Struct ServerFetchPolicy 

pub struct ServerFetchPolicy {
    pub dedupe_key: Option<Arc<dyn Fn(&PageRequest) -> String + Send + Sync>>,
}

Policy for server-driven DataTableSource::Server fetches.

Stale-response suppression

By default, every sort/filter/quick-search/offset/page-size change starts a new fetch generation. When a slower response from an older generation completes, it is dropped so rows and totals cannot be overwritten by stale data. This uses a generation counter inside the table — user fetchers (typically Leptos server functions) do not need to support HTTP abort or cancellation tokens.

Dedupe

When Self::dedupe_key is set, consecutive fetches whose keys match the previous request are skipped. The dedupe cache is cleared when filter or quick-search changes.

server_total invalidation

• Filter or quick-search change clears server_total so the footer shows an estimated range until the next page-0 response supplies Page::total_count.
• Page > 0 responses often omit total_count; the table retains the last known total until filter/search clears it or offset 0 returns a fresh count.
• Sort and page-size changes reset offset but do not clear the total.

Server + advanced features

Server-fetched pages are rendered as returned by the fetcher. Tree, row grouping, pivot, and aggregation run in the client run_processed_pipeline for client sources only — enable those features only when the server implements the corresponding semantics.

Deferred

Response caching (ServerFetchPolicy::Cache(ttl)) is deferred per design §11.2.

Fields

dedupe_key: Option<Arc<dyn Fn(&PageRequest) -> String + Send + Sync>>

When set, skip a fetch when this key equals the previous request’s key.

Implementations

impl ServerFetchPolicy

pub fn new() -> Self

Default policy: always invalidate stale in-flight responses; no dedupe.

Trait Implementations

impl Clone for ServerFetchPolicy

fn clone(&self) -> ServerFetchPolicy

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Default for ServerFetchPolicy

fn default() -> ServerFetchPolicy

Returns the “default value” for a type.