diff --git a/src/models/computed_permission.rs b/src/models/computed_permission.rs
index f3199f2..429eb63 100644
--- a/src/models/computed_permission.rs
+++ b/src/models/computed_permission.rs
@@ -48,9 +48,6 @@ pub struct Model {
         on_delete = "Cascade"
     )]
     pub user: HasOne<super::user::Entity>,
-
-    #[sea_orm(has_many)]
-    pub computed_permissions: HasMany<super::computed_permission::Entity>,
 }
 
 #[async_trait]
diff --git a/src/repositories/computed_permission.rs b/src/repositories/computed_permission.rs
index dea7d1f..bca99a3 100644
--- a/src/repositories/computed_permission.rs
+++ b/src/repositories/computed_permission.rs
@@ -13,6 +13,7 @@ use std::sync::{Arc, OnceLock};
 use uuid::Uuid;
 
 use crate::models::computed_permission::PermissionScopeType;
+use crate::repositories::types::PermissionResource;
 use crate::utils::ScopedLockManager;
 
 // Instance globale du manager de verrous scopés par Server ID
@@ -35,6 +36,19 @@ impl ComputedPermissionRepository {
             .await?)
     }
 
+    pub async fn get_for_resource(
+        &self,
+        user_id: Uuid,
+        resource: PermissionResource,
+    ) -> AnyResult<Option<computed_permission::Model>> {
+        Ok(computed_permission::Entity::find()
+            .filter(computed_permission::Column::UserId.eq(user_id))
+            .filter(computed_permission::Column::ScopeType.eq(resource.scope_type()))
+            .filter(computed_permission::Column::ResourceId.eq(resource.resource_id()))
+            .one(&self.context.db)
+            .await?)
+    }
+
     /// Vérifie si l'utilisateur possède au moins une entrée de permission sur une ressource.
     pub async fn had_perm_on(&self, user_id: Uuid, resource_id: Uuid) -> AnyResult<bool> {
         Ok(computed_permission::Entity::find()
diff --git a/src/repositories/server_tree.rs b/src/repositories/server_tree.rs
index df24052..3e5ae9d 100644
--- a/src/repositories/server_tree.rs
+++ b/src/repositories/server_tree.rs
@@ -67,11 +67,14 @@ impl ServerTreeRepository {
         server_id: Uuid,
         user_id: Uuid,
     ) -> AnyResult<Vec<(channel::Model, Option<computed_permission::Model>)>> {
+        // Construction dynamique de la relation personnalisée (channel.id = computed_permission.resource_id)
+        let channel_to_permission = channel::Entity::belongs_to(computed_permission::Entity)
+            .from(channel::Column::Id)
+            .to(computed_permission::Column::ResourceId)
+            .into();
+
         let rows = channel::Entity::find()
-            .join(
-                JoinType::InnerJoin,
-                channel::Relation::ComputedPermission.def(),
-            )
+            .join(JoinType::InnerJoin, channel_to_permission)
             .filter(channel::Column::ServerId.eq(server_id))
             .filter(computed_permission::Column::UserId.eq(user_id))
             .filter(computed_permission::Column::ServerId.eq(server_id))
diff --git a/src/repositories/types.rs b/src/repositories/types.rs
index a7019bd..582afec 100644
--- a/src/repositories/types.rs
+++ b/src/repositories/types.rs
@@ -1,4 +1,5 @@
-use crate::models::{category, channel};
+use crate::models::{category, channel, computed_permission};
+use uuid::Uuid;
 
 pub enum ServerExplorerItem {
     Category(category::Model, Vec<channel::Model>),
@@ -32,3 +33,26 @@ pub struct ChannelFilter {
 pub struct UserFilter {
     pub server_id: Option<uuid::Uuid>,
 }
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub enum PermissionResource {
+    Server(Uuid),
+    Category(Uuid),
+    Channel(Uuid),
+}
+
+impl PermissionResource {
+    pub fn scope_type(self) -> computed_permission::PermissionScopeType {
+        match self {
+            Self::Server(_) => computed_permission::PermissionScopeType::Server,
+            Self::Category(_) => computed_permission::PermissionScopeType::Category,
+            Self::Channel(_) => computed_permission::PermissionScopeType::Channel,
+        }
+    }
+
+    pub fn resource_id(self) -> Uuid {
+        match self {
+            Self::Server(id) | Self::Category(id) | Self::Channel(id) => id,
+        }
+    }
+}