diff --git a/Cargo.toml b/Cargo.toml
index 680cb04..1504024 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -8,8 +8,13 @@ license = "AGPL-3.0"
 
 [dependencies]
 rocket = { version = "0.5.0-rc.1", features = ["json"] }
-diesel = { version = "1.4.8", features= ["sqlite", "chrono", "r2d2"] }
-chrono = { version="0.4", features=["serde"] }
-rand = "0.8.5"
-dotenv = "0.15.0"
-sha2 = "0.10.2"
+diesel = { version = "1.4.8", features = ["sqlite", "chrono", "r2d2"] }
+redis = { version="0.21.5", features = ["aio", "async-std-comp"] }
+chrono = { version="0.*", features =["serde"] }
+rand = "0.*"
+dotenv = "0.*"
+sha2 = "0.*"
+
+[dependencies.rocket_sync_db_pools]
+version = "0.1.0-rc.1"
+features = ["diesel_sqlite_pool"]
diff --git a/migrations/2022-03-11-065048_create_posts/up.sql b/migrations/2022-03-11-065048_create_posts/up.sql
index 9560e62..91a785a 100644
--- a/migrations/2022-03-11-065048_create_posts/up.sql
+++ b/migrations/2022-03-11-065048_create_posts/up.sql
@@ -6,7 +6,8 @@ CREATE TABLE posts (
   content TEXT NOT NULL,
   cw VARCHAR NOT NULL DEFAULT '',
   author_title VARCHAR NOT NULL DEFAULT '',
-  n_likes INTEGER NOT NULL DEFAULT 0,
+  is_tmp BOOLEAN NOT NULL DEFAULT FALSE,
+  n_attentions INTEGER NOT NULL DEFAULT 0,
   n_comments INTEGER NOT NULL DEFAULT 0,
   create_time TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
   last_comment_time TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
diff --git a/migrations/2022-03-15-104943_create_comments/up.sql b/migrations/2022-03-15-104943_create_comments/up.sql
index 2f87559..68fca2d 100644
--- a/migrations/2022-03-15-104943_create_comments/up.sql
+++ b/migrations/2022-03-15-104943_create_comments/up.sql
@@ -4,11 +4,12 @@ CREATE TABLE comments (
   id INTEGER NOT NULL PRIMARY KEY,
   author_hash VARCHAR NOT NULL,
   author_title VARCHAR(10) NOT NULL DEFAULT '',
+  is_tmp BOOLEAN NOT NULL DEFAULT FALSE,
   content TEXT NOT NULL,
   create_time TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
   is_deleted BOOLEAN NOT NULL DEFAULT FALSE,
   post_id INTEGER NOT NULL,
-  FOREIGN KEY(post_id) REFERENCES post(id)
+  FOREIGN KEY(post_id) REFERENCES posts(id)
 );
 CREATE INDEX comments_postId_idx ON comments (`post_id`);
 
diff --git a/src/api/attention.rs b/src/api/attention.rs
new file mode 100644
index 0000000..911eb9f
--- /dev/null
+++ b/src/api/attention.rs
@@ -0,0 +1,63 @@
+use crate::api::post::ps2outputs;
+use crate::api::{APIError, CurrentUser, MapToAPIError, PolicyError::*, API, UGC};
+use crate::db_conn::Db;
+use crate::models::*;
+use crate::rds_conn::RdsConn;
+use crate::rds_models::*;
+use rocket::form::Form;
+use rocket::serde::json::{json, Value};
+
+#[derive(FromForm)]
+pub struct AttentionInput {
+    pid: i32,
+    #[field(validate = range(0..2))]
+    switch: i32,
+}
+
+#[post("/attention", data = "<ai>")]
+pub async fn attention_post(
+    ai: Form<AttentionInput>,
+    user: CurrentUser,
+    db: Db,
+    rconn: RdsConn,
+) -> API<Value> {
+    user.id.ok_or_else(|| APIError::PcError(NotAllowed))?;
+    let p = Post::get(&db, ai.pid).await.m()?;
+    p.check_permission(&user, "r")?;
+    let mut att = Attention::init(&user.namehash, rconn);
+    let switch_to = ai.switch == 1;
+    let mut delta: i32 = 0;
+    if att.has(ai.pid).await.m()? != switch_to {
+        if switch_to {
+            att.add(ai.pid).await.m()?;
+            delta = 1;
+        } else {
+            att.remove(ai.pid).await.m()?;
+            delta = -1;
+        }
+        p.change_n_attentions(&db, delta).await.m()?;
+    }
+
+    Ok(json!({
+        "code": 0,
+        "attention": ai.switch == 1,
+        "n_attentions": p.n_attentions + delta,
+        // for old version frontend
+        "likenum": p.n_attentions + delta,
+    }))
+}
+
+#[get("/getattention")]
+pub async fn get_attention(user: CurrentUser, db: Db, rconn: RdsConn) -> API<Value> {
+    let ids = Attention::init(&user.namehash, rconn.clone())
+        .all()
+        .await
+        .m()?;
+    let ps = Post::get_multi(&db, ids).await.m()?;
+    let ps_data = ps2outputs(&ps, &user, &db, rconn.clone()).await;
+
+    Ok(json!({
+        "code": 0,
+        "data": ps_data,
+    }))
+}
diff --git a/src/api/comment.rs b/src/api/comment.rs
index 2efc735..b1d372e 100644
--- a/src/api/comment.rs
+++ b/src/api/comment.rs
@@ -1,6 +1,8 @@
-use crate::api::{APIError, CurrentUser, PolicyError::*, API};
-use crate::db_conn::DbConn;
+use crate::api::{APIError, CurrentUser, MapToAPIError, PolicyError::*, API};
+use crate::db_conn::Db;
 use crate::models::*;
+use crate::rds_conn::RdsConn;
+use crate::rds_models::*;
 use chrono::NaiveDateTime;
 use rocket::form::Form;
 use rocket::serde::{
@@ -10,10 +12,10 @@ use rocket::serde::{
 use std::collections::HashMap;
 
