pub trait ColumnIndex<T: ?Sized>: Sealed + Debug {
    // Required method
    fn index(&self, container: &T) -> Result<usize, Error>;
}
Expand description

A type that can be used to index into a Row or Statement.

The get and try_get methods of Row accept any type that implements ColumnIndex. This trait is implemented for strings which are used to look up a column by name, and for usize which is used as a positional index into the row.

This trait is sealed and cannot be implemented for types outside of SQLx.

Required Methods§

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fn index(&self, container: &T) -> Result<usize, Error>

Returns a valid positional index into the row or statement, ColumnIndexOutOfBounds, or, ColumnNotFound.

Implementations on Foreign Types§

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impl ColumnIndex<MySqlRow> for &str

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fn index(&self, row: &MySqlRow) -> Result<usize, Error>

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impl ColumnIndex<MySqlRow> for usize

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fn index(&self, row: &MySqlRow) -> Result<usize, Error>

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impl ColumnIndex<MySqlStatement<'_>> for &str

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fn index(&self, statement: &MySqlStatement<'_>) -> Result<usize, Error>

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impl ColumnIndex<MySqlStatement<'_>> for usize

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fn index(&self, statement: &MySqlStatement<'_>) -> Result<usize, Error>

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impl<T: ?Sized, I: ColumnIndex<T> + ?Sized> ColumnIndex<T> for &I

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fn index(&self, row: &T) -> Result<usize, Error>

Implementors§