├── .editorconfig ├── .github └── workflows │ └── ci.yml ├── .gitignore ├── Cargo.toml ├── LICENSE-APACHE ├── LICENSE-MIT ├── README.md ├── examples └── simple.rs ├── src └── lib.rs └── tests ├── create_users.sql └── integration_test.rs /.editorconfig: -------------------------------------------------------------------------------- 1 | root = true 2 | 3 | [*] 4 | indent_style = space 5 | indent_size = 4 6 | insert_final_newline = true 7 | trim_trailing_whitespace = true 8 | -------------------------------------------------------------------------------- /.github/workflows/ci.yml: -------------------------------------------------------------------------------- 1 | name: ci 2 | on: 3 | pull_request: 4 | push: 5 | branches: 6 | - master 7 | 8 | jobs: 9 | check: 10 | name: Check 11 | runs-on: ubuntu-latest 12 | steps: 13 | - uses: actions/checkout@v1 14 | - uses: actions-rs/toolchain@v1 15 | with: 16 | toolchain: stable 17 | override: true 18 | - uses: actions-rs/cargo@v1 19 | with: 20 | command: check 21 | 22 | rustfmt: 23 | name: Format 24 | runs-on: ubuntu-latest 25 | steps: 26 | - uses: actions/checkout@v1 27 | - uses: actions-rs/toolchain@v1 28 | with: 29 | toolchain: stable 30 | override: true 31 | - run: rustup component add rustfmt 32 | - uses: actions-rs/cargo@v1 33 | with: 34 | command: fmt 35 | args: --all -- --check 36 | 37 | test: 38 | name: Test Suite 39 | runs-on: ubuntu-latest 40 | services: 41 | postgres: 42 | image: postgres 43 | env: 44 | POSTGRES_USER: postgres 45 | POSTGRES_PASSWORD: postgres 46 | POSTGRES_DB: postgres 47 | POSTGRES_HOST_AUTH_METHOD: trust 48 | ports: 49 | - 5432:5432 50 | # needed because the postgres container does not provide a healthcheck 51 | options: --health-cmd pg_isready --health-interval 10s --health-timeout 5s --health-retries 5 52 | steps: 53 | - name: Checkout sources 54 | uses: actions/checkout@v1 55 | 56 | - name: Install PostgreSQL client 57 | run: sudo apt-get -yqq install libpq-dev 58 | 59 | - name: Install toolchain 60 | uses: actions-rs/toolchain@v1 61 | with: 62 | toolchain: stable 63 | override: true 64 | 65 | - name: Run cargo test 66 | uses: actions-rs/cargo@v1 67 | with: 68 | command: test 69 | env: 70 | POSTGRES_HOST: localhost 71 | POSTGRES_PORT: ${{ job.services.postgres.ports[5432] }} 72 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | target/ 2 | Cargo.lock 3 | -------------------------------------------------------------------------------- /Cargo.toml: -------------------------------------------------------------------------------- 1 | [package] 2 | name = "tokio-diesel" 3 | version = "0.3.0" 4 | authors = ["Ryan Leckey "] 5 | edition = "2018" 6 | description = "Integrate Diesel into Tokio cleanly and efficiently." 7 | repository = "https://github.com/mehcode/tokio-diesel" 8 | license = "MIT/Apache-2.0" 9 | categories = ["asynchronous", "database"] 10 | 11 | [dependencies] 12 | async-trait = "0.1.42" 13 | diesel = { version = "1.4.5", default-features = false, features = ["r2d2"] } 14 | futures = { version = "0.3.8", default-features = false } 15 | r2d2 = "0.8.8" 16 | tokio = { version = "1", default-features = false, features = ["rt-multi-thread"] } 17 | 18 | [dev-dependencies] 19 | diesel = { version = "1.4.4", default-features = false, features = ["postgres", "uuidv07"] } 20 | uuid = { version = "0.8.1", features = ["v4"] } 21 | tokio = { version = "1", default-features = false, features = ["full"] } 22 | -------------------------------------------------------------------------------- /LICENSE-APACHE: -------------------------------------------------------------------------------- 1 | Apache License 2 | Version 2.0, January 2004 3 | http://www.apache.org/licenses/ 4 | 5 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 6 | 7 | 1. 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IN NO EVENT 21 | SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY 22 | CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 23 | OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR 24 | IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 25 | DEALINGS IN THE SOFTWARE. 26 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # Tokio Diesel 2 | > Integrate Diesel into Tokio cleanly and efficiently. 