 #[derive(FromForm)]
-pub struct CommentInput<'r> {
+pub struct CommentInput {
     pid: i32,
     #[field(validate = len(1..4097))]
-    text: &'r str,
+    text: String,
     use_title: Option<i8>,
 }
 
@@ -24,12 +26,13 @@ pub struct CommentOutput {
     text: String,
     can_del: bool,
     name_id: i32,
+    is_tmp: bool,
     create_time: NaiveDateTime,
     // for old version frontend
     timestamp: i64,
 }
 
-pub fn c2output(p: &Post, cs: &Vec<Comment>, user: &CurrentUser) -> Vec<CommentOutput> {
+pub fn c2output<'r>(p: &'r Post, cs: &Vec<Comment>, user: &CurrentUser) -> Vec<CommentOutput> {
     let mut hash2id = HashMap::<&String, i32>::from([(&p.author_hash, 0)]);
     cs.iter()
         .filter_map(|c| {
@@ -41,19 +44,16 @@ pub fn c2output(p: &Post, cs: &Vec<Comment>, user: &CurrentUser) -> Vec<CommentO
                     x
                 }
             };
-            if false {
+            if c.is_deleted {
                 // TODO: block
                 None
             } else {
                 Some(CommentOutput {
                     cid: c.id,
-                    text: if c.is_deleted {
-                        "[已删除]".to_string()
-                    } else {
-                        c.content.to_string()
-                    },
+                    text: format!("{}{}", if c.is_tmp { "[tmp]\n" } else { "" }, c.content),
                     can_del: user.is_admin || c.author_hash == user.namehash,
                     name_id: name_id,
+                    is_tmp: c.is_tmp,
                     create_time: c.create_time,
                     timestamp: c.create_time.timestamp(),
                 })
@@ -63,35 +63,52 @@ pub fn c2output(p: &Post, cs: &Vec<Comment>, user: &CurrentUser) -> Vec<CommentO
 }
 
 #[get("/getcomment?<pid>")]
-pub fn get_comment(pid: i32, user: CurrentUser, conn: DbConn) -> API<Value> {
-    let p = Post::get(&conn, pid).map_err(APIError::from_db)?;
+pub async fn get_comment(pid: i32, user: CurrentUser, db: Db, rconn: RdsConn) -> API<Value> {
+    let p = Post::get(&db, pid).await.m()?;
     if p.is_deleted {
         return Err(APIError::PcError(IsDeleted));
     }
-    let cs = p.get_comments(&conn).map_err(APIError::from_db)?;
+    let pid = p.id;
+    let cs = Comment::gets_by_post_id(&db, pid).await.m()?;
+    let data = c2output(&p, &cs, &user);
+
     Ok(json!({
         "code": 0,
-        "data": c2output(&p, &cs, &user),
-        "n_likes": p.n_likes,
+        "data": data,
+        "n_attentions": p.n_attentions,
         // for old version frontend
-        "likenum": p.n_likes,
+        "likenum": p.n_attentions,
+        "attention": Attention::init(&user.namehash, rconn.clone()).has(p.id).await.m()? ,
     }))
 }
 
 #[post("/docomment", data = "<ci>")]
-pub fn add_comment(ci: Form<CommentInput>, user: CurrentUser, conn: DbConn) -> API<Value> {
-    let p = Post::get(&conn, ci.pid).map_err(APIError::from_db)?;
+pub async fn add_comment(
+    ci: Form<CommentInput>,
+    user: CurrentUser,
+    db: Db,
+    rconn: RdsConn,
+) -> API<Value> {
+    let p = Post::get(&db, ci.pid).await.m()?;
     Comment::create(
-        &conn,
+        &db,
         NewComment {
-            content: &ci.text,
-            author_hash: &user.namehash,
-            author_title: "",
+            content: ci.text.to_string(),
+            author_hash: user.namehash.to_string(),
+            author_title: "".to_string(),
+            is_tmp: user.id.is_none(),
             post_id: ci.pid,
         },
     )
-    .map_err(APIError::from_db)?;
-    p.after_add_comment(&conn).map_err(APIError::from_db)?;
+    .await
+    .m()?;
+    p.change_n_comments(&db, 1).await.m()?;
+    // auto attention after comment
+    let mut att = Attention::init(&user.namehash, rconn);
+    if !att.has(p.id).await.m()? {
+        att.add(p.id).await.m()?;
+        p.change_n_attentions(&db, 1).await.m()?;
+    }
     Ok(json!({
         "code": 0
     }))
diff --git a/src/api/mod.rs b/src/api/mod.rs
index 60eadf3..30b6faf 100644
--- a/src/api/mod.rs
+++ b/src/api/mod.rs
@@ -1,10 +1,11 @@
-use crate::db_conn::{Conn, DbPool};
+use crate::db_conn::Db;
 use crate::models::*;
 use crate::random_hasher::RandomHasher;
 use rocket::http::Status;
+use rocket::outcome::try_outcome;
 use rocket::request::{FromRequest, Outcome, Request};
 use rocket::response::{self, Responder};
-use rocket::serde::json::json;
+use rocket::serde::json::{json, Value};
 
