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 Aliases§
- Maps
FtoAlias<S> - The return type of
lhs.and(rhs) - The return type of
lsh.and(rhs)for network types - The return type of
lhs.contains(rhs)for array expressions - The return type of
lhs.index(rhs) - The type of
Itemwhen converted to an expression with the same type asTargetExpr - The type of
Itemwhen converted to an expression ofType - Represents the return type of
.as_select() - The return type of
expr.asc() - The return type of
expr.assume_not_null() - The 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) - The return type of
lhs.remove_by_path(rhs) - The return type of
lsh.concat(rhs) - The return type of
lsh.contains(rhs)for jsonb types - The return type of
lhs.contains(rhs)for network types - The return type of
lhs.contains_or_eq(rhs) - The return type of
expr.desc() - The return type of
lsh.diff(rhs) - Represents the return type of
.distinct() - Represents 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
.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() - Represents the return type of
.group_by(expr) - The return type of
lhs.gt(rhs) - The return type of
lhs.ge(rhs) - The return type of
lsh.has_all_keys(rhs) - The return type of
lsh.has_any_key(rhs) - The return type of
lsh.has_key(rhs) - Represents the return type of
.having(predicate) - The 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>() - The return type of
lhs.is_contained_by(rhs) - The return type of
lsh.is_contained_by(rhs)for jsonb types - The return type of [
lhs.is_contained_by(rhs)]((super::expression_methods::PgNetExpressionMethods::is_contained_by) for network types - The return type of
lhs.is_contained_by_or_eq(rhs) - The return type of
lhs.is_distinct_from(rhs) - The 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) - The return type of
lhs.remove_by_path(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_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) - The return type of
lhs.not_ilike(rhs) - The return type of
lhs.not_like(rhs) - The return type of
lhs.remove_by_path(rhs) - The return type of
lhs.not_similar_to(rhs) - The return type of
expr.nullable() - Represents the return type of
.nullable() - The return type of
expr.nulls_first() - The return type of
expr.nulls_last() - Represents the return type of
.offset() - Represents the return type of
rhs.on(on) - The return type of
lhs.or(rhs) - Represents the return type of
.or_filter(predicate) - The return type of
lsh.or(rhs)for network types - Represents the return type of
.order(ordering) - The return type of
lhs.overlaps_with(rhs) - The return type of
lhs.overlaps_with(rhs)for network types - The return type of
lhs.contains(rhs)for range expressions - The return type of
lhs.remove_by_path(rhs) - The return type of
lhs.remove(rhs) - The return type of
lhs.retrieve_as_object(rhs) - The return type of
lhs.retrieve_as_text(rhs) - The return type of
lhs.retrieve_by_path_as_object(rhs) - The return type of
lhs.retrieve_by_path_as_text(rhs) - Represents the return type of
.select(selection) - The 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
avg(expr) - The return type of
exists(expr) - The return type of
max(expr) - The return type of
min(expr) - The return type of
not(expr) - The return type of
sum(expr)