Struct DataProjection 

pub struct DataProjection(pub Map<String, Value>);

Mongo data query projection

Tuple Fields

0: Map<String, Value>

Methods from Deref<Target = Map<String, Value>>

pub fn get<Q>(&self, key: &Q) -> Option<&Value>

where String: Borrow<Q>, Q: Ord + Eq + Hash + ?Sized,

Returns a reference to the value corresponding to the key.

The key may be any borrowed form of the map’s key type, but the ordering on the borrowed form must match the ordering on the key type.

pub fn contains_key<Q>(&self, key: &Q) -> bool

where String: Borrow<Q>, Q: Ord + Eq + Hash + ?Sized,

Returns true if the map contains a value for the specified key.

The key may be any borrowed form of the map’s key type, but the ordering on the borrowed form must match the ordering on the key type.

pub fn get_key_value<Q>(&self, key: &Q) -> Option<(&String, &Value)>

where String: Borrow<Q>, Q: Ord + Eq + Hash + ?Sized,

Returns the key-value pair matching the given key.

The key may be any borrowed form of the map’s key type, but the ordering on the borrowed form must match the ordering on the key type.

pub fn len(&self) -> usize

Returns the number of elements in the map.

pub fn is_empty(&self) -> bool

Returns true if the map contains no elements.

pub fn iter(&self) -> Iter<'_>

Gets an iterator over the entries of the map.

pub fn keys(&self) -> Keys<'_>

Gets an iterator over the keys of the map.

pub fn values(&self) -> Values<'_>

Gets an iterator over the values of the map.

Trait Implementations

impl Clone for DataProjection

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for DataProjection

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Deref for DataProjection

type Target = Map<String, Value>

The resulting type after dereferencing.

fn deref(&self) -> &Map<String, Value>

Dereferences the value.

impl<'de> Deserialize<'de> for DataProjection

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl From<&DataProjection> for DataProjection

fn from(value: &DataProjection) -> Self

Converts to this type from the input type.

impl From<DataProjection> for Map<String, Value>

fn from(value: DataProjection) -> Self

Converts to this type from the input type.

impl From<Map<String, Value>> for DataProjection

fn from(value: Map<String, Value>) -> Self

Converts to this type from the input type.

impl Into<DataProjection> for DataProjection

fn into(self) -> DataProjection

Converts this type into the (usually inferred) input type.

impl Into<DataProjection> for Value

fn into(self) -> DataProjection

Converts this type into the (usually inferred) input type.

impl Serialize for DataProjection

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.