 #[catch(401)]
 pub fn catch_401_error() -> &'static str {
@@ -36,8 +37,8 @@ impl<'r> FromRequest<'r> for CurrentUser {
                     is_admin: false,
                 });
             } else {
-                let conn = request.rocket().state::<DbPool>().unwrap().get().unwrap();
-                if let Some(user) = User::get_by_token(&conn, token) {
+                let db = try_outcome!(request.guard::<Db>().await);
+                if let Some(user) = User::get_by_token(&db, token).await {
                     let namehash = rh.hash_with_salt(&user.name);
                     cu = Some(CurrentUser {
                         id: Some(user.id),
@@ -55,14 +56,17 @@ impl<'r> FromRequest<'r> for CurrentUser {
     }
 }
 
+#[derive(Debug)]
 pub enum PolicyError {
     IsReported,
     IsDeleted,
     NotAllowed,
 }
 
+#[derive(Debug)]
 pub enum APIError {
     DbError(diesel::result::Error),
+    RdsError(redis::RedisError),
     PcError(PolicyError),
 }
 
@@ -70,16 +74,26 @@ impl APIError {
     fn from_db(err: diesel::result::Error) -> APIError {
         APIError::DbError(err)
     }
+
+    fn from_rds(err: redis::RedisError) -> APIError {
+        APIError::RdsError(err)
+    }
 }
 
 impl<'r> Responder<'r, 'static> for APIError {
     fn respond_to(self, req: &'r Request<'_>) -> response::Result<'static> {
+        dbg!(&self);
         match self {
             APIError::DbError(e) => json!({
                 "code": -1,
                 "msg": e.to_string()
             })
             .respond_to(req),
+            APIError::RdsError(e) => json!({
+                "code": -1,
+                "msg": e.to_string()
+            })
+            .respond_to(req),
             APIError::PcError(e) => json!({
                 "code": -1,
                 "msg": match e {
@@ -93,12 +107,35 @@ impl<'r> Responder<'r, 'static> for APIError {
     }
 }
 
+pub type API<T> = Result<T, APIError>;
+pub type JsonAPI = API<Value>;
+
+pub trait MapToAPIError {
+    type Data;
+    fn m(self) -> API<Self::Data>;
+}
+
+impl<T> MapToAPIError for redis::RedisResult<T> {
+    type Data = T;
+    fn m(self) -> API<Self::Data> {
+        Ok(self.map_err(APIError::from_rds)?)
+    }
+}
+
+impl<T> MapToAPIError for diesel::QueryResult<T> {
+    type Data = T;
+    fn m(self) -> API<Self::Data> {
+        Ok(self.map_err(APIError::from_db)?)
+    }
+}
+
+#[rocket::async_trait]
 pub trait UGC {
     fn get_author_hash(&self) -> &str;
     fn get_is_deleted(&self) -> bool;
     fn get_is_reported(&self) -> bool;
     fn extra_delete_condition(&self) -> bool;
-    fn do_set_deleted(&self, conn: &Conn) -> API<()>;
+    async fn do_set_deleted(&self, db: &Db) -> API<usize>;
     fn check_permission(&self, user: &CurrentUser, mode: &str) -> API<()> {
         if user.is_admin {
             return Ok(());
@@ -118,14 +155,15 @@ pub trait UGC {
         Ok(())
     }
 
-    fn soft_delete(&self, user: &CurrentUser, conn: &Conn) -> API<()> {
+    async fn soft_delete(&self, user: &CurrentUser, db: &Db) -> API<()> {
         self.check_permission(user, "rwd")?;
 
-        self.do_set_deleted(conn)?;
+        let _ = self.do_set_deleted(db).await?;
         Ok(())
     }
 }
 
+#[rocket::async_trait]
 impl UGC for Post {
     fn get_author_hash(&self) -> &str {
         &self.author_hash
@@ -139,11 +177,12 @@ impl UGC for Post {
     fn extra_delete_condition(&self) -> bool {
         self.n_comments == 0
     }
-    fn do_set_deleted(&self, conn: &Conn) -> API<()> {
-        self.set_deleted(conn).map_err(APIError::from_db)
+    async fn do_set_deleted(&self, db: &Db) -> API<usize> {
+        self.set_deleted(db).await.m()
     }
 }
 
+#[rocket::async_trait]
 impl UGC for Comment {
     fn get_author_hash(&self) -> &str {
         &self.author_hash
@@ -157,8 +196,8 @@ impl UGC for Comment {
     fn extra_delete_condition(&self) -> bool {
         true
     }
-    fn do_set_deleted(&self, conn: &Conn) -> API<()> {
-        self.set_deleted(conn).map_err(APIError::from_db)
+    async fn do_set_deleted(&self, db: &Db) -> API<usize> {
+        self.set_deleted(db).await.m()
     }
 }
 
@@ -168,8 +207,7 @@ macro_rules! look {
     };
 }
 
-pub type API<T> = Result<T, APIError>;
-
+pub mod attention;
 pub mod comment;
 pub mod operation;
 pub mod post;
diff --git a/src/api/operation.rs b/src/api/operation.rs
index b9d51a1..25e978f 100644
--- a/src/api/operation.rs
+++ b/src/api/operation.rs
@@ -1,27 +1,28 @@
-use crate::api::{APIError, CurrentUser, PolicyError::*, API, UGC};
-use crate::db_conn::DbConn;
+use crate::api::{APIError, CurrentUser, PolicyError::*, API, UGC, MapToAPIError};
+use crate::db_conn::Db;
 use crate::models::*;
 use rocket::form::Form;
 use rocket::serde::json::{json, Value};
 
 #[derive(FromForm)]
-pub struct DeleteInput<'r> {
+pub struct DeleteInput {
     #[field(name = "type")]
-    id_type: &'r str,
+    id_type: String,
     id: i32,
-    note: &'r str,
+    note: String,
 }
 
