structsy 0.5.2

Simple single file structs database
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84

use structsy::{Structsy, StructsyTx};
use structsy_derive::{queries, Persistent, PersistentEmbedded};
use tempfile::tempdir;

#[derive(PersistentEmbedded, Eq, PartialEq, Debug)]
struct Value {
    pos: u32,
    val: u32,
}

#[derive(Persistent, Eq, PartialEq, Debug)]
enum SimpleEnum {
    First(Value),
    Second,
}

#[test]
fn save_enum_read() {
    let dir = tempdir().expect("can make a tempdir");
    let file = dir.path().join("save_enum_read.db");
    let id;
    let id_second;
    {
        let db = Structsy::open(&file).expect("can open just create");
        db.define::<SimpleEnum>().expect("can define the struct");
        let data = SimpleEnum::First(Value { pos: 10, val: 20 });
        let second_data = SimpleEnum::Second;
        let mut tx = db.begin().expect("transaction started");
        id = tx.insert(&data).expect("data saved correctly");
        id_second = tx.insert(&second_data).expect("data saved correctly");
        tx.commit().expect("trasaction is committed");
    }
    {
        let config = Structsy::config(file).create(false);
        let db = Structsy::open(config).expect("can open just create");
        db.define::<SimpleEnum>().expect("can define the struct");
        let data = db
            .read(&id)
            .expect("can read just saved record")
            .expect("the record is there");
        assert_eq!(data, SimpleEnum::First(Value { pos: 10, val: 20 }));
        let data_second = db
            .read(&id_second)
            .expect("can read just saved record")
            .expect("the record is there");
        assert_eq!(data_second, SimpleEnum::Second);
    }
}

#[derive(PersistentEmbedded, Clone, PartialEq, Debug)]
enum Options {
    Best,
    Medium,
}

#[derive(Persistent)]
struct Container {
    option: Options,
}

#[queries(Container)]
trait ContainerQueries {
    fn by_option(self, option: Options) -> Self;
}

#[test]
fn save_enum_query() {
    let dir = tempdir().expect("can make a tempdir");
    let file = dir.path().join("save_enum_read.db");
    let db = Structsy::open(&file).expect("can open just create");
    db.define::<Container>().expect("can define the struct");
    let mut tx = db.begin().expect("begins ok");
    tx.insert(&Container {
        option: Options::Medium,
    })
    .expect("insert works");
    tx.insert(&Container { option: Options::Best }).expect("insert works");
    tx.commit().expect("commit works");

    let result = db.query::<Container>().by_option(Options::Best).into_iter().count();
    assert_eq!(result, 1);
    let result = db.query::<Container>().by_option(Options::Best).into_iter().next();
    assert_eq!(result.unwrap().1.option, Options::Best);
}