implement access rights for view models

actix_admin_macros/src/lib.rs

@@ -22,31 +22,11 @@ pub fn derive_actix_admin_select_list(input: proc_macro::TokenStream) -> proc_ma
     get_select_list(input)
 }
 
-#[proc_macro_derive(DeriveActixAdminModel, attributes(actix_admin))]
+#[proc_macro_derive(DeriveActixAdmin, attributes(actix_admin))]
-pub fn derive_crud_fns(input: proc_macro::TokenStream) -> proc_macro::TokenStream {
+pub fn derive_actix_admin(_input: proc_macro::TokenStream) -> proc_macro::TokenStream {
-    let fields = get_fields_for_tokenstream(input);
-
-    let field_names = get_actix_admin_fields(&fields);
-    let field_html_input_type = get_actix_admin_fields_html_input(&fields);
-    let field_select_list = get_actix_admin_fields_select_list(&fields);
-    let is_option_list = get_actix_admin_fields_is_option_list(&fields);
-    let name_primary_field_str = get_primary_key_field_name(&fields);
-    let fields_for_create_model = get_fields_for_create_model(&fields);
-    let fields_for_edit_model = get_fields_for_edit_model(&fields);
-    let fields_for_from_model = get_fields_for_from_model(&fields);
-    let field_for_primary_key = get_field_for_primary_key(&fields);
-    let fields_for_validate_model = get_fields_for_validate_model(&fields);
-    let fields_searchable = get_actix_admin_fields_searchable(&fields);
-    let has_searchable_fields = fields_searchable.len() > 0;
-    let fields_type_path = get_actix_admin_fields_type_path_string(&fields);
-
-    let select_lists = get_select_lists(&fields);
-
     let expanded = quote! {
         use std::convert::From;
-        use std::iter::zip;
         use async_trait::async_trait;
-        use actix_web::{web, HttpResponse, HttpRequest, Error};
         use actix_admin::prelude::*;
         use sea_orm::ActiveValue::Set;
         use sea_orm::{ConnectOptions, DatabaseConnection};
@@ -54,8 +34,35 @@ pub fn derive_crud_fns(input: proc_macro::TokenStream) -> proc_macro::TokenStrea
         use std::collections::HashMap;
         use sea_orm::EntityTrait;
         use itertools::izip;
-        use quote::quote;
+        use actix_session::{Session};
+    };
+    proc_macro::TokenStream::from(expanded)
+}
 
+#[proc_macro_derive(DeriveActixAdminViewModelAccess, attributes(actix_admin))]
+pub fn derive_actix_admin_view_model_access(_input: proc_macro::TokenStream) -> proc_macro::TokenStream {
+    let expanded = quote! {
+        impl ActixAdminViewModelAccessTrait for Entity {
+            fn user_can_access(session: &Session) -> bool {
+                true
+            }
+        }
+    };
+    proc_macro::TokenStream::from(expanded)
+}
+
+#[proc_macro_derive(DeriveActixAdminViewModel, attributes(actix_admin))]
+pub fn derive_actix_admin_view_model(input: proc_macro::TokenStream) -> proc_macro::TokenStream {
+    let fields = get_fields_for_tokenstream(input);
+
+    let name_primary_field_str = get_primary_key_field_name(&fields);
+    let fields_for_edit_model = get_fields_for_edit_model(&fields);
+    let fields_searchable = get_actix_admin_fields_searchable(&fields);
+    let has_searchable_fields = fields_searchable.len() > 0;
+
+    let select_lists = get_select_lists(&fields);
+
+    let expanded = quote! {
         impl From<Entity> for ActixAdminViewModel {
             fn from(entity: Entity) -> Self {
                 ActixAdminViewModel {
@@ -67,29 +74,6 @@ pub fn derive_crud_fns(input: proc_macro::TokenStream) -> proc_macro::TokenStrea
             }
         }
 