 #[post("/delete", data = "<di>")]
-pub fn delete(di: Form<DeleteInput>, user: CurrentUser, conn: DbConn) -> API<Value> {
-    match di.id_type {
+pub async fn delete(di: Form<DeleteInput>, user: CurrentUser, db: Db) -> API<Value> {
+    match di.id_type.as_str() {
         "cid" => {
-            let c = Comment::get(&conn, di.id).map_err(APIError::from_db)?;
-            c.soft_delete(&user, &conn)?;
+            let c = Comment::get(&db, di.id).await.m()?;
+            c.soft_delete(&user, &db).await?;
         }
         "pid" => {
-            let p = Post::get(&conn, di.id).map_err(APIError::from_db)?;
-            p.soft_delete(&user, &conn)?;
+            let p = Post::get(&db, di.id).await.m()?;
+            p.soft_delete(&user, &db).await?;
+            p.change_n_comments(&db, -1).await.m()?;
         }
         _ => return Err(APIError::PcError(NotAllowed)),
     }
diff --git a/src/api/post.rs b/src/api/post.rs
index c5d17c8..78192b9 100644
--- a/src/api/post.rs
+++ b/src/api/post.rs
@@ -1,20 +1,20 @@
 use crate::api::comment::{c2output, CommentOutput};
-use crate::api::{APIError, CurrentUser, PolicyError::*, API, UGC};
-use crate::db_conn::DbConn;
+use crate::api::{APIError, CurrentUser, JsonAPI, MapToAPIError, PolicyError::*, UGC};
+use crate::db_conn::Db;
 use crate::models::*;
+use crate::rds_conn::RdsConn;
+use crate::rds_models::*;
 use chrono::NaiveDateTime;
 use rocket::form::Form;
-use rocket::serde::{
-    json::{json, Value},
-    Serialize,
-};
+use rocket::futures::future;
+use rocket::serde::{json::json, Serialize};
 
 #[derive(FromForm)]
-pub struct PostInput<'r> {
+pub struct PostInput {
     #[field(validate = len(1..4097))]
-    text: &'r str,
+    text: String,
     #[field(validate = len(0..33))]
-    cw: &'r str,
+    cw: String,
     allow_search: Option<i8>,
     use_title: Option<i8>,
 }
@@ -26,7 +26,8 @@ pub struct PostOutput {
     text: String,
     cw: Option<String>,
     custom_title: Option<String>,
-    n_likes: i32,
+    is_tmp: bool,
+    n_attentions: i32,
     n_comments: i32,
     create_time: NaiveDateTime,
     last_comment_time: NaiveDateTime,
@@ -34,6 +35,7 @@ pub struct PostOutput {
     is_reported: Option<bool>,
     comments: Option<Vec<CommentOutput>>,
     can_del: bool,
+    attention: bool,
     // for old version frontend
     timestamp: i64,
     likenum: i32,
@@ -41,23 +43,22 @@ pub struct PostOutput {
 }
 
 #[derive(FromForm)]
-pub struct CwInput<'r> {
+pub struct CwInput {
     pid: i32,
     #[field(validate = len(0..33))]
-    cw: &'r str,
+    cw: String,
 }
 
-fn p2output(p: &Post, user: &CurrentUser, conn: &DbConn) -> PostOutput {
+async fn p2output(p: &Post, user: &CurrentUser, db: &Db, rconn: RdsConn) -> PostOutput {
     PostOutput {
         pid: p.id,
-        text: p.content.to_string(),
-
+        text: format!("{}{}", if p.is_tmp { "[tmp]\n" } else { "" }, p.content),
         cw: if p.cw.len() > 0 {
             Some(p.cw.to_string())
         } else {
             None
         },
-        n_likes: p.n_likes,
+        n_attentions: p.n_attentions,
         n_comments: p.n_comments,
         create_time: p.create_time,
         last_comment_time: p.last_comment_time,
@@ -67,6 +68,7 @@ fn p2output(p: &Post, user: &CurrentUser, conn: &DbConn) -> PostOutput {
         } else {
             None
         },
+        is_tmp: p.is_tmp,
         is_reported: if user.is_admin {
             Some(p.is_reported)
         } else {
@@ -76,34 +78,59 @@ fn p2output(p: &Post, user: &CurrentUser, conn: &DbConn) -> PostOutput {
             None
         } else {
             // 单个洞还有查询评论的接口，这里挂了不用报错
-            Some(c2output(p, &p.get_comments(conn).unwrap_or(vec![]), user))
+            let pid = p.id;
+            if let Some(cs) = Comment::gets_by_post_id(db, pid).await.ok() {
+                Some(c2output(p, &cs, user))
+            } else {
+                None
+            }
         },
         can_del: user.is_admin || p.author_hash == user.namehash,
+        attention: Attention::init(&user.namehash, rconn.clone())
+            .has(p.id)
+            .await
+            .unwrap_or_default(),
         // for old version frontend
         timestamp: p.create_time.timestamp(),
-        likenum: p.n_likes,
+        likenum: p.n_attentions,
         reply: p.n_comments,
     }
 }
 
+pub async fn ps2outputs(
+    ps: &Vec<Post>,
+    user: &CurrentUser,
+    db: &Db,
+    rconn: RdsConn,
+) -> Vec<PostOutput> {
+    future::join_all(
+        ps.iter()
+            .map(|p| async { p2output(p, &user, &db, rconn.clone()).await }),
+    )
+    .await
+}
+
 #[get("/getone?<pid>")]
-pub fn get_one(pid: i32, user: CurrentUser, conn: DbConn) -> API<Value> {
-    let p = Post::get(&conn, pid).map_err(APIError::from_db)?;
+pub async fn get_one(pid: i32, user: CurrentUser, db: Db, rconn: RdsConn) -> JsonAPI {
+    let p = Post::get(&db, pid).await.m()?;
     p.check_permission(&user, "ro")?;
     Ok(json!({
-        "data": p2output(&p, &user, &conn),
+        "data": p2output(&p, &user,&db, rconn).await,
         "code": 0,
     }))
 }
 
