drive/query/
ordering.rs

1//! Query Ordering
2//!
3
4use dpp::platform_value::Value;
5use grovedb::Error;
6
7/// Order clause struct
8#[derive(Clone, Debug, PartialEq, Eq)]
9#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
10pub struct OrderClause {
11    /// Field
12    pub field: String,
13    /// Ascending bool
14    pub ascending: bool,
15}
16
17impl OrderClause {
18    /// Converts clause components to an `OrderClause`.
19    pub fn from_components(clause_components: &[Value]) -> Result<Self, Error> {
20        if clause_components.len() != 2 {
21            return Err(Error::InvalidQuery(
22                "order clause should have exactly 2 components",
23            ));
24        }
25
26        let field_value = clause_components
27            .first()
28            .expect("check above enforces it exists");
29        let field_ref = field_value.as_text().ok_or(Error::InvalidQuery(
30            "first field of where component should be a string",
31        ))?;
32        let field = String::from(field_ref);
33
34        let asc_string_value = clause_components.get(1).unwrap();
35        let asc_string = match asc_string_value {
36            Value::Text(asc_string) => Some(asc_string.as_str()),
37            _ => None,
38        }
39        .ok_or(Error::InvalidQuery(
40            "orderBy right component must be a string",
41        ))?;
42        let ascending = match asc_string {
43            "asc" => true,
44            "desc" => false,
45            _ => {
46                return Err(Error::InvalidQuery(
47                    "orderBy right component must be either a asc or desc string",
48                ));
49            }
50        };
51
52        Ok(OrderClause { field, ascending })
53    }
54}
55
56impl From<OrderClause> for Value {
57    fn from(order: OrderClause) -> Self {
58        let direction = match order.ascending {
59            true => "asc",
60            false => "desc",
61        };
62
63        Self::Array(vec![order.field.into(), direction.into()])
64    }
65}
drive/query/ordering.rs

drive/query/
ordering.rs