-        impl From<Model> for ActixAdminModel {
-            fn from(model: Model) -> Self {
-                ActixAdminModel {
-                    #field_for_primary_key,
-                    values: hashmap![
-                        #(#fields_for_from_model),*
-                    ],
-                    errors: HashMap::new()
-                }
-            }
-        }
-
-        impl From<ActixAdminModel> for ActiveModel {
-            fn from(model: ActixAdminModel) -> Self {
-                ActiveModel
-                {
-                    #(#fields_for_create_model),*
-                    ,
-                    ..Default::default()
-                }
-            }
-        }
-
         #[async_trait(?Send)]
         impl ActixAdminViewModelTrait for Entity {
             async fn list(db: &DatabaseConnection, page: usize, entities_per_page: usize, search: &String) -> (usize, Vec<ActixAdminModel>) {
@@ -151,6 +135,49 @@ pub fn derive_crud_fns(input: proc_macro::TokenStream) -> proc_macro::TokenStrea
                 Entity.table_name().to_string()
             }
         }
+    };
+
+    proc_macro::TokenStream::from(expanded)
+}
+
+#[proc_macro_derive(DeriveActixAdminModel, attributes(actix_admin))]
+pub fn derive_actix_admin_model(input: proc_macro::TokenStream) -> proc_macro::TokenStream {
+    let fields = get_fields_for_tokenstream(input);
+
+    let field_names = get_actix_admin_fields(&fields);
+    let field_html_input_type = get_actix_admin_fields_html_input(&fields);
+    let field_select_list = get_actix_admin_fields_select_list(&fields);
+    let is_option_list = get_actix_admin_fields_is_option_list(&fields);
+    let fields_for_create_model = get_fields_for_create_model(&fields);
+    let fields_for_from_model = get_fields_for_from_model(&fields);
+    let field_for_primary_key = get_field_for_primary_key(&fields);
+    let fields_for_validate_model = get_fields_for_validate_model(&fields);
+    let fields_searchable = get_actix_admin_fields_searchable(&fields);
+    let fields_type_path = get_actix_admin_fields_type_path_string(&fields);
+
+    let expanded = quote! {
+        impl From<Model> for ActixAdminModel {
+            fn from(model: Model) -> Self {
+                ActixAdminModel {
+                    #field_for_primary_key,
+                    values: hashmap![
+                        #(#fields_for_from_model),*
+                    ],
+                    errors: HashMap::new()
+                }
+            }
+        }
+
+        impl From<ActixAdminModel> for ActiveModel {
+            fn from(model: ActixAdminModel) -> Self {
+                ActiveModel
+                {
+                    #(#fields_for_create_model),*
+                    ,
+                    ..Default::default()
+                }
+            }
+        }
 
         #[async_trait]
         impl ActixAdminModelTrait for Entity {

src/builder.rs

@@ -12,7 +12,7 @@ pub struct ActixAdminBuilder {
 
 pub trait ActixAdminBuilderTrait {
     fn new(configuration: ActixAdminConfiguration) -> Self;
-    fn add_entity<T: ActixAdminAppDataTrait + 'static, E: ActixAdminViewModelTrait + 'static>(
+    fn add_entity<T: ActixAdminAppDataTrait + 'static, E: ActixAdminViewModelTrait + ActixAdminViewModelAccessTrait + 'static>(
         &mut self,
         view_model: &ActixAdminViewModel,
     );
@@ -32,7 +32,7 @@ impl ActixAdminBuilderTrait for ActixAdminBuilder {
         }
     }
 
-    fn add_entity<T: ActixAdminAppDataTrait + 'static, E: ActixAdminViewModelTrait + 'static>(
+    fn add_entity<T: ActixAdminAppDataTrait + 'static, E: ActixAdminViewModelTrait + ActixAdminViewModelAccessTrait + 'static>(
         &mut self,
         view_model: &ActixAdminViewModel,
     ) {

src/lib.rs

@@ -13,8 +13,8 @@ pub mod builder;
 pub mod prelude {
     pub use crate::builder::{ ActixAdminBuilder, ActixAdminBuilderTrait};
     pub use crate::model::{ ActixAdminModel, ActixAdminModelTrait};
-    pub use crate::view_model::{ ActixAdminViewModel, ActixAdminViewModelTrait, ActixAdminViewModelField, ActixAdminViewModelFieldType };
+    pub use crate::view_model::{ ActixAdminViewModel, ActixAdminViewModelTrait, ActixAdminViewModelAccessTrait, ActixAdminViewModelField, ActixAdminViewModelFieldType };
-    pub use actix_admin_macros::{ DeriveActixAdminModel, DeriveActixAdminSelectList };
+    pub use actix_admin_macros::{ DeriveActixAdmin, DeriveActixAdminModel, DeriveActixAdminViewModel, DeriveActixAdminSelectList, DeriveActixAdminViewModelAccess };
     pub use crate::{ ActixAdminAppDataTrait, ActixAdmin, ActixAdminConfiguration };
     pub use crate::{ hashmap, ActixAdminSelectListTrait };
 }
@@ -93,17 +93,17 @@ pub trait ActixAdminSelectListTrait {
 }
 