 #[get("/getlist?<p>&<order_mode>")]
-pub fn get_list(p: Option<u32>, order_mode: u8, user: CurrentUser, conn: DbConn) -> API<Value> {
+pub async fn get_list(
+    p: Option<u32>,
+    order_mode: u8,
+    user: CurrentUser,
+    db: Db,
+    rconn: RdsConn,
+) -> JsonAPI {
     let page = p.unwrap_or(1);
-    let ps = Post::gets_by_page(&conn, order_mode, page, 25).map_err(APIError::from_db)?;
-    let ps_data = ps
-        .iter()
-        .map(|p| p2output(p, &user, &conn))
-        .collect::<Vec<PostOutput>>();
+    let ps = Post::gets_by_page(&db, order_mode, page, 25).await.m()?;
+    let ps_data = ps2outputs(&ps, &user, &db, rconn.clone()).await;
     Ok(json!({
         "data": ps_data,
         "count": ps_data.len(),
@@ -112,19 +139,22 @@ pub fn get_list(p: Option<u32>, order_mode: u8, user: CurrentUser, conn: DbConn)
 }
 
 #[post("/dopost", data = "<poi>")]
-pub fn publish_post(poi: Form<PostInput>, user: CurrentUser, conn: DbConn) -> API<Value> {
-    dbg!(poi.use_title, poi.allow_search);
+pub async fn publish_post(poi: Form<PostInput>, user: CurrentUser, db: Db) -> JsonAPI {
     let r = Post::create(
-        &conn,
+        &db,
         NewPost {
-            content: &poi.text,
-            cw: &poi.cw,
-            author_hash: &user.namehash,
-            author_title: "",
+            content: poi.text.to_string(),
+            cw: poi.cw.to_string(),
+            author_hash: user.namehash.to_string(),
+            author_title: "".to_string(),
+            is_tmp: user.id.is_none(),
+            n_attentions: 1,
             allow_search: poi.allow_search.is_some(),
         },
     )
-    .map_err(APIError::from_db)?;
+    .await
+    .m()?;
+    // TODO: attention
     Ok(json!({
         "data": r,
         "code": 0
@@ -132,12 +162,23 @@ pub fn publish_post(poi: Form<PostInput>, user: CurrentUser, conn: DbConn) -> AP
 }
 
 #[post("/editcw", data = "<cwi>")]
-pub fn edit_cw(cwi: Form<CwInput>, user: CurrentUser, conn: DbConn) -> API<Value> {
-    let p = Post::get(&conn, cwi.pid).map_err(APIError::from_db)?;
+pub async fn edit_cw(cwi: Form<CwInput>, user: CurrentUser, db: Db) -> JsonAPI {
+    let p = Post::get(&db, cwi.pid).await.m()?;
     if !(user.is_admin || p.author_hash == user.namehash) {
         return Err(APIError::PcError(NotAllowed));
     }
     p.check_permission(&user, "w")?;
-    _ = p.update_cw(&conn, cwi.cw);
+    _ = p.update_cw(&db, cwi.cw.to_string()).await.m()?;
     Ok(json!({"code": 0}))
 }
+
+#[get("/getmulti?<pids>")]
+pub async fn get_multi(pids: Vec<i32>, user: CurrentUser, db: Db, rconn: RdsConn) -> JsonAPI {
+    let ps = Post::get_multi(&db, pids).await.m()?;
+    let ps_data = ps2outputs(&ps, &user, &db, rconn.clone()).await;
+
+    Ok(json!({
+        "code": 0,
+        "data": ps_data,
+    }))
+}
diff --git a/src/api/systemlog.rs b/src/api/systemlog.rs
index 8c879e8..a909a89 100644
--- a/src/api/systemlog.rs
+++ b/src/api/systemlog.rs
@@ -2,10 +2,10 @@ use crate::api::{CurrentUser, API};
 use crate::random_hasher::RandomHasher;
 use rocket::serde::json::{json, Value};
 use rocket::State;
-use crate::db_conn::DbConn;
+use crate::db_conn::Db;
 
 #[get("/systemlog")]
-pub fn get_systemlog(user: CurrentUser, rh: &State<RandomHasher>, conn: DbConn) -> API<Value> {
+pub async fn get_systemlog(user: CurrentUser, rh: &State<RandomHasher>, db: Db) -> API<Value> {
     Ok(json!({
         "tmp_token": rh.get_tmp_token(),
         "salt": look!(rh.salt),
diff --git a/src/db_conn.rs b/src/db_conn.rs
index 642ae55..2a7ef2f 100644
--- a/src/db_conn.rs
+++ b/src/db_conn.rs
@@ -1,38 +1,7 @@
-use diesel::r2d2::{ConnectionManager, Pool, PooledConnection};
-use std::env;
-use std::ops::Deref;
-use rocket::http::Status;
-use rocket::request::{FromRequest, Request, Outcome};
+use rocket_sync_db_pools::{database, diesel};
 
 pub type Conn = diesel::SqliteConnection;
-pub type DbPool = Pool<ConnectionManager<Conn>>;
-pub struct DbConn(pub PooledConnection<ConnectionManager<Conn>>);
 
