init

migration/src/lib.rs

@@ -1,12 +1,16 @@
-pub use sea_orm_migration::prelude::*;
-
-mod m20220101_000001_create_table;
-
-pub struct Migrator;
-
-#[async_trait::async_trait]
-impl MigratorTrait for Migrator {
-    fn migrations() -> Vec<Box<dyn MigrationTrait>> {
-        vec![Box::new(m20220101_000001_create_table::Migration)]
-    }
-}
+pub use sea_orm_migration::prelude::*;
+
+mod m20220101_000001_create_table;
+mod m20260808_000002_add_message_channel_id_id_index;
+
+pub struct Migrator;
+
+#[async_trait::async_trait]
+impl MigratorTrait for Migrator {
+    fn migrations() -> Vec<Box<dyn MigrationTrait>> {
+        vec![
+            Box::new(m20220101_000001_create_table::Migration),
+            Box::new(m20260808_000002_add_message_channel_id_id_index::Migration),
+        ]
+    }
+}

migration/src/m20260808_000002_add_message_channel_id_id_index.rs

@@ -0,0 +1,31 @@
+use sea_orm_migration::prelude::*;
+
+#[derive(DeriveMigrationName)]
+pub struct Migration;
+
+#[async_trait::async_trait]
+impl MigrationTrait for Migration {
+    async fn up(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+        manager
+            .create_index(
+                Index::create()
+                    .name("idx_message_channel_id_id")
+                    .table(Alias::new("message"))
+                    .col(Alias::new("channel_id"))
+                    .col(Alias::new("id"))
+                    .to_owned(),
+            )
+            .await
+    }
+
+    async fn down(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+        manager
+            .drop_index(
+                Index::drop()
+                    .name("idx_message_channel_id_id")
+                    .table(Alias::new("message"))
+                    .to_owned(),
+            )
+            .await
+    }
+}