3 | 4 | ## Usage 5 | 6 | See [the example](./examples/simple.rs) for detailed usage information. 7 | 8 | ## License 9 | 10 | Licensed under either of 11 | 12 | * Apache License, Version 2.0 13 | ([LICENSE-APACHE](LICENSE-APACHE) or http://www.apache.org/licenses/LICENSE-2.0) 14 | * MIT license 15 | ([LICENSE-MIT](LICENSE-MIT) or http://opensource.org/licenses/MIT) 16 | 17 | at your option. 18 | 19 | ## Contribution 20 | 21 | Unless you explicitly state otherwise, any contribution intentionally submitted 22 | for inclusion in the work by you, as defined in the Apache-2.0 license, shall be 23 | dual licensed as above, without any additional terms or conditions. 24 | -------------------------------------------------------------------------------- /examples/simple.rs: -------------------------------------------------------------------------------- 1 | #[macro_use] 2 | extern crate diesel; 3 | 4 | use diesel::{ 5 | prelude::*, 6 | r2d2::{ConnectionManager, Pool}, 7 | }; 8 | use std::error::Error; 9 | use tokio_diesel::*; 10 | use uuid::Uuid; 11 | 12 | // Schema 13 | table! { 14 | users (id) { 15 | id -> Uuid, 16 | } 17 | } 18 | 19 | #[tokio::main] 20 | async fn main() -> Result<(), Box> { 21 | // Connect 22 | let manager = 23 | ConnectionManager::::new("postgres://postgres@localhost/tokio_diesel__test"); 24 | let pool = Pool::builder().build(manager)?; 25 | 26 | // Add 27 | println!("add a user"); 28 | diesel::insert_into(users::table) 29 | .values(users::id.eq(Uuid::new_v4())) 30 | .execute_async(&pool) 31 | .await?; 32 | 33 | // Count 34 | let num_users: i64 = users::table.count().get_result_async(&pool).await?; 35 | println!("now there are {:?} users", num_users); 36 | 37 | Ok(()) 38 | } 39 | -------------------------------------------------------------------------------- /src/lib.rs: -------------------------------------------------------------------------------- 1 | use async_trait::async_trait; 2 | use diesel::{ 3 | connection::SimpleConnection, 4 | dsl::Limit, 5 | query_dsl::{ 6 | methods::{ExecuteDsl, LimitDsl, LoadQuery}, 7 | RunQueryDsl, 8 | }, 9 | r2d2::{ConnectionManager, Pool}, 10 | result::QueryResult, 11 | Connection, 12 | }; 13 | use std::{error::Error as StdError, fmt}; 14 | use tokio::task; 15 | 16 | pub type AsyncResult = Result; 17 | 18 | #[derive(Debug)] 19 | pub enum AsyncError { 20 | // Failed to checkout a connection 21 | Checkout(r2d2::Error), 22 | 23 | // The query failed in some way 24 | Error(diesel::result::Error), 25 | } 26 | 27 | pub trait OptionalExtension { 28 | fn optional(self) -> Result, AsyncError>; 29 | } 30 | 31 | impl OptionalExtension for AsyncResult { 32 | fn optional(self) -> Result, AsyncError> { 33 | match self { 34 | Ok(value) => Ok(Some(value)), 35 | Err(AsyncError::Error(diesel::result::Error::NotFound)) => Ok(None), 36 | Err(e) => Err(e), 37 | } 38 | } 39 | } 40 | 41 | impl fmt::Display for AsyncError { 42 | fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { 43 | match *self { 44 | AsyncError::Checkout(ref err) => err.fmt(f), 45 | AsyncError::Error(ref err) => err.fmt(f), 46 | } 47 | } 48 | } 49 | 50 | impl StdError for AsyncError { 51 | fn source(&self) -> Option<&(dyn StdError + 'static)> { 52 | match *self { 53 | AsyncError::Checkout(ref err) => Some(err), 54 | AsyncError::Error(ref err) => Some(err), 55 | } 56 | } 57 | } 58 | 59 | #[async_trait] 60 | pub trait AsyncSimpleConnection 61 | where 62 | Conn: 'static + SimpleConnection, 63 | { 64 | async fn batch_execute_async(&self, query: &str) -> AsyncResult<()>; 65 | } 66 | 67 | #[async_trait] 68 | impl AsyncSimpleConnection for Pool> 69 | where 70 | Conn: 'static + Connection, 71 | { 72 | #[inline] 73 | async fn batch_execute_async(&self, query: &str) -> AsyncResult<()> { 74 | let self_ = self.clone(); 75 | let query = query.to_string(); 76 | task::block_in_place(move || { 77 | let conn = self_.get().map_err(AsyncError::Checkout)?; 78 | conn.batch_execute(&query).map_err(AsyncError::Error) 79 | }) 80 | } 81 | } 82 | 83 | #[async_trait] 84 | pub trait AsyncConnection: AsyncSimpleConnection 85 | where 86 | Conn: 'static + Connection, 87 | { 88 | async fn run(&self, f: Func) -> AsyncResult 89 | where 90 | R: Send, 91 | Func: FnOnce(&Conn) -> QueryResult + Send; 92 | 93 | async fn transaction(&self, f: Func) -> AsyncResult 