 
-#[derive(Clone, Debug)]
+#[derive(Clone)]
 pub struct ActixAdminConfiguration {
     pub enable_auth: bool,
-    pub user_is_logged_in: Option<fn(Session) -> bool>,
+    pub user_is_logged_in: Option<for<'a> fn(&'a Session) -> bool>,
     pub login_link: String,
     pub logout_link: String
 }
 
-#[derive(Clone, Debug)]
+#[derive(Clone)]
 pub struct ActixAdmin {
     pub entity_names: Vec<String>,
     pub view_models: HashMap<String, ActixAdminViewModel>,
-    pub configuration: ActixAdminConfiguration,
+    pub configuration: ActixAdminConfiguration
 }

src/routes/create_or_edit_get.rs

@@ -4,10 +4,9 @@ use actix_session::{Session};
 use crate::prelude::*;
 
 use crate::TERA;
-use super::add_auth_context;
+use super::{ add_auth_context, user_can_access_page, render_unauthorized};
 
-
+pub async fn create_get<T: ActixAdminAppDataTrait, E: ActixAdminViewModelTrait + ActixAdminViewModelAccessTrait>(
-pub async fn create_get<T: ActixAdminAppDataTrait, E: ActixAdminViewModelTrait>(
     session: Session,
     _req: HttpRequest,
     data: web::Data<T>,
@@ -17,10 +16,10 @@ pub async fn create_get<T: ActixAdminAppDataTrait, E: ActixAdminViewModelTrait>(
     let db = &data.get_db();
     let model = ActixAdminModel::create_empty();
     
-    create_or_edit_get::<T, E>(session, &data, db, model).await
+    create_or_edit_get::<T, E>(&session, &data, db, model).await
 }
 
-pub async fn edit_get<T: ActixAdminAppDataTrait, E: ActixAdminViewModelTrait>(
+pub async fn edit_get<T: ActixAdminAppDataTrait, E: ActixAdminViewModelTrait + ActixAdminViewModelAccessTrait>(
     session: Session,
     _req: HttpRequest,
     data: web::Data<T>,
@@ -30,27 +29,27 @@ pub async fn edit_get<T: ActixAdminAppDataTrait, E: ActixAdminViewModelTrait>(
     let db = &data.get_db();
     let model = E::get_entity(db, id.into_inner()).await;
 
-    create_or_edit_get::<T, E>(session, &data, db, model).await
+    create_or_edit_get::<T, E>(&session, &data, db, model).await
 }
 
-async fn create_or_edit_get<T: ActixAdminAppDataTrait, E: ActixAdminViewModelTrait>(session: Session, data: &web::Data<T>, db: &sea_orm::DatabaseConnection, model: ActixAdminModel) -> Result<HttpResponse, Error>{
+async fn create_or_edit_get<T: ActixAdminAppDataTrait, E: ActixAdminViewModelTrait + ActixAdminViewModelAccessTrait>(session: &Session, data: &web::Data<T>, db: &sea_orm::DatabaseConnection, model: ActixAdminModel) -> Result<HttpResponse, Error>{
+    let actix_admin = &data.get_actix_admin();
+    let mut ctx = Context::new();
+    add_auth_context(&session, actix_admin, &mut ctx);
+    let entity_names = &actix_admin.entity_names;
+    ctx.insert("entity_names", entity_names);
     let entity_name = E::get_entity_name();
-    let entity_names = &data.get_actix_admin().entity_names;
 
