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28 lines
864 B
Rust
28 lines
864 B
Rust
use crate::database::query::{Field, ValueField};
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/// A aggregation field.
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/// Contains the `Field` to aggregate by, the `Value` used for aggregation
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/// As well as the index in the stack of Segmentations that this relates to.
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pub struct Aggregation {
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pub(in super::super) value: Option<ValueField>,
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pub(in super::super) field: Field,
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pub(in super::super) index: usize,
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}
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impl Aggregation {
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/// Return the value in this aggregation as a string
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pub fn value(&self) -> Option<String> {
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self.value.as_ref().map(|e| e.value().to_string())
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}
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/// The name of the field as a `String`
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pub fn name(&self) -> &str {
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self.field.name()
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}
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/// The indes of the field within the given fields
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pub fn index(&self, in_fields: &[Field]) -> Option<usize> {
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in_fields.iter().position(|p| p == &self.field)
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}
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}
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