Struct AggregateSpec 

pub struct AggregateSpec {
    pub group_by: Option<String>,
    pub reductions: Vec<(AggregateFn, String)>,
    pub group_limit: usize,
    pub label_field: Option<String>,
    pub label_relation: Option<(String, String)>,
}

What to group by and what to reduce — the parsed form of the query string.

Fields

group_by: Option<String>

Column whose distinct values become groups. None asks for one total.

reductions: Vec<(AggregateFn, String)>

(function, column) pairs, in the order the caller asked for them.

group_limit: usize

Most groups to return before reporting the answer as truncated.

label_field: Option<String>

Carry a label per group: the column on the group column’s RELATED table (resolved through the entity’s relation metadata) to show instead of a bare uuid key. None = keys stay as they are.

label_relation: Option<(String, String)>

The resolved relation behind the group column — (target table, the BASE table's FK column, snake), filled by the generic layer from the entity’s relations() metadata. Callers never set this.

Trait Implementations

impl Clone for AggregateSpec

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 AggregateSpec

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

Formats the value using the given formatter.

impl Default for AggregateSpec

fn default() -> Self

Returns the “default value” for a type.