-    let actix_admin = data.get_actix_admin();
+    if !user_can_access_page::<E>(&session, actix_admin) {
+        return render_unauthorized(&ctx);
+    }
 
     let view_model = actix_admin.view_models.get(&entity_name).unwrap();
-
-    let mut ctx = Context::new();
-    ctx.insert("entity_names", &entity_names);
     ctx.insert("view_model", &view_model);
     ctx.insert("select_lists", &E::get_select_lists(db).await);
     ctx.insert("list_link", &E::get_list_link(&entity_name));
     ctx.insert("model", &model);
-
+    
-    add_auth_context(session, actix_admin, &mut ctx);
-    // TODO: show 404 if user is not logged in but auth enabled
-
     let body = TERA
         .render("create_or_edit.html", &ctx)
         .map_err(|err| error::ErrorInternalServerError(err))?;

src/routes/create_or_edit_post.rs

@@ -1,50 +1,45 @@
 use actix_web::http::header;
-use actix_web::{web, error, Error, HttpRequest, HttpResponse};
+use actix_web::{web, error, Error, HttpResponse};
 use tera::{Context};
 use actix_session::{Session};
 use crate::TERA;
 use actix_multipart::Multipart;
-
+use super::{ user_can_access_page, render_unauthorized};
 use crate::prelude::*;
 
-pub async fn create_post<T: ActixAdminAppDataTrait, E: ActixAdminViewModelTrait>(
+pub async fn create_post<T: ActixAdminAppDataTrait, E: ActixAdminViewModelTrait + ActixAdminViewModelAccessTrait>(
     session: Session,
-    _req: HttpRequest,
     data: web::Data<T>,
     payload: Multipart,
 ) -> Result<HttpResponse, Error> {
-    let db = &data.get_db();
+    create_or_edit_post::<T, E>(&session, &data, payload, None).await
-    let mut model = ActixAdminModel::create_from_payload(payload).await.unwrap();
-    model = E::create_entity(db, model).await;
-
-    create_or_edit_post::<T, E>(session, &data, db, model).await
 }
 
-pub async fn edit_post<T: ActixAdminAppDataTrait, E: ActixAdminViewModelTrait>(
+pub async fn edit_post<T: ActixAdminAppDataTrait, E: ActixAdminViewModelTrait + ActixAdminViewModelAccessTrait>(
     session: Session,
-    _req: HttpRequest,
     data: web::Data<T>,
     payload: Multipart,
     id: web::Path<i32>
 ) -> Result<HttpResponse, Error> {
-    let db = &data.get_db();
+    create_or_edit_post::<T, E>(&session, &data, payload, Some(id.into_inner())).await
-    let mut model = ActixAdminModel::create_from_payload(payload).await.unwrap();
-    model = E::edit_entity(db, id.into_inner(), model).await;
-
-    create_or_edit_post::<T, E>(session, &data, db, model).await
 }
 
-async fn create_or_edit_post<T: ActixAdminAppDataTrait, E: ActixAdminViewModelTrait>(_session: Session, data: &web::Data<T>, db: &sea_orm::DatabaseConnection, model: ActixAdminModel) -> Result<HttpResponse, Error> {
+async fn create_or_edit_post<T: ActixAdminAppDataTrait, E: ActixAdminViewModelTrait + ActixAdminViewModelAccessTrait>(session: &Session, data: &web::Data<T>, payload: Multipart, id: Option<i32>) -> Result<HttpResponse, Error> {
-    let entity_name = E::get_entity_name();
-    let entity_names = &data.get_actix_admin().entity_names;
     let actix_admin = data.get_actix_admin();
+    if !user_can_access_page::<E>(&session, actix_admin) {
+        let mut ctx = Context::new();
+        ctx.insert("render_partial", &true);
+        return render_unauthorized(&ctx);
+    }
+    
+    let db = &data.get_db();
+    let entity_name = E::get_entity_name();
     let view_model = actix_admin.view_models.get(&entity_name).unwrap();
-
+    let model = ActixAdminModel::create_from_payload(payload).await.unwrap();
-    // TODO: verify is user is logged in and can delete entity
 
     if model.has_errors() {
         let mut ctx = Context::new();
-        ctx.insert("entity_names", &entity_names);
+        ctx.insert("entity_names", &actix_admin.entity_names);
         ctx.insert("view_model", &view_model);
         ctx.insert("select_lists", &E::get_select_lists(db).await);
         ctx.insert("list_link", &E::get_list_link(&entity_name));
@@ -56,6 +51,11 @@ async fn create_or_edit_post<T: ActixAdminAppDataTrait, E: ActixAdminViewModelTr
         Ok(HttpResponse::Ok().content_type("text/html").body(body))
     }
     else {
+        match id {
+            Some(id) => E::edit_entity(db, id, model).await,
+            None => E::create_entity(db, model).await
+        };
+
         Ok(HttpResponse::SeeOther()
             .append_header((
                 header::LOCATION,

src/routes/delete.rs

@@ -2,27 +2,43 @@ use actix_web::{web, Error, HttpRequest, HttpResponse};
 use actix_web::http::header;
 use actix_session::{Session};
 use crate::prelude::*;
+use tera::{Context};
+use super::{ user_can_access_page, render_unauthorized};
 
