diff --git a/backend/api_server/src/blog/cron/check_update.rs b/backend/api_server/src/blog/cron/check_update.rs
index 3a9f6b8..ef1eca0 100644
--- a/backend/api_server/src/blog/cron/check_update.rs
+++ b/backend/api_server/src/blog/cron/check_update.rs
@@ -1,4 +1,6 @@
-pub fn task() {
+use sqlx::{Pool, Postgres};
+
+pub fn task(db_connection: &Pool<Postgres>) {
     // get dir
     // let git_work_dir_path = &env::var("GIT_WORK_DIR").unwrap_or_else(|e| {
     //     if let Ok(default_log_path) = env::var("WORK_DIR") {
diff --git a/backend/api_server/src/blog/cron/mod.rs b/backend/api_server/src/blog/cron/mod.rs
index 5f06dc5..71581de 100644
--- a/backend/api_server/src/blog/cron/mod.rs
+++ b/backend/api_server/src/blog/cron/mod.rs
@@ -1,10 +1,14 @@
 use crate::scheduler::tasks::basic::BasicTask;
 use crate::scheduler::tasks::Task;
+use sqlx::{Pool, Postgres};
 
 pub mod check_update;
 
-pub fn get_tasks() -> Vec<Box<dyn Task>> {
-    vec![BasicTask::new(check_update::task, "* * * * * *")
-        .unwrap()
-        .to_task()]
+pub fn get_tasks(db_connection: Pool<Postgres>) -> Vec<Box<dyn Task>> {
+    let db_conn_clone = db_connection.clone();
+    vec![
+        BasicTask::new(move || check_update::task(&db_conn_clone), "* * * * * *")
+            .unwrap()
+            .to_task(),
+    ]
 }
diff --git a/backend/api_server/src/init/cron.rs b/backend/api_server/src/init/cron.rs
index 5b17651..429537a 100644
--- a/backend/api_server/src/init/cron.rs
+++ b/backend/api_server/src/init/cron.rs
@@ -1,9 +1,10 @@
 use crate::blog;
 use crate::scheduler::Scheduler;
+use sqlx::{Pool, Postgres};
 
-pub fn start() {
+pub fn start(db_pool: Pool<Postgres>) {
     let scheduler = Scheduler::new();
-    let _ = vec![blog::cron::get_tasks()]
+    let _ = vec![blog::cron::get_tasks(db_pool.clone())]
         .into_iter()
         .map(|list| scheduler.insert_list(list))
         .collect::<Vec<_>>();
diff --git a/backend/api_server/src/init/mod.rs b/backend/api_server/src/init/mod.rs
index f2d02fb..2332914 100644
--- a/backend/api_server/src/init/mod.rs
+++ b/backend/api_server/src/init/mod.rs
@@ -1,6 +1,7 @@
 mod cron;
 mod database;
 pub mod logger;
+mod schema;
 pub mod server;
 
 use macros::panic_with_log;
@@ -39,9 +40,10 @@ pub async fn start() {
     };
 
     // schema init
+    schema::init(&db_pool).await;
 
     // load cron task
-    cron::start();
+    cron::start(db_pool.clone());
 
     // api serve
     match server::start(db_pool).await {
diff --git a/backend/api_server/src/init/schema.rs b/backend/api_server/src/init/schema.rs
new file mode 100644
index 0000000..41ccb34
--- /dev/null
+++ b/backend/api_server/src/init/schema.rs
@@ -0,0 +1,49 @@
+use sqlx::{query, Pool, Postgres};
+use tracing::info;
+
+const POST_BASE_MODEL: &str = r##"
+CREATE TABLE IF NOT EXISTS Post
+(
+    post_id      UUID PRIMARY KEY,
+    title        VARCHAR(255) NOT NULL,
+    category     VARCHAR(255) NOT NULL,
+    header_img   TEXT,
+    summary      TEXT,
+    sub_title    TEXT,
+    content      TEXT         NOT NULL,
+    last_update  TIMESTAMPTZ  NOT NULL,
+    first_update TIMESTAMPTZ  NOT NULL
+);
+"##;
+
+// base model, will add more cols at runtime
+const POST_META_MODEL: &str = r##"
+CREATE TABLE IF NOT EXISTS Meta
+(
+    post_id      UUID PRIMARY KEY
+);
+"##;
+
+const POST_HASH_MODEL: &str = r##"
+CREATE TABLE IF NOT EXISTS Hash
+(
+    post_id      UUID PRIMARY KEY,
+    hash         VARCHAR(44)
+);
+"##;
+
+const TAG_MODEL: &str = r##"
+CREATE TABLE IF NOT EXISTS Tag
+(
+    post_id UUID         NOT NULL,
+    tag     VARCHAR(255) NOT NULL
+);
+"##;
+
+pub async fn init(db_connection: &Pool<Postgres>) {
+    query(POST_BASE_MODEL).execute(db_connection).await.unwrap();
+    query(POST_META_MODEL).execute(db_connection).await.unwrap();
+    query(TAG_MODEL).execute(db_connection).await.unwrap();
+    query(POST_HASH_MODEL).execute(db_connection).await.unwrap();
+    info!("database schema initialized");
+}
diff --git a/backend/markdown/src/lib.rs b/backend/markdown/src/lib.rs
index ce6345f..b1e3562 100644
--- a/backend/markdown/src/lib.rs
+++ b/backend/markdown/src/lib.rs
@@ -15,11 +15,11 @@ use crate::utils::front_matter::{parse_front_matter, split_md_front_matter};
 
 #[derive(Default, Debug, Serialize)]
 pub struct MdFile {
-    file_id: Uuid,
-    file_name: String,
-    meta: Value,
-    content: String,
-    hash: String,
+    pub file_id: Uuid,
+    pub file_name: String,
+    pub meta: Value,
+    pub content: String,
+    pub hash: String,
 }
 
 impl MdFile {