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
Maps F to Alias<S>
The return type of
lhs.and(rhs)
postgres_backendThe return type of lsh.and(rhs) for network types
postgres_backendThe return type of lhs.contains(rhs)
for array expressions
postgres_backendThe return type of lhs.index(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
Represents the return type of .as_select()
The return type of
expr.asc()
The return type of
expr.assume_not_null()
postgres_backendThe return type of expr.at_time_zone(tz)
Represents the return type of diesel::select(selection)
The return type of
lhs.between(lower, upper)
The return type of
lhs.concat(rhs)
postgres_backendThe return type of lhs.remove_by_path(rhs)
postgres_backendThe return type of lsh.concat(rhs)
postgres_backendThe return type of lsh.contains(rhs)
for jsonb types
postgres_backendThe return type of lhs.contains(rhs)
for network types
postgres_backendThe return type of lhs.contains_or_eq(rhs)
The return type of
expr.desc()
postgres_backendThe return type of lsh.diff(rhs)
Represents the return type of .distinct()
postgres_backendRepresents the return type of .distinct_on(expr)
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 .except(rhs)
Represents the return type of .except_all(rhs)
Represents the return type of .filter(predicate)
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()
Represents the return type of .group_by(expr)
The return type of
lhs.gt(rhs)
The return type of
lhs.ge(rhs)
postgres_backendThe return type of lsh.has_all_keys(rhs)
postgres_backendThe return type of lsh.has_any_key(rhs)
postgres_backendThe return type of lsh.has_key(rhs)
Represents the return type of .having(predicate)
postgres_backendThe return type of lhs.ilike(rhs)
Represents the return type of .inner_join(rhs)
Represents the return type of .inner_join(rhs.on(on))
A query source representing the inner join between two tables.
For example, for the inner join between three tables that implement JoinTo:
InnerJoinQuerySource<InnerJoinQuerySource<table1, table2>, table3>
Which conveniently lets you omit the exact join condition.
Represents the return type of .intersect(rhs)
Represents the return type of .intersect_all(rhs)
Represents the return type of .into_boxed::<'a, DB>()
sqliteThe return type of lhs.is(rhs).
postgres_backendThe return type of lhs.is_contained_by(rhs)
postgres_backendThe return type of lsh.is_contained_by(rhs)
for jsonb types
postgres_backendThe return type of [lhs.is_contained_by(rhs)]((super::expression_methods::PgNetExpressionMethods::is_contained_by)
for network types
postgres_backendThe return type of lhs.is_contained_by_or_eq(rhs)
postgres_backendThe return type of lhs.is_distinct_from(rhs)
sqliteThe return type of lhs.is_not(rhs).
postgres_backendThe return type of lhs.is_not_distinct_from(rhs)
The return type of
expr.is_not_null()
The return type of
expr.is_null()
Represents the return type of .left_join(rhs)
Represents the return type of .left_join(rhs.on(on))
A query source representing the left outer join between two tables.
For example, for the left join between three tables that implement JoinTo:
LeftJoinQuerySource<LeftJoinQuerySource<table1, table2>, table3>
Which conveniently lets you omit the exact join condition.
The return type of
lhs.like(rhs)
postgres_backendThe return type of lhs.remove_by_path(rhs)
The return type of
lhs.lt(rhs)
The return type of
lhs.le(rhs)
The return type of
lhs.ne_all(rhs)
Represents the return type of .no_wait()
The return type of
lhs.not_between(lower, upper)
The return type of
lhs.ne(rhs)
postgres_backendThe return type of lhs.not_ilike(rhs)
The return type of
lhs.not_like(rhs)
postgres_backendThe return type of lhs.remove_by_path(rhs)
postgres_backendThe return type of lhs.not_similar_to(rhs)
The return type of
expr.nullable()
Represents the return type of .nullable()
postgres_backendThe return type of expr.nulls_first()
postgres_backendThe return type of expr.nulls_last()
Represents the return type of rhs.on(on)
The return type of
lhs.or(rhs)
Represents the return type of .or_filter(predicate)
postgres_backendThe return type of lsh.or(rhs) for network types
Represents the return type of .order(ordering)
postgres_backendThe return type of lhs.overlaps_with(rhs)
postgres_backendThe return type of lhs.overlaps_with(rhs)
for network types
postgres_backendThe return type of lhs.contains(rhs)
for range expressions
postgres_backendThe return type of lhs.remove_by_path(rhs)
postgres_backendThe return type of lhs.remove(rhs)
postgres_backendThe return type of lhs.retrieve_as_object(rhs)
postgres_backendThe return type of lhs.retrieve_as_text(rhs)
postgres_backendThe return type of lhs.retrieve_by_path_as_object(rhs)
postgres_backendThe return type of lhs.retrieve_by_path_as_text(rhs)
Represents the return type of .select(selection)
postgres_backendThe return type of lhs.similar_to(rhs)
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 .union(rhs)
Represents the return type of .union_all(rhs)
Represents the return type of update(lhs).set(rhs)
The return type of exists(expr)