Struct Field 

pub struct Field {
    pub field: FieldName,
    pub options: BTreeMap<String, GenericValue>,
    pub emit: bool,
    pub source: FieldSource,
}

One field of a document: a name, optional OpenSearch mapping options passed through to the index, and a source saying where its value comes from. A leaf field’s type is declared on its source (a Column’s ty, an Aggregate’s value_type) so the document shape is known without a database.

Fields

field: FieldName

options: BTreeMap<String, GenericValue>

Extra OpenSearch mapping properties merged beside the derived type (e.g. analyzer, scaling_factor). Empty for most fields.

emit: bool

Whether the field reaches the emitted document. false makes it input-only: fetched so a Script can read it, then stripped, and left out of the mapping.

source: FieldSource

Implementations

impl Field

pub fn children(&self) -> &[Field]

The fields nested directly under this one: a Group’s members or a Join’s projection. Columns, aggregates, constants, and scripts have none.

pub fn relation(&self) -> Option<&Relation>

pub fn column(&self) -> Option<&ColumnName>

The column this field reads, if it is a plain column field.

Trait Implementations

impl Clone for Field

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 Field

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Field

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Hash for Field

Hashes emit only when it is off, so a schema with no input-only field keeps the content hash it had before emit existed.

fn hash<H: Hasher>(&self, state: &mut H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Serialize for Field

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

where __S: Serializer,

Serialize this value into the given Serde serializer.