Trait diesel::query_dsl::methods::SingleValueDsl

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pub trait SingleValueDsl {
    type Output;

    // Required method
    fn single_value(self) -> Self::Output;
}

Expand description

The single_value method

This trait should not be relied on directly by most apps. Its behavior is provided by QueryDsl. However, you may need a where clause on this trait to call single_value from generic code.

Required Associated Types§

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type Output

The type returned by .single_value.

Required Methods§

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fn single_value(self) -> Self::Output

See the trait documentation.

Implementors§

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impl<T> SingleValueDsl for T
where Self: SelectQuery + LimitDsl, <Self as SelectQuery>::SqlType: IntoNullable,