Trait diesel::expression::ValidGrouping

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pub trait ValidGrouping<GroupByClause> {
    type IsAggregate;
}
Expand description

Is this expression valid for a given group by clause?

Implementations of this trait must ensure that aggregate expressions are not mixed with non-aggregate expressions.

For generic types, you can determine if your sub-expressions can appear together using the MixedAggregates trait.

GroupByClause will be a tuple containing the set of expressions appearing in the GROUP BY portion of the query. If there is no GROUP BY, it will be ().

This trait can be derived

Required Associated Types§

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type IsAggregate

Is this expression aggregate?

This type should always be one of the structs in the is_aggregate module. See the documentation of those structs for more details.

Implementations on Foreign Types§

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impl<'a, T: ValidGrouping<GB> + ?Sized, GB> ValidGrouping<GB> for &'a T

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impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30, T31, __GroupByClause> ValidGrouping<__GroupByClause> for (T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30, T31)

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impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30, __GroupByClause> ValidGrouping<__GroupByClause> for (T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30)

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impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, __GroupByClause> ValidGrouping<__GroupByClause> for (T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29)

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impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, __GroupByClause> ValidGrouping<__GroupByClause> for (T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28)

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impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, __GroupByClause> ValidGrouping<__GroupByClause> for (T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27)

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impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, __GroupByClause> ValidGrouping<__GroupByClause> for (T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26)

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impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, __GroupByClause> ValidGrouping<__GroupByClause> for (T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25)

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impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, __GroupByClause> ValidGrouping<__GroupByClause> for (T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24)

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impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, __GroupByClause> ValidGrouping<__GroupByClause> for (T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23)

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impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, __GroupByClause> ValidGrouping<__GroupByClause> for (T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, T22)

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impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, __GroupByClause> ValidGrouping<__GroupByClause> for (T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, T21)

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impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, __GroupByClause> ValidGrouping<__GroupByClause> for (T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20)

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impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, __GroupByClause> ValidGrouping<__GroupByClause> for (T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19)

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impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, __GroupByClause> ValidGrouping<__GroupByClause> for (T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18)

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impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, __GroupByClause> ValidGrouping<__GroupByClause> for (T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17)

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impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, __GroupByClause> ValidGrouping<__GroupByClause> for (T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16)

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impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, __GroupByClause> ValidGrouping<__GroupByClause> for (T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15)

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impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, __GroupByClause> ValidGrouping<__GroupByClause> for (T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14)

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impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, __GroupByClause> ValidGrouping<__GroupByClause> for (T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13)

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impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, __GroupByClause> ValidGrouping<__GroupByClause> for (T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12)

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impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, __GroupByClause> ValidGrouping<__GroupByClause> for (T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11)

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impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, __GroupByClause> ValidGrouping<__GroupByClause> for (T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10)

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impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, __GroupByClause> ValidGrouping<__GroupByClause> for (T0, T1, T2, T3, T4, T5, T6, T7, T8, T9)

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impl<T0, T1, T2, T3, T4, T5, T6, T7, T8, __GroupByClause> ValidGrouping<__GroupByClause> for (T0, T1, T2, T3, T4, T5, T6, T7, T8)

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impl<T0, T1, T2, T3, T4, T5, T6, T7, __GroupByClause> ValidGrouping<__GroupByClause> for (T0, T1, T2, T3, T4, T5, T6, T7)

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impl<T0, T1, T2, T3, T4, T5, T6, __GroupByClause> ValidGrouping<__GroupByClause> for (T0, T1, T2, T3, T4, T5, T6)
where T0: ValidGrouping<__GroupByClause>, (T1, T2, T3, T4, T5, T6): ValidGrouping<__GroupByClause>, T0::IsAggregate: MixedAggregates<<(T1, T2, T3, T4, T5, T6) as ValidGrouping<__GroupByClause>>::IsAggregate>,

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impl<T0, T1, T2, T3, T4, T5, __GroupByClause> ValidGrouping<__GroupByClause> for (T0, T1, T2, T3, T4, T5)
where T0: ValidGrouping<__GroupByClause>, (T1, T2, T3, T4, T5): ValidGrouping<__GroupByClause>, T0::IsAggregate: MixedAggregates<<(T1, T2, T3, T4, T5) as ValidGrouping<__GroupByClause>>::IsAggregate>,

