Enum MappedSelectExecutor 

pub enum MappedSelectExecutor<'a, T: Model, V> {
    Sqlite(MappedSelectExecutor<'a, T, V>),
    PostgreSQL(MappedSelectExecutor<'a, T, V>),
    MySQL(MappedSelectExecutor<'a, T, V>),
    MSSQL(MappedSelectExecutor<'a, T, V>),
}

统一的 MappedSelectExecutor 枚举

Variants

Sqlite(MappedSelectExecutor<'a, T, V>)

PostgreSQL(MappedSelectExecutor<'a, T, V>)

MySQL(MappedSelectExecutor<'a, T, V>)

MSSQL(MappedSelectExecutor<'a, T, V>)

Implementations

impl<'a, T: Model, V> MappedSelectExecutor<'a, T, V>

pub fn collect<C>(self) -> MappedCollectFuture<'a, T, V, C>

where T: 'static, V: FromRowValues + 'static, C: FromIterator<V> + 'static,

pub fn collect_with<C, F, M>( self, f: F, ) -> ModelCollectWithFuture<'a, T, V, C, M, F>

where T: 'static, V: FromRowValues + 'static, C: FromIterator<M> + 'static, F: Fn(V) -> M + Clone + 'static, M: 'static,

执行查询并收集结果，同时应用转换函数 用于将查询结果转换为其他类型（如Model） 示例：collect_with(|v| Uids { id: v })

Trait Implementations

impl<'a, T: Model, V> Clone for MappedSelectExecutor<'a, T, V>

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<'a, 'b, T: Model, V: ColumnValueType> IsInValues<V> for &'b MappedSelectExecutor<'a, T, V>

fn to_in_expr(self, column: String) -> WhereExpr

impl<'a, T: Model, V: ColumnValueType> IsInValues<V> for MappedSelectExecutor<'a, T, V>

fn to_in_expr(self, column: String) -> WhereExpr

impl<'a, T: Model, V> Subquery for MappedSelectExecutor<'a, T, V>

fn to_subquery_sql(&self) -> (String, Vec<Value>)

获取子查询的 SQL 和参数