wrap uuid so we can bridge diesel and rockets uuid types manually

Author: technetos

Cargo.toml

@@ -7,6 +7,9 @@ edition = "2018"
 [dependencies]
 diesel = { version = "1.3.2", features = ["postgres", "chrono", "uuid"] }
 postgres_resource_derive = { path = "./postgres_resource_derive" }
+uuid = { version = "0.7", features = ["serde", "v4"] }
+serde_derive = "1.0"
+serde = "1.0"
 
 [dev-dependencies]
 diesel_migrations = { version = "1.3.0", features = ["postgres"] }

src/lib.rs

@@ -1,7 +1,11 @@
+#![feature(custom_attribute)]
 pub use postgres_resource_derive::resource;
+pub mod uuid;
+
+#[macro_use]
+extern crate diesel;
 
 use diesel::{
-    self,
     expression::BoxableExpression,
     pg::{Pg, PgConnection},
     prelude::*,

src/uuid.rs

@@ -0,0 +1,35 @@
+use diesel::{
+    deserialize::{self, FromSql},
+    pg::Pg,
+    serialize::{self, IsNull, Output, ToSql},
+    sql_types::Uuid as UuidDiesel,
+    not_none,
+    expression::Expression,
+};
+use serde_derive::{Serialize, Deserialize};
+use std::io::Write;
+use uuid;
+
+#[derive(Clone, Debug, AsExpression, PartialEq, FromSqlRow, Serialize, Deserialize, Hash, Eq)]
+#[sql_type = "UuidDiesel"]
+pub struct Uuid(pub uuid::Uuid);
+
+impl ToSql<UuidDiesel, Pg> for Uuid {
+    fn to_sql<W: Write>(&self, out: &mut Output<W, Pg>) -> serialize::Result {
+        out.write_all(self.0.as_bytes())?;
+        Ok(IsNull::No)
+    }
+}
+
+impl FromSql<UuidDiesel, Pg> for Uuid {
+    fn from_sql(bytes: Option<&[u8]>) -> deserialize::Result<Self> {
+        let bytes = not_none!(bytes);
+        Ok(Uuid(uuid::Uuid::from_slice(bytes)?))
+    }
+}
+
+impl From<uuid::Uuid> for Uuid {
+    fn from(uuid: uuid::Uuid) -> Self {
+        Uuid(uuid)
+    }
+}