send flash msg to /admin view

src/rest/admin/user.rs

@@ -2,19 +2,29 @@ use crate::model::user::{AdminUser, User};
 use rocket::{
     form::Form,
     get, post,
+    request::FlashMessage,
     response::{Flash, Redirect},
     routes, FromForm, Route, State,
 };
-use rocket_dyn_templates::{context, Template};
+use rocket_dyn_templates::{tera::Context, Template};
 use sqlx::SqlitePool;
 
 #[get("/user")]
-async fn index(db: &State<SqlitePool>, admin: AdminUser) -> Template {
+async fn index(
+    db: &State<SqlitePool>,
+    admin: AdminUser,
+    flash: Option<FlashMessage<'_>>,
+) -> Template {
     let users = User::all(db).await;
-    Template::render(
-        "admin/user/index",
-        context!(users, loggedin_user: admin.user),
-    )
+
+    let mut context = Context::new();
+    if let Some(msg) = flash {
+        context.insert("flash", &msg.into_inner());
+    }
+    context.insert("users", &users);
+    context.insert("loggedin_user", &admin.user);
+
+    Template::render("admin/user/index", context.into_json())
 }
 
 #[get("/user/<user>/reset-pw")]