Enum ComputedExpression 

pub enum ComputedExpression {
    Concat(Vec<String>),
    Sum(Vec<String>),
    Product(Vec<String>),
    Average(Vec<String>),
    Custom(String),
}

Computation expression for a field

Variants

Concat(Vec<String>)

Concatenate string fields

Sum(Vec<String>)

Sum numeric fields

Product(Vec<String>)

Multiply numeric fields

Average(Vec<String>)

Average numeric fields

Custom(String)

JavaScript-like custom expression (field name -> value extraction)

Implementations

impl ComputedExpression

pub fn evaluate(&self, doc: &Document) -> Option<Value>

Evaluate the expression against a document

Trait Implementations

impl Clone for ComputedExpression

fn clone(&self) -> ComputedExpression

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ComputedExpression

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for ComputedExpression

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for ComputedExpression

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

where __S: Serializer,

Serialize this value into the given Serde serializer.