migrations

blog-server-api/src/main.rs

@@ -2,6 +2,7 @@
 
 mod endpoints;
 mod extensions;
+mod migrations;
 mod router;
 mod utils;
 
@@ -36,44 +37,16 @@ pub async fn init_db() -> rbatis::RBatis {
     let rb = rbatis::RBatis::new();
     rb.init(rbdc_pg::driver::PgDriver {}, PG_URL)
         .expect("DB init failed");
-    migrate_db(&rb).await.expect("DB migration failed");
+    migrations::exec(&rb).await.expect("DB migration failed");
     return rb;
 }
 
-async fn migrate_db(rb: &rbatis::RBatis) -> Result<(), Box<dyn std::error::Error>> {
-    let sql = std::fs::read_to_string("./table_pg.sql")?;
-    rb.exec(&sql, vec![]).await?;
-
-    let posts: Vec<blog_server_services::traits::post_service::Post> =
-        rb.query_decode("select * from post", vec![]).await?;
-    for post in posts {
-        let content = post
-            .base
-            .content
-            .as_ref()
-            .map(|c| blog_server_services::utils::html::clean(c));
-        let plain_text_content = content
-            .as_ref()
-            .map(|c| blog_server_services::utils::html::to_plain(c));
-        rb.query(
-            "update post set content=?, plain_text_content=? where id=?",
-            vec![
-                rbs::to_value!(content),
-                rbs::to_value!(plain_text_content),
-                rbs::to_value!(post.id),
-            ],
-        )
-        .await?;
-    }
-
-    Ok(())
-}
-
 pub async fn init_rabbit(
 ) -> Box<dyn blog_server_services::traits::event_bus_service::EventBusService> {
-    if RABBIT_URL.is_empty() {
-        blog_server_services::impls::create_rabbit_event_bus_service(None).await
+    blog_server_services::impls::create_rabbit_event_bus_service(if RABBIT_URL.is_empty() {
+        None
     } else {
-        blog_server_services::impls::create_rabbit_event_bus_service(Some(RABBIT_URL)).await
-    }
+        Some(RABBIT_URL)
+    })
+    .await
 }

blog-server-api/src/migrations/base.rs

@@ -0,0 +1,6 @@
+pub async fn exec(rb: &rbatis::RBatis) -> Result<(), Box<dyn std::error::Error>> {
+    let sql = std::fs::read_to_string("./table_pg.sql")?;
+    rb.exec(&sql, vec![]).await?;
+
+    Ok(())
+}

blog-server-api/src/migrations/content.rs

@@ -0,0 +1,40 @@
+pub async fn exec(rb: &rbatis::RBatis) -> Result<(), Box<dyn std::error::Error>> {
+    let is_content_migrated: bool = rb
+        .query_decode::<u64>(
+            "select count(1) as count from migration where key='content_migration'",
+            vec![],
+        )
+        .await?
+        > 0;
+
+    if !is_content_migrated {
+        let posts: Vec<blog_server_services::traits::post_service::Post> =
+            rb.query_decode("select * from post", vec![]).await?;
+        for post in posts {
+            let content = post
+                .base
+                .content
+                .as_ref()
+                .map(|c| blog_server_services::utils::html::clean(c));
+            let plain_text_content = content
+                .as_ref()
+                .map(|c| blog_server_services::utils::html::to_plain(c));
+            rb.query(
+                "update post set content=?, plain_text_content=? where id=?",
+                vec![
+                    rbs::to_value!(content),
+                    rbs::to_value!(plain_text_content),
+                    rbs::to_value!(post.id),
+                ],
+            )
+            .await?;
+        }
+        rb.query(
+            "insert into migration (key) values ('content_migration')",
+            vec![],
+        )
+        .await?;
+    }
+
+    Ok(())
+}

blog-server-api/src/migrations/mod.rs

@@ -0,0 +1,8 @@
+mod base;
+mod content;
+
+pub async fn exec(rb: &rbatis::RBatis) -> Result<(), Box<dyn std::error::Error>> {
+    base::exec(rb).await?;
+    content::exec(rb).await?;
+    Ok(())
+}

table_pg.sql

@@ -222,4 +222,15 @@ DO $$ BEGIN
   END IF;
 END $$
 
+;
+
+DO $$ BEGIN
+  IF NOT EXISTS(select * from pg_tables where schemaname = 'public' and tablename = 'migration') THEN
+    CREATE TABLE migration (
+      key VARCHAR(100) NOT NULL,
+      PRIMARY KEY (key)
+    );
+  END IF;
+END $$
+
 ;