-#[rocket::async_trait]
-impl<'r> FromRequest<'r> for DbConn {
-    type Error = ();
-    async fn from_request(request: &'r Request<'_>) -> Outcome<Self, Self::Error> {
-        let pool = request.rocket().state::<DbPool>().unwrap();
-        match pool.get() {
-            Ok(conn) => Outcome::Success(DbConn(conn)),
-            Err(_) => Outcome::Failure((Status::ServiceUnavailable, ())),
-        }
-    }
-}
+#[database("sqlite_v2")]
+pub struct Db(Conn);
 
-// For the convenience of using an &DbConn as an &Connection.
-impl Deref for DbConn {
-    type Target = Conn;
-
-    fn deref(&self) -> &Self::Target {
-        &self.0
-    }
-}
-
-pub fn init_pool() -> DbPool {
-    let database_url = env::var("DATABASE_URL").expect("DATABASE_URL must be set");
-    let manager = ConnectionManager::<Conn>::new(database_url);
-    Pool::builder()
-        .build(manager)
-        .expect("database poll init fail")
-}
diff --git a/src/main.rs b/src/main.rs
index d249da2..935178f 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -6,15 +6,18 @@ extern crate diesel;
 
 mod api;
 mod db_conn;
+mod rds_conn;
 mod models;
+mod rds_models;
 mod random_hasher;
 mod schema;
 
-use db_conn::init_pool;
+use db_conn::Db;
+use rds_conn::init_rds_client;
 use random_hasher::RandomHasher;
 
-#[launch]
-fn rocket() -> _ {
+#[rocket::main]
+async fn  main() -> Result<(), rocket::Error> {
     load_env();
     rocket::build()
         .mount(
@@ -26,13 +29,19 @@ fn rocket() -> _ {
                 api::post::get_one,
                 api::post::publish_post,
                 api::post::edit_cw,
+                api::post::get_multi,
+                api::attention::attention_post,
+                api::attention::get_attention,
                 api::systemlog::get_systemlog,
                 api::operation::delete,
             ],
         )
         .register("/_api", catchers![api::catch_401_error])
         .manage(RandomHasher::get_random_one())
-        .manage(init_pool())
+        .manage(init_rds_client().await)
+        .attach(Db::fairing())
+        .launch()
+        .await
 }
 
 fn load_env() {
diff --git a/src/models.rs b/src/models.rs
index 0d88f10..18c6066 100644
--- a/src/models.rs
+++ b/src/models.rs
@@ -1,30 +1,41 @@
 #![allow(clippy::all)]
 
 use chrono::NaiveDateTime;
-use diesel::{insert_into, ExpressionMethods, QueryDsl, RunQueryDsl};
+use diesel::{insert_into, ExpressionMethods, QueryDsl, QueryResult, RunQueryDsl};
 
-use crate::db_conn::Conn;
+use crate::db_conn::Db;
 use crate::schema::*;
 
-type MR<T> = Result<T, diesel::result::Error>;
-
 no_arg_sql_function!(RANDOM, (), "Represents the sql RANDOM() function");
 
 macro_rules! get {
     ($table:ident) => {
-        pub fn get(conn: &Conn, id: i32) -> MR<Self> {
-            $table::table.find(id).first(conn)
+        pub async fn get(db: &Db, id: i32) -> QueryResult<Self> {
+            let pid = id;
+            db.run(move |c| $table::table.find(pid).first(c)).await
+        }
+    };
+}
+
+macro_rules! get_multi {
+    ($table:ident) => {
+        pub async fn get_multi(db: &Db, ids: Vec<i32>) -> QueryResult<Vec<Self>> {
+            db.run(move |c| $table::table.filter($table::id.eq_any(ids)).load(c))
+                .await
         }
     };
 }
 
 macro_rules! set_deleted {
     ($table:ident) => {
-        pub fn set_deleted(&self, conn: &Conn) -> MR<()> {
-            diesel::update(self)
-                .set($table::is_deleted.eq(true))
-                .execute(conn)?;
-            Ok(())
+        pub async fn set_deleted(&self, db: &Db) -> QueryResult<usize> {
+            let pid = self.id;
+            db.run(move |c| {
+                diesel::update($table::table.find(pid))
+                    .set($table::is_deleted.eq(true))
+                    .execute(c)
+            })
+            .await
         }
     };
 }
@@ -36,7 +47,8 @@ pub struct Post {
     pub content: String,
     pub cw: String,
     pub author_title: String,
-    pub n_likes: i32,
+    pub is_tmp: bool,
+    pub n_attentions: i32,
     pub n_comments: i32,
     pub create_time: NaiveDateTime,
     pub last_comment_time: NaiveDateTime,
@@ -48,11 +60,13 @@ pub struct Post {
 
 #[derive(Insertable)]
 #[table_name = "posts"]
-pub struct NewPost<'a> {
-    pub content: &'a str,
-    pub cw: &'a str,
-    pub author_hash: &'a str,
-    pub author_title: &'a str,
+pub struct NewPost {
+    pub content: String,
+    pub cw: String,
+    pub author_hash: String,
+    pub author_title: String,
+    pub is_tmp: bool,
+    pub n_attentions: i32,
     pub allow_search: bool,
     // TODO: tags
 }
@@ -60,48 +74,72 @@ pub struct NewPost<'a> {
 impl Post {
     get!(posts);
 
-    set_deleted!(posts);
+    get_multi!(posts);
 
-    pub fn gets_by_page(conn: &Conn, order_mode: u8, page: u32, page_size: u32) -> MR<Vec<Self>> {
-        let mut query = posts::table.into_boxed();
-        query = query.filter(posts::is_deleted.eq(false));
-        if order_mode > 0 {
-            query = query.filter(posts::is_reported.eq(false))
-        }
+    set_deleted!(posts);
 
