wasm_dbms_api/dbms/
autoincrement.rs

1//! Autoincrement type and related functions.
2
3/// Represents an autoincrement value, which can either be automatically generated or explicitly provided.
4///
5/// This is used when providing values in [`crate::prelude::InsertRecord`] if a column is defined as autoincrement.
6/// If the value is set to [`Autoincrement::Auto`], the DBMS will automatically generate the next value for that column.
7/// If it is set to [`Autoincrement::Value`], the provided value will be used instead.
8#[derive(Debug, Clone, PartialEq, Eq)]
9pub enum Autoincrement<T>
10where
11    T: std::fmt::Debug + Clone + PartialEq + Eq,
12{
13    /// Indicates that the value should be automatically generated by the DBMS.
14    Auto,
15    /// Indicates that the provided value should be used for the autoincrement column.
16    ///
17    /// Once inserted, the next value for the autoincrement column will be `provided value + 1`.
18    Value(T),
19}
20
21impl<T> Autoincrement<T>
22where
23    T: std::fmt::Debug + Clone + PartialEq + Eq,
24{
25    /// Converts the `Autoincrement` value into an [`Option<T>`], where [`Autoincrement::Auto`] is represented as [`Option::None`],
26    /// and [`Autoincrement::Value`] is represented as [`Option::Some`].
27    pub fn into_option(self) -> Option<T> {
28        match self {
29            Autoincrement::Auto => None,
30            Autoincrement::Value(v) => Some(v),
31        }
32    }
33}
34
35#[cfg(test)]
36mod tests {
37
38    use super::*;
39
40    #[test]
41    fn test_autoincrement_into_option() {
42        let auto = Autoincrement::<i32>::Auto;
43        let value = Autoincrement::Value(42);
44
45        assert_eq!(auto.into_option(), None);
46        assert_eq!(value.into_option(), Some(42));
47    }
48}
wasm_dbms_api/dbms/autoincrement.rs

wasm_dbms_api/dbms/
autoincrement.rs
