Struct Record 

pub struct Record {
    pub id: u64,
    pub key: String,
    pub fields: AHashMap<String, FieldValue>,
    pub source: Option<String>,
}

A single data record with a unique ID and a map of field values.

id is an internal u64 used for fast indexing and joins. treat it as opaque. key is the user-visible natural key: the value of whichever column was nominated as the identity column when loading the dataset (e.g. BSN, UUID, or primary-key value). The .zes output references records by (source, key), not by id.

Construction

• Record::from_key. preferred when loading real data via a zer_adapters::DatasetConfig. Derives id from hash(source:key).
• Record::new. for synthetic/test records; sets key = id.to_string().

Fields

id: u64

key: String

fields: AHashMap<String, FieldValue>

source: Option<String>

Implementations

impl Record

pub fn new(id: u64) -> Record

Create a record with an explicit numeric ID.

key is set to id.to_string(). Use this only for synthetic or test records. For real data use Record::from_key so that the natural key is preserved in the .zes output.

pub fn from_key(source: impl Into<String>, key: impl Into<String>) -> Record

Create a record whose identity comes from a natural key column.

id is derived deterministically via FNV-1a(source:key) so that the same (source, key) pair always produces the same internal ID. The source label is stored on the record, so calling Record::with_source afterwards is not required (but is a no-op).

pub fn with_source(self, source: impl Into<String>) -> Record

pub fn insert( self, name: impl Into<String>, value: impl Into<FieldValue>, ) -> Record

pub fn get(&self, name: &str) -> Option<&FieldValue>

pub fn text(&self, name: &str) -> Option<&str>

pub fn field_as_str(&self, name: &str) -> Option<Cow<'_, str>>

Returns the field value as a string, coercing non-text scalars to their string representation.

pub fn field_as<T>(&self, name: &str) -> Option<T>

where T: FromFieldValue,

Extract a typed value from a named field using the FromFieldValue trait.

use zer_core::record::{Record, FieldValue};
let r = Record::new(1).insert("lat", 52.37f64);
let lat: Option<f64> = r.field_as::<f64>("lat");
assert_eq!(lat, Some(52.37f64));

Trait Implementations

impl Clone for Record

fn clone(&self) -> Record

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Record

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Record

fn deserialize<__D>( __deserializer: __D, ) -> Result<Record, <__D as Deserializer<'de>>::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl IntoRecord for Record

fn into_record(self, _id: u64) -> Record

impl Serialize for Record

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

where __S: Serializer,

Serialize this value into the given Serde serializer.