diff --git a/entity/src/candidate.rs b/entity/src/candidate.rs
index 4861e7c..fe2f725 100644
--- a/entity/src/candidate.rs
+++ b/entity/src/candidate.rs
@@ -28,10 +28,18 @@ pub struct Model {
 
 #[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]
 pub enum Relation {
+    #[sea_orm(has_one = "super::parent::Entity")]
+    Parent,
     #[sea_orm(has_many = "super::session::Entity")]
     Session,
 }
 
+impl Related<super::parent::Entity> for Entity {
+    fn to() -> RelationDef {
+        Relation::Parent.def()
+    }
+}
+
 impl Related<super::session::Entity> for Entity {
     fn to() -> RelationDef {
         Relation::Session.def()
diff --git a/entity/src/parent.rs b/entity/src/parent.rs
index 7e1b00c..4d107af 100644
--- a/entity/src/parent.rs
+++ b/entity/src/parent.rs
@@ -14,6 +14,19 @@ pub struct Model {
 }
 
 #[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]
-pub enum Relation {}
+pub enum Relation {
+    #[sea_orm(
+        belongs_to = "super::candidate::Entity",
+        from = "Column::Application",
+        to = "super::candidate::Column::Application"
+    )]
+    Candidate,
+}
+
+impl Related<super::candidate::Entity> for Entity {
+    fn to() -> RelationDef {
+        Relation::Candidate.def()
+    }
+}
 
 impl ActiveModelBehavior for ActiveModel {}
diff --git a/migration/src/lib.rs b/migration/src/lib.rs
index a8f21b1..d8329d8 100644
--- a/migration/src/lib.rs
+++ b/migration/src/lib.rs
@@ -6,7 +6,7 @@ mod m20221024_124701_create_parent;
 mod m20221024_134454_fill_admin;
 mod m20221025_154422_create_session;
 mod m20221027_194728_session_create_user_fk;
-
+mod m20221030_133428_parent_create_candidate_fk;
 pub struct Migrator;
 
 #[async_trait::async_trait]
@@ -19,6 +19,7 @@ impl MigratorTrait for Migrator {
             Box::new(m20221024_134454_fill_admin::Migration::default()),
             Box::new(m20221025_154422_create_session::Migration),
             Box::new(m20221027_194728_session_create_user_fk::Migration),
+            Box::new(m20221030_133428_parent_create_candidate_fk::Migration),
         ]
     }
 }
diff --git a/migration/src/m20221024_124701_create_parent.rs b/migration/src/m20221024_124701_create_parent.rs
index b53148e..99a0b14 100644
--- a/migration/src/m20221024_124701_create_parent.rs
+++ b/migration/src/m20221024_124701_create_parent.rs
@@ -37,7 +37,7 @@ impl MigrationTrait for Migration {
 }
 
 #[derive(Iden)]
-enum Parent {
+pub enum Parent {
     Table,
     Application,
     Name,
diff --git a/migration/src/m20221030_133428_parent_create_candidate_fk.rs b/migration/src/m20221030_133428_parent_create_candidate_fk.rs
new file mode 100644
index 0000000..1459bc5
--- /dev/null
+++ b/migration/src/m20221030_133428_parent_create_candidate_fk.rs
@@ -0,0 +1,26 @@
+use sea_orm_migration::prelude::*;
+
+use crate::{m20221024_124701_create_parent::Parent, m20221024_121621_create_candidate::Candidate};
+
+#[derive(DeriveMigrationName)]
+pub struct Migration;
+
+#[async_trait::async_trait]
+impl MigrationTrait for Migration {
+    async fn up(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+        manager.create_foreign_key(ForeignKey::create()
+            .name("candidate_fk")
+            .from(Parent::Table, Candidate::Application)
+            .to(Parent::Table, Parent::Application)
+            .on_delete(ForeignKeyAction::Cascade)
+            .on_update(ForeignKeyAction::Cascade)
+            .to_owned()).await
+    }
+
+    async fn down(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+        manager.drop_foreign_key(ForeignKey::drop()
+            .name("candidate_fk")
+            .table(Parent::Table)
+            .to_owned()).await
+    }
+}
\ No newline at end of file