-pub async fn delete<T: ActixAdminAppDataTrait, E: ActixAdminViewModelTrait>(
+pub async fn delete<T: ActixAdminAppDataTrait, E: ActixAdminViewModelTrait + ActixAdminViewModelAccessTrait>(
+    session: Session,
     _req: HttpRequest,
     data: web::Data<T>,
     _text: String,
     id: web::Path<i32>
 ) -> Result<HttpResponse, Error> {
-    let db = &data.get_db();
+    let actix_admin = data.get_actix_admin();
+    if !user_can_access_page::<E>(&session, actix_admin) {
+        let mut ctx = Context::new();
+        ctx.insert("render_partial", &true);
+        return render_unauthorized(&ctx);
+    }
 
+    let db = &data.get_db();
     let _result = E::delete_entity(db, id.into_inner()).await;
 
     Ok(HttpResponse::Ok()
         .finish())
 }
 
-pub async fn delete_many<T: ActixAdminAppDataTrait, E: ActixAdminViewModelTrait>(
+pub async fn delete_many<T: ActixAdminAppDataTrait, E: ActixAdminViewModelTrait + ActixAdminViewModelAccessTrait>(
     session: Session,
     _req: HttpRequest,
     data: web::Data<T>,
     text: String,
 ) -> Result<HttpResponse, Error> {
+    let actix_admin = data.get_actix_admin();
+    if !user_can_access_page::<E>(&session, actix_admin) {
+        let mut ctx = Context::new();
+        ctx.insert("render_partial", &true);
+        return render_unauthorized(&ctx);
+    }
+    
     let db = &data.get_db();
     let entity_name = E::get_entity_name();
     let entity_ids: Vec<i32> = text
@@ -31,8 +47,6 @@ pub async fn delete_many<T: ActixAdminAppDataTrait, E: ActixAdminViewModelTrait>
         .map(|id_str| id_str.replace("ids=", "").parse::<i32>().unwrap()
     ).collect();
     
-    // TODO: verify is user is logged in and can delete entity
-
     // TODO: implement delete_many
     for id in entity_ids {
         let _result = E::delete_entity(db, id).await;

src/routes/helpers.rs

@@ -2,8 +2,11 @@ use actix_session::{Session};
 use tera::{Context};
 
 use crate::prelude::*;
+use crate::TERA;
+use actix_web::{error, Error, HttpResponse};
 
-pub fn add_auth_context(session: Session, actix_admin: &ActixAdmin, ctx: &mut Context) {
+
+pub fn add_auth_context(session: &Session, actix_admin: &ActixAdmin, ctx: &mut Context) {
     let enable_auth = &actix_admin.configuration.enable_auth;
     ctx.insert("enable_auth", &enable_auth);
     if *enable_auth {
@@ -12,4 +15,24 @@ pub fn add_auth_context(session: Session, actix_admin: &ActixAdmin, ctx: &mut Co
         ctx.insert("login_link", &actix_admin.configuration.login_link);
         ctx.insert("logout_link", &actix_admin.configuration.logout_link);
     }
+}
+
+pub fn user_can_access_page<E: ActixAdminViewModelAccessTrait>(session: &Session, actix_admin: &ActixAdmin) -> bool {
+    let auth_is_enabled = &actix_admin.configuration.enable_auth;
+    let user_is_logged_in = &actix_admin.configuration.user_is_logged_in;
+    let user_can_access_viewmodel = E::user_can_access(session);
+
+    match (auth_is_enabled, user_can_access_viewmodel, user_is_logged_in) {
+        (true, true, Some(auth_func)) => auth_func(session),
+        (true, false, _) => false,
+        (true, _, None) => false,
+        (false, _, _) => true
+    }
+}
+
+pub fn render_unauthorized(ctx: &Context) -> Result<HttpResponse, Error> {
+    let body = TERA
+            .render("unauthorized.html", &ctx)
+            .map_err(|err| error::ErrorInternalServerError(err))?;
+    Ok(HttpResponse::Unauthorized().content_type("text/html").body(body))
 }

src/routes/index.rs

@@ -6,17 +6,15 @@ use crate::prelude::*;
 
 use crate::TERA;
 
