feat(migration): update database foreign key constraint

default behavior is set to null

Cargo.toml

@@ -58,6 +58,7 @@ sea-orm = { workspace = true, features = [
     "sqlx-postgres",
     "runtime-tokio-rustls",
     "with-uuid",
+    "macros",
 ] }
 tokio = { workspace = true, features = ["signal", "rt-multi-thread"] }
 axum-extra = { workspace = true, features = ["typed-header"] }

migration/src/m20241014_000002_create_table_upload.rs

@@ -1,5 +1,7 @@
 use sea_orm_migration::prelude::*;
 
+use super::m20241012_000001_create_table_user::User;
+
 pub struct Migration;
 
 impl MigrationName for Migration {
@@ -11,19 +13,37 @@ impl MigrationName for Migration {
 #[async_trait::async_trait]
 impl MigrationTrait for Migration {
     async fn up(&self, manager: &SchemaManager) -> Result<(), DbErr> {
-        manager
+        let _ = manager
             .create_table(
                 Table::create()
                     .table(Upload::Table)
                     .col(ColumnDef::new(Upload::Uuid).uuid().primary_key())
                     .col(ColumnDef::new(Upload::Typ).string().not_null())
                     .to_owned(),
             )
+            .await;
+        manager
+            .create_foreign_key(
+                ForeignKey::create()
+                    .from(User::Table, User::Avatar)
+                    .to(Upload::Table, Upload::Uuid)
+                    .on_delete(ForeignKeyAction::SetNull)
+                    .on_update(ForeignKeyAction::SetNull)
+                    .name("FK_USER_AVATAR_UPLOAD")
+                    .to_owned(),
+            )
             .await
     }
 
-    // Define how to rollback this migration: Drop the Bakery table.
     async fn down(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+        let _ = manager
+            .drop_foreign_key(
+                ForeignKey::drop()
+                    .name("FK_USER_AVATAR_UPLOAD")
+                    .table(User::Table)
+                    .to_owned(),
+            )
+            .await;
         manager
             .drop_table(Table::drop().table(Upload::Table).to_owned())
             .await

src/entity/upload.rs

@@ -11,6 +11,15 @@ pub struct Model {
 }
 
 #[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]
-pub enum Relation {}
+pub enum Relation {
+    #[sea_orm(has_many = "super::user::Entity")]
+    User,
+}
+
+impl Related<super::user::Entity> for Entity {
+    fn to() -> RelationDef {
+        Relation::User.def()
+    }
+}
 
 impl ActiveModelBehavior for ActiveModel {}

src/entity/user.rs

@@ -24,6 +24,21 @@ pub struct Model {
 }
 
 #[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]
-pub enum Relation {}
+pub enum Relation {
+    #[sea_orm(
+        belongs_to = "super::upload::Entity",
+        from = "Column::Avatar",
+        to = "super::upload::Column::Uuid",
+        on_update = "SetNull",
+        on_delete = "SetNull"
+    )]
+    Upload,
+}
+
+impl Related<super::upload::Entity> for Entity {
+    fn to() -> RelationDef {
+        Relation::Upload.def()
+    }
+}
 
 impl ActiveModelBehavior for ActiveModel {}