Add basic geojson serialization capabilities

Cargo.lock

@@ -847,6 +847,7 @@ checksum = "d69a45c13765c7c6dce8e0fc3d976e669d4de545529c769f44e55b59a4d76c69"
 dependencies = [
  "byteorder",
  "diesel",
+ "serde",
 ]
 
 [[package]]
@@ -1039,6 +1040,8 @@ dependencies = [
  "dotenvy",
  "http",
  "postgis_diesel",
+ "serde",
+ "serde_json",
  "tokio",
 ]
 

Cargo.toml

@@ -16,5 +16,7 @@ diesel = { version = "2.1.6", features = ["postgres"] }
 diesel-derive-enum = { version = "2.1.0", features = ["postgres"] }
 dotenvy = "0.15.7"
 http = "1.1.0"
-postgis_diesel =  "2.3.1"
+postgis_diesel = { version = "2.3.1", features = ["serde_geojson"] }
+serde = { version = "1.0.202", features = ["derive"] }
+serde_json = "1.0.117"
 tokio = {version = "1.37.0", features = ["full"]}

src/models.rs

@@ -1,15 +1,16 @@
 use crate::schema::{nodes, restaurants};
 use diesel::prelude::*;
 use postgis_diesel::types::Point;
+use serde::{Deserialize, Serialize};
 
-#[derive(diesel_derive_enum::DbEnum, Debug)]
+#[derive(diesel_derive_enum::DbEnum, Debug, Serialize, Deserialize)]
 #[ExistingTypePath = "crate::schema::sql_types::NodeType"]
 pub enum NodeType {
     Marker,
     Restaurant,
 }
 
-#[derive(Insertable)]
+#[derive(Insertable, Serialize, Deserialize)]
 #[diesel(table_name = nodes)]
 pub struct NewNode<'a> {
     pub name: &'a str,
@@ -17,7 +18,7 @@ pub struct NewNode<'a> {
     pub coordinates: Point,
 }
 
-#[derive(Debug, Queryable, AsChangeset)]
+#[derive(Debug, Queryable, AsChangeset, Deserialize)]
 pub struct Node {
     pub id: i32,
     pub name: String,
@@ -25,7 +26,7 @@ pub struct Node {
     pub coordinates: Point,
 }
 
-#[derive(Insertable)]
+#[derive(Insertable, Deserialize)]
 #[diesel(table_name = restaurants)]
 pub struct NewRestaurant<'a> {
     pub node_id: i32,
@@ -33,7 +34,7 @@ pub struct NewRestaurant<'a> {
     pub price: i16,
 }
 
-#[derive(Debug, Queryable, AsChangeset)]
+#[derive(Debug, Queryable, AsChangeset, Deserialize)]
 pub struct Restaurant {
     pub id: i32,
     pub node_id: i32,