validator_async/
display_impl.rs

1use std::fmt::{self, Write};
2
3use crate::{ValidationError, ValidationErrors, ValidationErrorsKind};
4
5impl fmt::Display for ValidationError {
6    fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
7        if let Some(msg) = self.message.as_ref() {
8            write!(fmt, "{}", msg)
9        } else {
10            write!(fmt, "Validation error: {} [{:?}]", self.code, self.params)
11        }
12    }
13}
14
15fn display_errors(
16    fmt: &mut fmt::Formatter<'_>,
17    errs: &ValidationErrorsKind,
18    path: &str,
19) -> fmt::Result {
20    fn display_struct(
21        fmt: &mut fmt::Formatter<'_>,
22        errs: &ValidationErrors,
23        path: &str,
24    ) -> fmt::Result {
25        let mut full_path = String::new();
26        write!(&mut full_path, "{}.", path)?;
27        let base_len = full_path.len();
28        for (path, err) in errs.errors() {
29            write!(&mut full_path, "{}", path)?;
30            display_errors(fmt, err, &full_path)?;
31            full_path.truncate(base_len);
32        }
33        Ok(())
34    }
35
36    match errs {
37        ValidationErrorsKind::Field(errs) => {
38            write!(fmt, "{}: ", path)?;
39            let len = errs.len();
40            for (idx, err) in errs.iter().enumerate() {
41                if idx + 1 == len {
42                    write!(fmt, "{}", err)?;
43                } else {
44                    write!(fmt, "{}, ", err)?;
45                }
46            }
47            Ok(())
48        }
49        ValidationErrorsKind::Struct(errs) => display_struct(fmt, errs, path),
50        ValidationErrorsKind::List(errs) => {
51            let mut full_path = String::new();
52            write!(&mut full_path, "{}", path)?;
53            let base_len = full_path.len();
54            for (idx, err) in errs.iter() {
55                write!(&mut full_path, "[{}]", idx)?;
56                display_struct(fmt, err, &full_path)?;
57                full_path.truncate(base_len);
58            }
59            Ok(())
60        }
61    }
62}
63
64impl fmt::Display for ValidationErrors {
65    fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
66        for (idx, (path, err)) in self.errors().iter().enumerate() {
67            display_errors(fmt, err, path)?;
68            if idx + 1 < self.errors().len() {
69                writeln!(fmt)?;
70            }
71        }
72        Ok(())
73    }
74}
validator_async/display_impl.rs

validator_async/
display_impl.rs
