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Functions
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use bonsaidb::core::{
document::{CollectionDocument, Emit},
schema::{
view::CollectionViewSchema, Collection, ReduceResult, View, ViewMapResult, ViewMappedValue,
},
};
use serde::{Deserialize, Serialize};
#[derive(Debug, Serialize, Deserialize, Collection)]
#[collection(name = "shapes", views = [ShapesByNumberOfSides])]
pub struct Shape {
pub sides: u32,
}
impl Shape {
pub fn new(sides: u32) -> Self {
Self { sides }
#[derive(Debug, Clone, View)]
#[view(collection = Shape, key = u32, value = usize, name = "by-number-of-sides")]
pub struct ShapesByNumberOfSides;
impl CollectionViewSchema for ShapesByNumberOfSides {
type View = Self;
fn map(
&self,
document: CollectionDocument<<Self::View as View>::Collection>,
) -> ViewMapResult<Self::View> {
document
.header
.emit_key_and_value(document.contents.sides, 1)
fn reduce(
mappings: &[ViewMappedValue<Self::View>],
_rereduce: bool,
) -> ReduceResult<Self::View> {
Ok(mappings.iter().map(|m| m.value).sum())