Struct diesel::query_source::AliasedField

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pub struct AliasedField<S, F> { /* private fields */ }
Expand description

Represents an aliased field (column) within diesel’s query builder

See alias! for more details.

Trait Implementations§

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impl<S: Clone, F: Clone> Clone for AliasedField<S, F>

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fn clone(&self) -> AliasedField<S, F>

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<S: Debug, F: Debug> Debug for AliasedField<S, F>

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl<S, C> Expression for AliasedField<S, C>where S: AliasSource, C: Column<Table = S::Target> + Expression,

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type SqlType = <C as Expression>::SqlType

The type that this expression represents in SQL
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impl<S, C> QueryId for AliasedField<S, C>where S: AliasSource + 'static, S::Target: 'static, C: Column<Table = S::Target> + 'static + QueryId,

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type QueryId = AliasedField<S, C>

A type which uniquely represents Self in a SQL query. Read more
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const HAS_STATIC_QUERY_ID: bool = <C as QueryId>::HAS_STATIC_QUERY_ID

Can the SQL generated by Self be uniquely identified by its type? Read more
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fn query_id() -> Option<TypeId>

Returns the type id of Self::QueryId if Self::HAS_STATIC_QUERY_ID. Returns None otherwise. Read more
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impl<S, C> ValidGrouping<()> for AliasedField<S, C>where S: AliasSource, C: Column<Table = S::Target>,

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type IsAggregate = No

Is this expression aggregate? Read more
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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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type IsAggregate = Yes

Is this expression aggregate? Read more
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impl<QS, S, C> AppearsOnTable<QS> for AliasedField<S, C>where S: AliasSource, QS: AppearsInFromClause<Alias<S>, Count = Once>, C: Column<Table = S::Target>,

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impl<S: Copy, F: Copy> Copy for AliasedField<S, F>

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impl<S, C> SelectableExpression<Alias<S>> for AliasedField<S, C>where S: AliasSource, C: Column<Table = S::Target>, Self: AppearsOnTable<Alias<S>>,

Auto Trait Implementations§

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impl<S, F> RefUnwindSafe for AliasedField<S, F>where F: RefUnwindSafe, S: RefUnwindSafe,

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impl<S, F> Send for AliasedField<S, F>where F: Send, S: Send,

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impl<S, F> Sync for AliasedField<S, F>where F: Sync, S: Sync,

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impl<S, F> Unpin for AliasedField<S, F>where F: Unpin, S: Unpin,

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impl<S, F> UnwindSafe for AliasedField<S, F>where F: UnwindSafe, S: UnwindSafe,

Blanket Implementations§

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impl<T> Any for Twhere T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T, ST> AsExpression<ST> for Twhere T: Expression<SqlType = ST>, ST: SqlType + TypedExpressionType,

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type Expression = T

The expression being returned
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fn as_expression(self) -> T

Perform the conversion
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impl<T> Borrow<T> for Twhere T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for Twhere T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<Conn, DB, T> ExecuteDsl<Conn, DB> for Twhere Conn: Connection<Backend = DB>, DB: Backend, T: QueryFragment<DB, NotSpecialized> + QueryId,

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fn execute(query: T, conn: &mut Conn) -> Result<usize, Error>

Execute this command
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for Twhere U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> IntoSql for T

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fn into_sql<T>(self) -> AsExprOf<Self, T>where Self: AsExpression<T> + Sized, T: SqlType + TypedExpressionType,

Convert self to an expression for Diesel’s query builder. Read more
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fn as_sql<'a, T>(&'a self) -> AsExprOf<&'a Self, T>where &'a Self: AsExpression<T>, T: SqlType + TypedExpressionType,

Convert &self to an expression for Diesel’s query builder. Read more
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impl<T> NullableExpressionMethods for Twhere T: Expression,

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fn nullable(self) -> Nullable<Self>

Converts this potentially non-null expression into one which is treated as nullable. This method has no impact on the generated SQL, and is only used to allow certain comparisons that would otherwise fail to compile. Read more
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fn assume_not_null(self) -> AssumeNotNull<Self>

Converts this potentially nullable expression into one which will be assumed to be not-null. This method has no impact on the generated SQL, however it will enable you to attempt deserialization of the returned value in a non-Option. Read more
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impl<T> ToOwned for Twhere T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for Twhere U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.