Module diesel::helper_types
source · [−]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 Definitions
The return type of
lhs.and(rhs)
The type of Item when converted to an expression with the same type as TargetExpr
The type of Item when converted to an expression of Type
The return type of
expr.asc()
The return type of
lhs.between(lower, upper)
The return type of
expr.desc()
Represents the return type of .distinct()
The return type of
lhs.eq(rhs)
The return type of
lhs.eq_any(rhs)
The return type of
lhs.escape('x')
Represents the return type of .filter(predicate)
Represents the return type of .find(pk)
Represents the return type of .filter(lhs.eq(rhs))
Represents the return type of .for_key_share()
Represents the return type of .for_no_key_update()
Represents the return type of .for_share()
Represents the return type of .for_update()
The return type of
lhs.gt(rhs)
The return type of
lhs.ge(rhs)
Represents the return type of .inner_join(rhs)
Represents the return type of .into_boxed::<'a, DB>()
The return type of
expr.is_not_null()
The return type of
expr.is_null()
Represents the return type of .left_join(rhs)
The return type of
lhs.like(rhs)
Represents the return type of .limit()
The return type of
lhs.lt(rhs)
The return type of
lhs.le(rhs)
The return type of
lhs.ne_any(rhs)
Represents the return type of .no_wait()
The return type of not(expr)
The return type of
lhs.not_between(lower, upper)
The return type of
lhs.ne(rhs)
The return type of
lhs.not_like(rhs)
The return type of
expr.nullable()
Represents the return type of .nullable()
Represents the return type of .offset()
The return type of
lhs.or(rhs)
Represents the return type of .or_filter(predicate)
Represents the return type of .order(ordering)
Represents the return type of .select(selection)
Represents the return type of .single_value()
Represents the return type of .skip_locked()
The SQL type of an expression
Represents the return type of .then_order_by(ordering)
Represents the return type of update(lhs).set(rhs)