vld/combinators/
catch_val.rs

1use serde_json::Value;
2
3use crate::error::VldError;
4use crate::schema::VldSchema;
5
6/// Wraps a schema with a fallback value returned on ANY validation error.
7///
8/// Unlike [`ZDefault`](crate::modifiers::ZDefault) which only catches null/missing,
9/// `ZCatch` catches all errors including invalid data.
10///
11/// Created via [`VldSchema::catch()`].
12pub struct ZCatch<T: VldSchema>
13where
14    T::Output: Clone,
15{
16    inner: T,
17    fallback: T::Output,
18}
19
20impl<T: VldSchema> ZCatch<T>
21where
22    T::Output: Clone,
23{
24    pub fn new(inner: T, fallback: T::Output) -> Self {
25        Self { inner, fallback }
26    }
27
28    /// Access the inner schema.
29    pub fn inner_schema(&self) -> &T {
30        &self.inner
31    }
32}
33
34impl<T: VldSchema> VldSchema for ZCatch<T>
35where
36    T::Output: Clone,
37{
38    type Output = T::Output;
39
40    fn parse_value(&self, value: &Value) -> Result<T::Output, VldError> {
41        match self.inner.parse_value(value) {
42            Ok(v) => Ok(v),
43            Err(_) => Ok(self.fallback.clone()),
44        }
45    }
46    fn output_json(&self, o: &Self::Output) -> Option<Value> {
47        self.inner.output_json(o)
48    }
49}
vld/combinators/catch_val.rs

vld/combinators/
catch_val.rs