-        match order_mode {
-            1 => query = query.order(posts::last_comment_time.desc()),
-            2 => query = query.order(posts::hot_score.desc()),
-            3 => query = query.order(RANDOM),
-            _ => query = query.order(posts::id.desc()),
-        }
-        query
-            .offset(((page - 1) * page_size).into())
-            .limit(page_size.into())
-            .load(conn)
+    pub async fn gets_by_page(
+        db: &Db,
+        order_mode: u8,
+        page: u32,
+        page_size: u32,
+    ) -> QueryResult<Vec<Self>> {
+        db.run(move |c| {
+            let mut query = posts::table.into_boxed();
+            query = query.filter(posts::is_deleted.eq(false));
+            if order_mode > 0 {
+                query = query.filter(posts::is_reported.eq(false))
+            }
+
+            match order_mode {
+                1 => query = query.order(posts::last_comment_time.desc()),
+                2 => query = query.order(posts::hot_score.desc()),
+                3 => query = query.order(RANDOM),
+                _ => query = query.order(posts::id.desc()),
+            }
+
+            query
+                .offset(((page - 1) * page_size).into())
+                .limit(page_size.into())
+                .load(c)
+        })
+        .await
     }
 
-    pub fn get_comments(&self, conn: &Conn) -> MR<Vec<Comment>> {
-        comments::table
-            .filter(comments::post_id.eq(self.id))
-            .load(conn)
+    pub async fn create(db: &Db, new_post: NewPost) -> QueryResult<usize> {
+        // TODO: tags
+        db.run(move |c| insert_into(posts::table).values(&new_post).execute(c))
+            .await
     }
 
-    pub fn create(conn: &Conn, new_post: NewPost) -> MR<usize> {
-        // TODO: tags
-        insert_into(posts::table).values(&new_post).execute(conn)
+    pub async fn update_cw(&self, db: &Db, new_cw: String) -> QueryResult<usize> {
+        let pid = self.id;
+        db.run(move |c| {
+            diesel::update(posts::table.find(pid))
+                .set(posts::cw.eq(new_cw))
+                .execute(c)
+        })
+        .await
     }
 
-    pub fn update_cw(&self, conn: &Conn, new_cw: &str) -> MR<usize> {
-        diesel::update(self).set(posts::cw.eq(new_cw)).execute(conn)
+    pub async fn change_n_comments(&self, db: &Db, delta: i32) -> QueryResult<usize> {
+        let pid = self.id;
+        db.run(move |c| {
+            diesel::update(posts::table.find(pid))
+                .set(posts::n_comments.eq(posts::n_comments + delta))
+                .execute(c)
+        })
+        .await
     }
 
-    pub fn after_add_comment(&self, conn: &Conn) -> MR<()> {
-        diesel::update(self)
-            .set(posts::n_comments.eq(posts::n_comments + 1))
-            .execute(conn)?;
-        // TODO: attention, hot_score
-        Ok(())
+    pub async fn change_n_attentions(&self, db: &Db, delta: i32) -> QueryResult<usize> {
+        let pid = self.id;
+        db.run(move |c| {
+            diesel::update(posts::table.find(pid))
+                .set(posts::n_attentions.eq(posts::n_attentions + delta))
+                .execute(c)
+        })
+        .await
     }
 }
 
@@ -114,8 +152,11 @@ pub struct User {
 }
 
 impl User {
-    pub fn get_by_token(conn: &Conn, token: &str) -> Option<Self> {
-        users::table.filter(users::token.eq(token)).first(conn).ok()
+    pub async fn get_by_token(db: &Db, token: &str) -> Option<Self> {
+        let token = token.to_string();
+        db.run(move |c| users::table.filter(users::token.eq(token)).first(c))
+            .await
+            .ok()
     }
 }
 
@@ -124,6 +165,7 @@ pub struct Comment {
     pub id: i32,
     pub author_hash: String,
     pub author_title: String,
+    pub is_tmp: bool,
     pub content: String,
     pub create_time: NaiveDateTime,
     pub is_deleted: bool,
@@ -132,10 +174,11 @@ pub struct Comment {
 
 #[derive(Insertable)]
 #[table_name = "comments"]
-pub struct NewComment<'a> {
-    pub content: &'a str,
-    pub author_hash: &'a str,
-    pub author_title: &'a str,
+pub struct NewComment {
+    pub content: String,
+    pub author_hash: String,
+    pub author_title: String,
+    pub is_tmp: bool,
     pub post_id: i32,
 }
 
@@ -144,9 +187,14 @@ impl Comment {
 
     set_deleted!(comments);
 