94 | where 95 | R: Send, 96 | Func: FnOnce(&Conn) -> QueryResult + Send; 97 | } 98 | 99 | #[async_trait] 100 | impl AsyncConnection for Pool> 101 | where 102 | Conn: 'static + Connection, 103 | { 104 | #[inline] 105 | async fn run(&self, f: Func) -> AsyncResult 106 | where 107 | R: Send, 108 | Func: FnOnce(&Conn) -> QueryResult + Send, 109 | { 110 | let self_ = self.clone(); 111 | task::block_in_place(move || { 112 | let conn = self_.get().map_err(AsyncError::Checkout)?; 113 | f(&*conn).map_err(AsyncError::Error) 114 | }) 115 | } 116 | 117 | #[inline] 118 | async fn transaction(&self, f: Func) -> AsyncResult 119 | where 120 | R: Send, 121 | Func: FnOnce(&Conn) -> QueryResult + Send, 122 | { 123 | let self_ = self.clone(); 124 | task::block_in_place(move || { 125 | let conn = self_.get().map_err(AsyncError::Checkout)?; 126 | conn.transaction(|| f(&*conn)).map_err(AsyncError::Error) 127 | }) 128 | } 129 | } 130 | 131 | #[async_trait] 132 | pub trait AsyncRunQueryDsl 133 | where 134 | Conn: 'static + Connection, 135 | { 136 | async fn execute_async(self, asc: &AsyncConn) -> AsyncResult 137 | where 138 | Self: ExecuteDsl; 139 | 140 | async fn load_async(self, asc: &AsyncConn) -> AsyncResult> 141 | where 142 | U: Send, 143 | Self: LoadQuery; 144 | 145 | async fn get_result_async(self, asc: &AsyncConn) -> AsyncResult 146 | where 147 | U: Send, 148 | Self: LoadQuery; 149 | 150 | async fn get_results_async(self, asc: &AsyncConn) -> AsyncResult> 151 | where 152 | U: Send, 153 | Self: LoadQuery; 154 | 155 | async fn first_async(self, asc: &AsyncConn) -> AsyncResult 156 | where 157 | U: Send, 158 | Self: LimitDsl, 159 | Limit: LoadQuery; 160 | } 161 | 162 | #[async_trait] 163 | impl AsyncRunQueryDsl>> for T 164 | where 165 | T: Send + RunQueryDsl, 166 | Conn: 'static + Connection, 167 | { 168 | async fn execute_async(self, asc: &Pool>) -> AsyncResult 169 | where 170 | Self: ExecuteDsl, 171 | { 172 | asc.run(|conn| self.execute(&*conn)).await 173 | } 174 | 175 | async fn load_async(self, asc: &Pool>) -> AsyncResult> 176 | where 177 | U: Send, 178 | Self: LoadQuery, 179 | { 180 | asc.run(|conn| self.load(&*conn)).await 181 | } 182 | 183 | async fn get_result_async(self, asc: &Pool>) -> AsyncResult 184 | where 185 | U: Send, 186 | Self: LoadQuery, 187 | { 188 | asc.run(|conn| self.get_result(&*conn)).await 189 | } 190 | 191 | async fn get_results_async(self, asc: &Pool>) -> AsyncResult> 192 | where 193 | U: Send, 194 | Self: LoadQuery, 195 | { 196 | asc.run(|conn| self.get_results(&*conn)).await 197 | } 198 | 199 | async fn first_async(self, asc: &Pool>) -> AsyncResult 200 | where 201 | U: Send, 202 | Self: LimitDsl, 203 | Limit: LoadQuery, 204 | { 205 | asc.run(|conn| self.first(&*conn)).await 206 | } 207 | } 208 | -------------------------------------------------------------------------------- /tests/create_users.sql: -------------------------------------------------------------------------------- 1 | CREATE table users (id uuid); 2 | -------------------------------------------------------------------------------- /tests/integration_test.rs: -------------------------------------------------------------------------------- 1 | #[macro_use] 2 | extern crate diesel; 3 | 4 | use diesel::{ 5 | prelude::*, 6 | r2d2::{ConnectionManager, Pool}, 7 | sql_query, 8 | }; 9 | use std::error::Error; 10 | use tokio_diesel::*; 11 | use uuid::Uuid; 12 | 13 | // Schema 14 | table! { 15 | users (id) { 16 | id -> Uuid, 17 | } 18 | } 19 | 20 | #[tokio::test(flavor = "multi_thread")] 21 | async fn test_db_ops() -> Result<(), Box> { 22 | let manager = ConnectionManager::::new("postgres://postgres@localhost"); 23 | let pool = Pool::builder().build(manager)?; 24 | 25 | let _ = sql_query(include_str!("./create_users.sql")) 26 | .execute_async(&pool) 27 | .await; 28 | 29 | // Add 30 | println!("add a user"); 31 | diesel::insert_into(users::table) 32 | .values(users::id.eq(Uuid::new_v4())) 33 | .execute_async(&pool) 34 | .await?; 35 | 36 | // Count 37 | let num_users: i64 = users::table.count().get_result_async(&pool).await?; 38 | println!("now there are {:?} users", num_users); 39 | 40 | assert!(num_users > 0); 41 | 42 | Ok(()) 43 | } 44 | --------------------------------------------------------------------------------