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)AndNet
postgres_backendThe return type of
lsh.and(rhs) for network typesArrayContains
postgres_backendThe return type of
lhs.contains(rhs)
for array expressionsArrayIndex
postgres_backendThe return type of
lhs.index(rhs)The type of
Item when converted to an expression with the same type as TargetExprThe type of
Item when converted to an expression of TypeRepresents the return type of
.as_select()The return type of
expr.asc()The return type of
expr.assume_not_null()AtTimeZone
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)ConcatBinary
postgres_backendThe return type of
lhs.remove_by_path(rhs)ConcatJsonb
postgres_backendThe return type of
lsh.concat(rhs)ContainsJsonb
postgres_backendThe return type of
lsh.contains(rhs)
for jsonb typesContainsNet
postgres_backendThe return type of
lhs.contains(rhs)
for network typesContainsNetLoose
postgres_backendThe return type of
lhs.contains_or_eq(rhs)The return type of
expr.desc()DifferenceNet
postgres_backendThe return type of
lsh.diff(rhs)Represents the return type of
.distinct()DistinctOn
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)HasAllKeysJsonb
postgres_backendThe return type of
lsh.has_all_keys(rhs)HasAnyKeyJsonb
postgres_backendThe return type of
lsh.has_any_key(rhs)HasKeyJsonb
postgres_backendThe return type of
lsh.has_key(rhs)Represents the return type of
.having(predicate)ILike
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>()Is
sqliteThe return type of
lhs.is(rhs).IsContainedBy
postgres_backendThe return type of
lhs.is_contained_by(rhs)IsContainedByJsonb
postgres_backendThe return type of
lsh.is_contained_by(rhs)
for jsonb typesIsContainedByNet
postgres_backendThe return type of [
lhs.is_contained_by(rhs)]((super::expression_methods::PgNetExpressionMethods::is_contained_by)
for network typesIsContainedByNetLoose
postgres_backendThe return type of
lhs.is_contained_by_or_eq(rhs)IsDistinctFrom
postgres_backendThe return type of
lhs.is_distinct_from(rhs)IsNot
sqliteThe return type of
lhs.is_not(rhs).IsNotDistinctFrom
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)LikeBinary
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)NotILike
postgres_backendThe return type of
lhs.not_ilike(rhs)The return type of
lhs.not_like(rhs)NotLikeBinary
postgres_backendThe return type of
lhs.remove_by_path(rhs)NotSimilarTo
postgres_backendThe return type of
lhs.not_similar_to(rhs)The return type of
expr.nullable()Represents the return type of
.nullable()NullsFirst
postgres_backendThe return type of
expr.nulls_first()NullsLast
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)OrNet
postgres_backendThe return type of
lsh.or(rhs) for network typesRepresents the return type of
.order(ordering)OverlapsWith
postgres_backendThe return type of
lhs.overlaps_with(rhs)OverlapsWithNet
postgres_backendThe return type of
lhs.overlaps_with(rhs)
for network typesRangeContains
postgres_backendThe return type of
lhs.contains(rhs)
for range expressionsRemoveByPathFromJsonb
postgres_backendThe return type of
lhs.remove_by_path(rhs)RemoveFromJsonb
postgres_backendThe return type of
lhs.remove(rhs)RetrieveAsObjectJson
postgres_backendThe return type of
lhs.retrieve_as_object(rhs)RetrieveAsTextJson
postgres_backendThe return type of
lhs.retrieve_as_text(rhs)RetrieveByPathAsObjectJson
postgres_backendThe return type of
lhs.retrieve_by_path_as_object(rhs)RetrieveByPathAsTextJson
postgres_backendThe return type of
lhs.retrieve_by_path_as_text(rhs)Represents the return type of
.select(selection)SimilarTo
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)