Update examples

examples/custom_types.rs

@@ -0,0 +1,75 @@
+use skytable::{
+    query,
+    query::SQParam,
+    response::{FromResponse, Response},
+    ClientResult, Config,
+};
+
+#[derive(Debug, PartialEq, Clone)]
+struct User {
+    username: String,
+    password: String,
+    followers: u64,
+    email: Option<String>,
+}
+
+impl User {
+    fn new(username: String, password: String, followers: u64, email: Option<String>) -> Self {
+        Self {
+            username,
+            password,
+            followers,
+            email,
+        }
+    }
+}
+
+impl SQParam for User {
+    fn append_param(&self, q: &mut Vec<u8>) -> usize {
+        self.username.append_param(q)
+            + self.password.append_param(q)
+            + self.followers.append_param(q)
+            + self.email.append_param(q)
+    }
+}
+
+impl FromResponse for User {
+    fn from_response(resp: Response) -> ClientResult<Self> {
+        let (username, password, followers, email) = FromResponse::from_response(resp)?;
+        Ok(Self::new(username, password, followers, email))
+    }
+}
+
+fn main() {
+    let mut db = Config::new_default("username", "password")
+        .connect()
+        .unwrap();
+
+    // set up schema
+    // create space
+    db.query_parse::<()>(&query!("create space myspace"))
+        .unwrap();
+    // create model
+    db.query_parse::<()>(&query!(
+        "create model myspace.mymodel(username: string, password: string, followers: uint64, null email: string"
+    ))
+    .unwrap();
+
+    // insert data
+    let our_user = User::new("myuser".into(), "pass123".into(), 0, None);
+    db.query_parse::<()>(&query!(
+        "insert into myspace.mymodel(?, ?, ?, ?)",
+        our_user.clone()
+    ))
+    .unwrap();
+
+    // select data
+    let ret_user: User = db
+        .query_parse(&query!(
+            "select * from myspace.mymodel WHERE username = ?",
+            &our_user.username
+        ))
+        .unwrap();
+
+    assert_eq!(our_user, ret_user);
+}