datasources 0.1.47

Async datasource interfaces, middleware, registry, and test doubles
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

use std::collections::HashMap;

#[derive(Clone, Debug, Default, PartialEq, Eq)]
pub struct SchemaColumn {
    pub type_name: String,
    pub nullable: bool,
    pub has_default: bool,
    pub is_id: bool,
}

impl SchemaColumn {
    pub fn new(type_name: impl Into<String>) -> Self {
        Self {
            type_name: type_name.into(),
            nullable: false,
            has_default: false,
            is_id: false,
        }
    }
}

impl From<&str> for SchemaColumn {
    fn from(type_name: &str) -> Self {
        Self::new(type_name)
    }
}

impl From<String> for SchemaColumn {
    fn from(type_name: String) -> Self {
        Self::new(type_name)
    }
}

#[derive(Clone, Default)]
pub struct Schema {
    pub columns: HashMap<String, SchemaColumn>,
}

impl Schema {
    pub fn new(columns: HashMap<String, SchemaColumn>) -> Self {
        Self { columns }
    }

    pub fn ids(&self) -> Vec<String> {
        self.columns
            .iter()
            .filter(|(_, column)| column.is_id)
            .map(|(name, _)| name.clone())
            .collect()
    }

    pub fn types(&self) -> HashMap<String, String> {
        self.columns
            .iter()
            .map(|(name, column)| (name.clone(), column.type_name.clone()))
            .collect()
    }
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn ids_uses_is_id() {
        let schema = Schema::new(HashMap::from([
            (
                "Key".into(),
                SchemaColumn {
                    type_name: "string".into(),
                    is_id: true,
                    ..SchemaColumn::new("string")
                },
            ),
            ("Name".into(), SchemaColumn::new("string")),
        ]));
        assert_eq!(schema.ids(), vec!["Key".to_string()]);
    }
}