-use super::add_auth_context;
+use super::{ add_auth_context };
 
 pub async fn index<T: ActixAdminAppDataTrait>(session: Session, data: web::Data<T>) -> Result<HttpResponse, Error> {
-    let entity_names = &data.get_actix_admin().entity_names;
     let actix_admin = data.get_actix_admin();
 
     let mut ctx = Context::new();
-    ctx.insert("entity_names", &entity_names);
+    ctx.insert("entity_names", &actix_admin.entity_names);
 
-    add_auth_context(session, actix_admin, &mut ctx);
+    add_auth_context(&session, actix_admin, &mut ctx);
-    // TODO: show 404 if user is not logged in but auth enabled
 
     let body = TERA
         .render("index.html", &ctx)

src/routes/list.rs

@@ -9,7 +9,7 @@ use crate::ActixAdminViewModel;
 use crate::ActixAdminModel;
 use crate::TERA;
 use actix_session::{Session};
-use super::add_auth_context;
+use super::{ add_auth_context, user_can_access_page, render_unauthorized};
 
 const DEFAULT_ENTITIES_PER_PAGE: usize = 10;
 
@@ -21,15 +21,23 @@ pub struct Params {
     search: Option<String>
 }
 
-pub async fn list<T: ActixAdminAppDataTrait, E: ActixAdminViewModelTrait>(
+pub async fn list<T: ActixAdminAppDataTrait, E: ActixAdminViewModelTrait + ActixAdminViewModelAccessTrait>(
     session: Session,
     req: HttpRequest,
     data: web::Data<T>,
 ) -> Result<HttpResponse, Error> {
-    let entity_name = E::get_entity_name();
     let actix_admin = data.get_actix_admin();
+    let mut ctx = Context::new();
+    add_auth_context(&session, actix_admin, &mut ctx);
+
+    ctx.insert("entity_names", &actix_admin.entity_names);
+
+    if !user_can_access_page::<E>(&session, actix_admin) {
+        return render_unauthorized(&ctx);
+    }
+
+    let entity_name = E::get_entity_name();
     let view_model: &ActixAdminViewModel = actix_admin.view_models.get(&entity_name).unwrap();
-    let entity_names = &data.get_actix_admin().entity_names;
 
     let params = web::Query::<Params>::from_query(req.query_string()).unwrap();
 
@@ -45,8 +53,6 @@ pub async fn list<T: ActixAdminAppDataTrait, E: ActixAdminViewModelTrait>(
     let entities = result.1;
     let num_pages = result.0;
 
-    let mut ctx = Context::new();
-    ctx.insert("entity_names", &entity_names);
     ctx.insert("entity_name", &entity_name);
     ctx.insert("entities", &entities);
     ctx.insert("page", &page);
@@ -56,8 +62,6 @@ pub async fn list<T: ActixAdminAppDataTrait, E: ActixAdminViewModelTrait>(
     ctx.insert("num_pages", &num_pages);
     ctx.insert("view_model", &view_model);
     ctx.insert("search", &search);
-    // TODO: show 404 if user is not logged in but auth enabled
-    add_auth_context(session, actix_admin, &mut ctx);
 
     let body = TERA
         .render("list.html", &ctx)

src/routes/mod.rs

@@ -14,4 +14,4 @@ mod delete;
 pub use delete::{ delete, delete_many };
 
 mod helpers;
-pub use helpers::{ add_auth_context };
+pub use helpers::{ add_auth_context, user_can_access_page, render_unauthorized };

src/view_model.rs

@@ -3,6 +3,7 @@ use sea_orm::DatabaseConnection;
 use serde::{Serialize, Deserialize};
 use std::collections::HashMap;
 use crate::ActixAdminModel;
+use actix_session::{Session};
 
 #[async_trait(?Send)]
 pub trait ActixAdminViewModelTrait {
@@ -27,6 +28,10 @@ pub trait ActixAdminViewModelTrait {
     }
 }
 
+pub trait ActixAdminViewModelAccessTrait {
+    fn user_can_access(session: &Session) -> bool;
+}
+
 #[derive(Clone, Debug, Serialize)]
 pub struct ActixAdminViewModel {
     pub entity_name: String,

templates/unauthorized.html

@@ -0,0 +1,5 @@
+{% extends "base.html" %}
+
+{% block content %}
+Unauthorized
+{% endblock content %}