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impl<T0, T1, T2, T3, T4, __GroupByClause> ValidGrouping<__GroupByClause> for (T0, T1, T2, T3, T4)
where T0: ValidGrouping<__GroupByClause>, (T1, T2, T3, T4): ValidGrouping<__GroupByClause>, T0::IsAggregate: MixedAggregates<<(T1, T2, T3, T4) as ValidGrouping<__GroupByClause>>::IsAggregate>,

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type IsAggregate = <<T0 as ValidGrouping<__GroupByClause>>::IsAggregate as MixedAggregates<<(T1, T2, T3, T4) as ValidGrouping<__GroupByClause>>::IsAggregate>>::Output

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impl<T0, T1, T2, T3, __GroupByClause> ValidGrouping<__GroupByClause> for (T0, T1, T2, T3)
where T0: ValidGrouping<__GroupByClause>, (T1, T2, T3): ValidGrouping<__GroupByClause>, T0::IsAggregate: MixedAggregates<<(T1, T2, T3) as ValidGrouping<__GroupByClause>>::IsAggregate>,

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type IsAggregate = <<T0 as ValidGrouping<__GroupByClause>>::IsAggregate as MixedAggregates<<(T1, T2, T3) as ValidGrouping<__GroupByClause>>::IsAggregate>>::Output

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impl<T0, T1, T2, __GroupByClause> ValidGrouping<__GroupByClause> for (T0, T1, T2)
where T0: ValidGrouping<__GroupByClause>, (T1, T2): ValidGrouping<__GroupByClause>, T0::IsAggregate: MixedAggregates<<(T1, T2) as ValidGrouping<__GroupByClause>>::IsAggregate>,

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type IsAggregate = <<T0 as ValidGrouping<__GroupByClause>>::IsAggregate as MixedAggregates<<(T1, T2) as ValidGrouping<__GroupByClause>>::IsAggregate>>::Output

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impl<T0, T1, __GroupByClause> ValidGrouping<__GroupByClause> for (T0, T1)
where T0: ValidGrouping<__GroupByClause>, (T1,): ValidGrouping<__GroupByClause>, T0::IsAggregate: MixedAggregates<<(T1,) as ValidGrouping<__GroupByClause>>::IsAggregate>,

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type IsAggregate = <<T0 as ValidGrouping<__GroupByClause>>::IsAggregate as MixedAggregates<<(T1,) as ValidGrouping<__GroupByClause>>::IsAggregate>>::Output

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impl<T0, __GroupByClause> ValidGrouping<__GroupByClause> for (T0,)
where T0: ValidGrouping<__GroupByClause>,

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type IsAggregate = <T0 as ValidGrouping<__GroupByClause>>::IsAggregate

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impl<T: ValidGrouping<GB> + ?Sized, GB> ValidGrouping<GB> for Box<T>

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impl<'a, QS, ST, DB, GB, IsAggregate> ValidGrouping<GB> for dyn BoxableExpression<QS, DB, GB, IsAggregate, SqlType = ST> + 'a

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type IsAggregate = IsAggregate

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impl<Query, Value, GB> ValidGrouping<GB> for UncheckedBind<Query, Value>

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impl<S, C1, C2> ValidGrouping<AliasedField<S, C1>> for AliasedField<S, C2>
where S: AliasSource, C1: Column<Table = S::Target>, C2: Column<Table = S::Target> + ValidGrouping<C1, IsAggregate = Yes>,

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impl<S, C> ValidGrouping<()> for AliasedField<S, C>
where S: AliasSource, C: Column<Table = S::Target>,

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impl<ST, T, GB> ValidGrouping<GB> for SqlLiteral<ST, T>

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impl<Whens, E, __GroupByClause> ValidGrouping<__GroupByClause> for CaseWhen<Whens, E>
where Whens: ValidGrouping<__GroupByClause>, E: ValidGrouping<__GroupByClause>, Whens::IsAggregate: MixedAggregates<E::IsAggregate>,

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type IsAggregate = <<Whens as ValidGrouping<__GroupByClause>>::IsAggregate as MixedAggregates<<E as ValidGrouping<__GroupByClause>>::IsAggregate>>::Output

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impl<__GroupByClause> ValidGrouping<__GroupByClause> for now

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impl<__GroupByClause> ValidGrouping<__GroupByClause> for today