Expand description
Provide helper types for concisely writing the return type of functions. As with iterators, it is unfortunately difficult to return a partially constructed query without exposing the exact implementation of the function. Without higher kinded types, these various DSLs can’t be combined into a single trait for boxing purposes.
All types here are in the form <FirstType as DslName<OtherTypes>>::Output. So the return type of
users.filter(first_name.eq("John")).order(last_name.asc()).limit(10) would
be Limit<Order<FindBy<users, first_name, &str>, Asc<last_name>>>
Type Aliases§
- And
- The return type of
lhs.and(rhs) - AsExpr
- The type of
Itemwhen converted to an expression with the same type asTargetExpr - AsExpr
Of - The type of
Itemwhen converted to an expression ofType - Asc
- The return type of
expr.asc() - Between
- The return type of
lhs.between(lower, upper) - Desc
- The return type of
expr.desc() - Distinct
- Represents the return type of
.distinct() - Distinct
On - Represents the return type of
.distinct_on(expr) - Eq
- The return type of
lhs.eq(rhs) - EqAny
- The return type of
lhs.eq_any(rhs) - Escape
- The return type of
lhs.escape('x') - Filter
- Represents the return type of
.filter(predicate) - Find
- Represents the return type of
.find(pk) - FindBy
- Represents the return type of
.filter(lhs.eq(rhs)) - ForKey
Share - Represents the return type of
.for_key_share() - ForNo
KeyUpdate - Represents the return type of
.for_no_key_update() - ForShare
- Represents the return type of
.for_share() - ForUpdate
- Represents the return type of
.for_update() - Gt
- The return type of
lhs.gt(rhs) - GtEq
- The return type of
lhs.ge(rhs) - Inner
Join - Represents the return type of
.inner_join(rhs) - Into
Boxed - Represents the return type of
.into_boxed::<'a, DB>() - IsNot
Null - The return type of
expr.is_not_null() - IsNull
- The return type of
expr.is_null() - Left
Join - Represents the return type of
.left_join(rhs) - Like
- The return type of
lhs.like(rhs) - Limit
- Represents the return type of
.limit() - Lt
- The return type of
lhs.lt(rhs) - LtEq
- The return type of
lhs.le(rhs) - NeAny
- The return type of
lhs.ne_any(rhs) - NoWait
- Represents the return type of
.no_wait() - Not
Deprecated - The return type of
not(expr) - NotBetween
- The return type of
lhs.not_between(lower, upper) - NotEq
- The return type of
lhs.ne(rhs) - NotLike
- The return type of
lhs.not_like(rhs) - Nullable
- The return type of
expr.nullable() - Nullable
Select - Represents the return type of
.nullable() - Offset
- Represents the return type of
.offset() - Or
- The return type of
lhs.or(rhs) - OrFilter
- Represents the return type of
.or_filter(predicate) - Order
- Represents the return type of
.order(ordering) - Select
- Represents the return type of
.select(selection) - Single
Value - Represents the return type of
.single_value() - Skip
Locked - Represents the return type of
.skip_locked() - SqlType
Of - The SQL type of an expression
- Then
Order By - Represents the return type of
.then_order_by(ordering) - Update
- Represents the return type of
update(lhs).set(rhs) - avg
- The return type of
avg(expr) - max
- The return type of
max(expr) - min
- The return type of
min(expr) - not
- The return type of
not(expr) - sum
- The return type of
sum(expr)