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use edgedb_protocol::{model::Uuid, value::Value};
use itertools::Itertools;
use crate::{prim::EdgedbPrim, value::EdgedbValue, EdgedbObject};
/// Basically a `Uuid` and an `Option<T>`. Use this instead of adding `id: Uuid` field to your structs.
#[derive(Debug, PartialEq, Eq)]
pub struct Ref<T: EdgedbObject> {
pub id: Uuid,
pub known_value: Option<T>,
}
impl<T: EdgedbObject> EdgedbValue for Ref<T> {
type NativeArgType = Value;
fn from_edgedb_value(value: edgedb_protocol::value::Value) -> anyhow::Result<Self> {
match value {
edgedb_protocol::value::Value::Object { shape, mut fields } => {
let uuid_i = shape
.elements
.iter()
.find_position(|e| e.name == "id")
.map(|(i, _)| i);
let id = uuid_i.and_then(|i| fields[i].take());
let id = Uuid::from_edgedb_val(id.ok_or_else(|| anyhow::anyhow!("Expected an object with an 'id' field when deserializing a Ref, got something else"))?)?;
if shape.elements.len() == 1 {
return Ok(Self {
id,
known_value: None,
});
}
// if shape.elements.len() == 2 {
// let known_value_i = shape
// .elements
// .iter()
// .find_position(|e: &&edgedb_protocol::codec::ShapeElement| {
// e.name == "_known_value"
// })
// .map(|(i, _)| i);
// if let Some(known_value_i) = known_value_i {
// let known_value = fields[known_value_i].take();
// let known_value = known_value
// .map(EdgedbValue::from_edgedb_value)
// .transpose()?;
// return Ok(Self { id, known_value });
// }
// }
let known_value = Some(T::from_edgedb_object(shape, fields)?);
Ok(Self { id, known_value })
}
edgedb_protocol::value::Value::Uuid(_) => {
anyhow::bail!("Expected an object when deserializing a Ref, got uuid (do we want to handle this?)")
}
edgedb_protocol::value::Value::SparseObject(_) => {
anyhow::bail!("Expected an object when deserializing a Ref, got sparse object (?)")
}
_ => {
anyhow::bail!("Expected an object when deserializing a Ref, got something else")
}
}
}
// fn to_edgedb_value(self) -> anyhow::Result<edgedb_protocol::value::Value> {
// todo!()
// }
}
#[cfg(test)]
mod test {
use crate::{value::EdgedbSetValue, EdgedbObject};
#[derive(Debug, PartialEq)]
struct Inner {
req: String,
opt: Option<String>,
}
impl EdgedbObject for Inner {
fn from_edgedb_object(
shape: edgedb_protocol::codec::ObjectShape,
mut fields: Vec<Option<edgedb_protocol::value::Value>>,
) -> anyhow::Result<Self> {
let mut req = None;
let mut opt = None;
for (i, s) in shape.elements.iter().enumerate() {
match s.name.as_str() {
"req" => {
req = fields[i]
.take()
.map(EdgedbSetValue::from_edgedb_set_value)
.transpose()?;
}
"opt" => {
opt = fields[i]
.take()
.map(EdgedbSetValue::from_edgedb_set_value)
.transpose()?;
}
_ => {}
}
}
Ok(Self {
req: EdgedbSetValue::interpret_possibly_missing_required_value(req)?,
opt: EdgedbSetValue::interpret_possibly_missing_required_value(opt)?,
})
}
// fn to_edgedb_object(
// &self,
// ) -> anyhow::Result<(
// edgedb_protocol::codec::ObjectShape,
// Vec<Option<edgedb_protocol::value::Value>>,
// )> {
// todo!()
// }
}
#[tokio::test]
async fn some_queries() -> anyhow::Result<()> {
let _conn = edgedb_tokio::create_client().await?;
// dbg!(query::<Vec<Ref<Inner>>>(&conn, "select Inner;").await?);
// dbg!(query::<Vec<Ref<Inner>>>(&conn, "select Inner {id, opt, req};").await?);
Ok(())
}
}