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) - AndNet
postgres_backendThe return type oflsh.and(rhs)for network types - Array
Contains Deprecated postgres_backend - Array
Index Deprecated postgres_backend - 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() - AtTime
Zone postgres_backendThe return type ofexpr.at_time_zone(tz) - The return type of
lhs.between(lower, upper) - The return type of
lhs.concat(rhs) - Concat
Array Deprecated postgres_backend - Concat
Binary Deprecated postgres_backend - Concat
Jsonb Deprecated postgres_backend - Contains
postgres_backendThe return type oflhs.contains(rhs)for array expressions - Contains
Jsonb Deprecated postgres_backend - Contains
Net postgres_backendThe return type oflhs.contains(rhs)for network types - Contains
NetLoose postgres_backendThe return type oflhs.contains_or_eq(rhs) - Contains
OrEq postgres_backend - The return type of
expr.desc() - Diff
postgres_backend - Difference
Net postgres_backendThe return type oflsh.diff(rhs) - Represents the return type of
.distinct() - Distinct
On 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) - The return type of
alias.field(field) - The return type of
alias.fields(fields) - 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) - HasAll
Keys postgres_backend - HasAll
Keys Jsonb postgres_backendThe return type oflsh.has_all_keys(rhs) - HasAny
Key postgres_backend - HasAny
KeyJsonb postgres_backendThe return type oflsh.has_any_key(rhs) - HasKey
postgres_backend - HasKey
Jsonb postgres_backendThe return type oflsh.has_key(rhs) - Represents the return type of
.having(predicate) - ILike
postgres_backendThe return type oflhs.ilike(rhs) - Ilike
postgres_backend - Index
postgres_backendThe return type oflhs.index(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.
- Represents the return type of
.intersect(rhs) - Represents the return type of
.intersect_all(rhs) - Represents the return type of
.into_boxed::<'a, DB>() - Represents the return type of
.into_sql() - Is
sqliteThe return type oflhs.is(rhs). - IsContained
By postgres_backendThe return type oflhs.is_contained_by(rhs) - IsContained
ByJsonb Deprecated postgres_backend - IsContained
ByNet postgres_backendThe return type of [lhs.is_contained_by(rhs)]((super::expression_methods::PgNetExpressionMethods::is_contained_by) for network types - IsContained
ByNet Loose postgres_backendThe return type oflhs.is_contained_by_or_eq(rhs) - IsContained
ByOr Eq postgres_backend - IsDistinct
From postgres_backendThe return type oflhs.is_distinct_from(rhs) - IsNot
sqliteThe return type oflhs.is_not(rhs). - IsNot
Distinct From postgres_backendThe return type oflhs.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.
- The return type of
lhs.like(rhs) - Like
Binary Deprecated postgres_backend - 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) - NotI
Like postgres_backendThe return type oflhs.not_ilike(rhs) - NotIlike
postgres_backend - The return type of
lhs.not_like(rhs) - NotLike
Binary Deprecated postgres_backend - NotSimilar
To postgres_backendThe return type oflhs.not_similar_to(rhs) - The return type of
expr.nullable() - Represents the return type of
.nullable() - Nulls
First postgres_backendThe return type ofexpr.nulls_first() - Nulls
Last postgres_backendThe return type ofexpr.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) - OrNet
postgres_backendThe return type oflsh.or(rhs)for network types - Represents the return type of
.order(ordering) - Represents the return type of
.order_by(ordering) - The return type of
case_when(...).otherwise(...) - Overlaps
With postgres_backendThe return type oflhs.overlaps_with(rhs) - Overlaps
With Net postgres_backendThe return type oflhs.overlaps_with(rhs)for network types - Range
Contains postgres_backendThe return type oflhs.contains(rhs)for range expressions - Remove
postgres_backend - Remove
ByPath postgres_backend - Remove
ByPath From Jsonb postgres_backendThe return type oflhs.remove_by_path(rhs) - Remove
From Jsonb postgres_backendThe return type oflhs.remove(rhs) - Retrieve
AsObject postgres_backend - Retrieve
AsObject Json postgres_backendThe return type oflhs.retrieve_as_object(rhs) - Retrieve
AsText postgres_backend - Retrieve
AsText Json postgres_backendThe return type oflhs.retrieve_as_text(rhs) - Retrieve
ByPath AsObject postgres_backend - Retrieve
ByPath AsObject Json postgres_backendThe return type oflhs.retrieve_by_path_as_object(rhs) - Retrieve
ByPath AsText postgres_backend - Retrieve
ByPath AsText Json postgres_backendThe return type oflhs.retrieve_by_path_as_text(rhs) - Represents the return type of
InsertStatement::returning,UpdateStatement::returningandDeleteStatement::returning - Represents the return type of
.select(selection) - Represents the return type of
UpdateStatement::set() - Similar
To postgres_backendThe return type oflhs.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) - Represents the return type of
IncompleteInsertStatement::values() - The return type of
case_when(...).when(...) - The return type of
avg(expr) - The return type of
case_when() - Represents the return type of
diesel::delete - The return type of
exists(expr) - Represents the return type of
diesel::insert_into - Represents the return type of
diesel::insert_or_ignore_into - The return type of
max(expr) - The return type of
min(expr) - The return type of
not(expr) - Represents the return type of
diesel::replace_into - Represents the return type of
diesel::select(selection) - The return type of
sum(expr)