Struct Metadata 

pub struct Metadata {
    pub fields: HashMap<String, MetadataValue>,
    pub created_at: u64,
    pub updated_at: u64,
}

Metadata record for a vector

Fields

fields: HashMap<String, MetadataValue>

Key-value pairs

created_at: u64

Creation timestamp

updated_at: u64

Last updated timestamp

Implementations

impl Metadata

pub fn new() -> Self

Create new metadata with current timestamp

pub fn set(&mut self, key: impl Into<String>, value: MetadataValue) -> &mut Self

Set a field value

pub fn get(&self, key: &str) -> Option<&MetadataValue>

Get a field value

pub fn has(&self, key: &str) -> bool

Check if a field exists

pub fn remove(&mut self, key: &str) -> Option<MetadataValue>

Remove a field

pub fn with_string( self, key: impl Into<String>, value: impl Into<String>, ) -> Self

Builder method for string field

pub fn with_integer(self, key: impl Into<String>, value: i64) -> Self

Builder method for integer field

pub fn with_timestamp(self, key: impl Into<String>, value: u64) -> Self

Builder method for timestamp field

pub fn with_boolean(self, key: impl Into<String>, value: bool) -> Self

Builder method for boolean field

Trait Implementations

impl Clone for Metadata

fn clone(&self) -> Metadata

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Metadata

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

Formats the value using the given formatter.

impl Default for Metadata

fn default() -> Metadata

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for Metadata

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for Metadata

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

where __S: Serializer,

Serialize this value into the given Serde serializer.