pub struct UniqueValue;
Trait Implementations
type Collection = Unique
type Collection = Unique
The collection this view belongs to
type View = UniqueValue
type View = UniqueValue
The view this schema is defined for.
If true, no two documents may emit the same key. Unique views are
updated when the document is saved, allowing for this check to be done
atomically. When a document is updated, all unique views will be
updated, and if any of them fail, the document will not be allowed to
update and an
Error::UniqueKeyViolation
will be
returned. Read more
pub fn map(
&self,
document: &BorrowedDocument<'_>
) -> Result<Mappings<<<UniqueValue as ViewSchema>::View as View>::Key, <<UniqueValue as ViewSchema>::View as View>::Value>, Error>
pub fn map(
&self,
document: &BorrowedDocument<'_>
) -> Result<Mappings<<<UniqueValue as ViewSchema>::View as View>::Key, <<UniqueValue as ViewSchema>::View as View>::Value>, Error>
The map function for this view. This function is responsible for emitting entries for any documents that should be contained in this View. If None is returned, the View will not include the document. See the user guide’s chapter on views for more information on how map works. Read more
The version of the view. Changing this value will cause indexes to be rebuilt.
Returns a value that is produced by reducing a list of mappings
into a
single value. If rereduce
is true, the values contained in the
mappings have already been reduced at least one time. If an error of
ReduceUnimplemented
is returned,
queries that ask for a reduce operation will return an error. See the
user guide’s chapter on views for more information on how reduce
works. Read more
Auto Trait Implementations
impl RefUnwindSafe for UniqueValue
impl Send for UniqueValue
impl Sync for UniqueValue
impl Unpin for UniqueValue
impl UnwindSafe for UniqueValue
Blanket Implementations
Mutably borrows from an owned value. Read more
pub fn vzip(self) -> V
Attaches the provided Subscriber
to this type, returning a
WithDispatch
wrapper. Read more
Attaches the current default Subscriber
to this type, returning a
WithDispatch
wrapper. Read more