-    pub fn create(conn: &Conn, new_comment: NewComment) -> MR<usize> {
-        insert_into(comments::table)
-            .values(&new_comment)
-            .execute(conn)
+    pub async fn create(db: &Db, new_comment: NewComment) -> QueryResult<usize> {
+        db.run(move |c| insert_into(comments::table).values(&new_comment).execute(c))
+            .await
+    }
+
+    pub async fn gets_by_post_id(db: &Db, post_id: i32) -> QueryResult<Vec<Self>> {
+        let pid = post_id;
+        db.run(move |c| comments::table.filter(comments::post_id.eq(pid)).load(c))
+            .await
     }
 }
diff --git a/src/rds_conn.rs b/src/rds_conn.rs
new file mode 100644
index 0000000..3405345
--- /dev/null
+++ b/src/rds_conn.rs
@@ -0,0 +1,42 @@
+use redis::aio::MultiplexedConnection;
+use rocket::request::{FromRequest, Outcome, Request};
+use std::ops::{Deref, DerefMut};
+use std::env;
+
+pub struct RdsConn(pub MultiplexedConnection);
+
+#[rocket::async_trait]
+impl<'r> FromRequest<'r> for RdsConn {
+    type Error = ();
+    async fn from_request(request: &'r Request<'_>) -> Outcome<Self, Self::Error> {
+        let rconn = request.rocket().state::<MultiplexedConnection>().unwrap();
+        Outcome::Success(RdsConn(rconn.clone()))
+    }
+}
+
+impl Clone for RdsConn {
+    fn clone(&self) -> Self {
+        RdsConn(self.0.clone())
+    }
+}
+
+impl Deref for RdsConn {
+    type Target = MultiplexedConnection;
+
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
+
+impl DerefMut for RdsConn {
+    fn deref_mut(&mut self) -> &mut Self::Target {
+        &mut self.0
+    }
+}
+
+
+pub async fn init_rds_client() -> MultiplexedConnection {
+    let redis_url = env::var("REDIS_URL").expect("REDIS_URL must be set");
+    let client = redis::Client::open(redis_url).expect("connect to redis fail");
+    client.get_multiplexed_async_connection().await.unwrap()
+}
diff --git a/src/rds_models.rs b/src/rds_models.rs
new file mode 100644
index 0000000..5341aec
--- /dev/null
+++ b/src/rds_models.rs
@@ -0,0 +1,32 @@
+use crate::rds_conn::RdsConn;
+use redis::{AsyncCommands, RedisResult};
+
+pub struct Attention {
+    key: String,
+    rconn: RdsConn,
+}
+
+impl Attention {
+    pub fn init(namehash: &str, rconn: RdsConn) -> Self {
+        Attention {
+            key: format!("hole_v2:attention:{}", namehash),
+            rconn: rconn,
+        }
+    }
+
+    pub async fn add(&mut self, pid: i32) -> RedisResult<()> {
+        self.rconn.sadd(&self.key, pid).await
+    }
+
+    pub async fn remove(&mut self, pid: i32) -> RedisResult<()> {
+        self.rconn.srem(&self.key, pid).await
+    }
+
+    pub async fn has(&mut self, pid: i32) -> RedisResult<bool> {
+        self.rconn.sismember(&self.key, pid).await
+    }
+
+    pub async fn all(&mut self) -> RedisResult<Vec<i32>> {
+        self.rconn.smembers(&self.key).await
+    }
+}
diff --git a/src/schema.rs b/src/schema.rs
index abe665a..7e7c600 100644
--- a/src/schema.rs
+++ b/src/schema.rs
@@ -3,6 +3,7 @@ table! {
         id -> Integer,
         author_hash -> Text,
         author_title -> Text,
+        is_tmp -> Bool,
         content -> Text,
         create_time -> Timestamp,
         is_deleted -> Bool,
@@ -17,7 +18,8 @@ table! {
         content -> Text,
         cw -> Text,
         author_title -> Text,
-        n_likes -> Integer,
+        is_tmp -> Bool,
+        n_attentions -> Integer,
         n_comments -> Integer,
         create_time -> Timestamp,
         last_comment_time -> Timestamp,
@@ -37,6 +39,8 @@ table! {
     }
 }
 
+joinable!(comments -> posts (post_id));
+
 allow_tables_to_appear_in_same_query!(
     comments,
     posts,
diff --git a/tools/migdb.py b/tools/migdb.py
index 22dc389..9dd8327 100644
--- a/tools/migdb.py
+++ b/tools/migdb.py
@@ -23,8 +23,9 @@ def mig_post():
         r[7] = datetime.fromtimestamp(r[7])
         r[8] = datetime.fromtimestamp(r[8])
         r[10] = r[10] or False  # comment
+        r.insert(4, r[2].startswith('[tmp]\n'))
         c_new.execute(
-            'INSERT OR REPLACE INTO posts VALUES({})'.format(','.join(['?'] * 13)),
+            'INSERT OR REPLACE INTO posts VALUES({})'.format(','.join(['?'] * 14)),
             r
         )
     db_new.commit()
@@ -42,27 +43,39 @@ def mig_user():
 
 
 def mig_comment():
-    rs = c_old.execute(
-        'SELECT id, name_hash, author_title, content, timestamp, deleted, post_id '
-        'FROM comment'
-    )
-    for r in rs:
-        r = list(r)
-        r[2] = r[2] or ''
-        r[4] = datetime.fromtimestamp(r[4])
-        r[5] = r[5] or False
-        c_new.execute(
-            'INSERT OR REPLACE INTO comments VALUES({})'.format(','.join(['?'] * 7)),
-            r
+    _start = 0
+    _step = 1000
+    while True:
+        print("comment loop...", _start)
+        rs = c_old.execute(
+            'SELECT id, name_hash, author_title, content, timestamp, deleted, post_id '
+            'FROM comment WHERE id > ? ORDER BY id LIMIT ?',
+            (_start, _step)
         )
-    db_new.commit()
+        r = None
+        for r in rs:
+            r = list(r)
+            r[2] = r[2] or ''
+            r[4] = datetime.fromtimestamp(r[4])
+            r[5] = r[5] or False
+            r.insert(2, r[3].startswith('[tmp]\n'))
+            c_new.execute(
+                'INSERT OR REPLACE INTO comments VALUES({})'.format(','.join(['?'] * 8)),
+                r
+            )
+        if not r:
+            break
+        db_new.commit()
+
+        _start = r[0]
 
 
 if __name__ == '__main__':
-    # mig_post()
-    # mig_user()
+    mig_post()
+    mig_user()
     mig_comment()
+    pass
+
 
 c_old.close()
 c_new.close()
-