toasty_core/error/
invalid_result.rs

1use super::Error;
2
3/// Error when a query result has an unexpected structure.
4///
5/// This occurs when:
6/// - A query returns a different result type than expected (Count vs Stream)
7/// - A row value has an unexpected type (expected Record, got something else)
8/// - A field has an unexpected type (expected I64, got something else)
9///
10/// This indicates the database returned valid data, but its structure doesn't match
11/// what the query operation expected based on the schema and query type.
12#[derive(Debug)]
13pub(super) struct InvalidResult {
14    message: Box<str>,
15}
16
17impl std::error::Error for InvalidResult {}
18
19impl core::fmt::Display for InvalidResult {
20    fn fmt(&self, f: &mut core::fmt::Formatter) -> core::fmt::Result {
21        write!(f, "invalid result: {}", self.message)
22    }
23}
24
25impl Error {
26    /// Creates an invalid result error.
27    ///
28    /// This is used when a query result has an unexpected structure - the database
29    /// returned valid data, but its shape doesn't match what the operation expected.
30    ///
31    /// # Examples
32    ///
33    /// ```
34    /// use toasty_core::Error;
35    ///
36    /// let err = Error::invalid_result("expected Stream, got Count");
37    /// assert!(err.is_invalid_result());
38    /// assert_eq!(err.to_string(), "invalid result: expected Stream, got Count");
39    /// ```
40    pub fn invalid_result(message: impl Into<String>) -> Error {
41        Error::from(super::ErrorKind::InvalidResult(InvalidResult {
42            message: message.into().into(),
43        }))
44    }
45
46    /// Returns `true` if this error is an invalid result error.
47    pub fn is_invalid_result(&self) -> bool {
48        matches!(self.kind(), super::ErrorKind::InvalidResult(_))
49    }
50}
toasty_core/error/invalid_result.rs

toasty_core/error/
invalid_result.rs
