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FromValue

Trait FromValue 

Source
pub trait FromValue: Sized {
    // Required method
    fn from_value(value: &Value) -> Result<Self>;
}
Expand description

Converts a Value to a concrete Rust type.

Implemented for common types like i64, f64, String, and bool. Used by QueryResult::scalar() to extract typed values.

Required Methods§

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fn from_value(value: &Value) -> Result<Self>

Attempts the conversion, returning an error on type mismatch.

Dyn Compatibility§

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types§

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impl FromValue for bool

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fn from_value(value: &Value) -> Result<Self>

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impl FromValue for f64

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fn from_value(value: &Value) -> Result<Self>

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impl FromValue for i64

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fn from_value(value: &Value) -> Result<Self>

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impl FromValue for String

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fn from_value(value: &Value) -> Result<Self>

Implementors§