Active,
            term_begin: Term::Defalut,
            term_end: Term::Defalut,
            fields: vec![
                KeyValue::new("name", "test2".to_owned()),
                KeyValue::new("password", "test".to_owned()),
            ],
        })
        .unwrap();
        data.update(&Operation::New {
            activity: Activity::Active,
            term_begin: Term::Defalut,
            term_end: Term::Defalut,
            fields: vec![
                KeyValue::new("name", "test3".to_owned()),
                KeyValue::new("password", "test".to_owned()),
            ],
        })
        .unwrap();
        data.update(&Operation::Delete { row: 2 }).unwrap();
        data.update(&Operation::New {
            activity: Activity::Active,
            term_begin: Term::Defalut,
            term_end: Term::Defalut,
            fields: vec![
                KeyValue::new("name", "test4".to_owned()),
                KeyValue::new("password", "test".to_owned()),
            ],
        })
        .unwrap();
        let r = data
            .search_default()
            .result_with_sort(vec![Order::Asc(OrderKey::Serial)]);
        println!("{:?}", r);
    }
    if let Ok(mut data) = Data::new(dir) {
        data.update(&Operation::New {
            activity: Activity::Active,
            term_begin: Term::Defalut,
            term_end: Term::Defalut,
            fields: vec![
                KeyValue::new("name", "test5".to_owned()),
                KeyValue::new("password", "test".to_owned()),
            ],
        })
        .unwrap();
        let r = data
            .search_default()
            .result_with_sort(vec![Order::Asc(OrderKey::Serial)]);
        println!("{:?}", r);
    }

    println!("OK");
}