Enum Filter 

pub enum Filter {
    Eq {
        field: String,
        value: Value,
    },
    In {
        field: String,
        values: Vec<Value>,
    },
    Range {
        field: String,
        gt: Option<f64>,
        gte: Option<f64>,
        lt: Option<f64>,
        lte: Option<f64>,
    },
    And(Vec<Filter>),
}

Metadata predicate applied during search.

Fields are addressed by dotted paths ("source.lang"). A record without the field never matches.

Variants

Eq

Fields

field: String

value: Value

In

Fields

field: String

values: Vec<Value>

Range

Fields

field: String

gt: Option<f64>

gte: Option<f64>

lt: Option<f64>

lte: Option<f64>

And(Vec<Filter>)

Implementations

impl Filter

pub fn eq(field: impl Into<String>, value: impl Into<Value>) -> Self

pub fn is_in( field: impl Into<String>, values: impl IntoIterator<Item = Value>, ) -> Self

pub fn between( field: impl Into<String>, gte: Option<f64>, lte: Option<f64>, ) -> Self

Inclusive range. Either bound may be omitted.

pub fn matches(&self, metadata: Option<&Value>) -> bool

pub fn from_json(value: &Value) -> Result<Self>

Parses a MongoDB-style filter:

{"lang": "en", "year": {"$gte": 2020, "$lt": 2025}, "tag": {"$in": ["a", "b"]}}

Top-level keys are combined with AND. Supported operators: $eq, $in, $gt, $gte, $lt, $lte.

Trait Implementations

impl Clone for Filter

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 Filter

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

Formats the value using the given formatter.

impl PartialEq for Filter

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for Filter