特征绑定“FieldAttr：ToTokens”不满足：错误
我想在 EC2(fargate) 上部署 Dockerfile 版本。
我在cloudwatch中遇到以下错误。
“创建池失败。：错误（无）”
我已经想出了解决这个问题的办法。
我在建立连接时将方法从 build 更改为 build_unchecked 。
但是，我收到以下错误并且无法编译。
error[E0277]: the trait bound `FieldAttr: ToTokens` is not satisfied
--> /usr/local/cargo/registry/src/github.com-1ecc6299db9ec823/diesel_derives-2.0.1/src/attrs.rs:143:18
|
143 | impl Spanned for FieldAttr {
| ^^^^^^^^^ the trait `ToTokens` is not implemented for `FieldAttr`
|
= help: the following other types implement trait `ToTokens`:
&'a T
&'a mut T
Abi
Abstract
AndAnd
AndEq
AngleBracketedGenericArguments
Arm
and 312 others
= note: required for `FieldAttr` to implement `quote::spanned::private::Sealed`
note: required by a bound in `quote::spanned::Spanned`
--> /usr/local/cargo/registry/src/github.com-1ecc6299db9ec823/quote-1.0.25/src/spanned.rs:6:20
|
6 | pub trait Spanned: private::Sealed {
| ^^^^^^^^^^^^^^^ required by this bound in `Spanned`
error[E0277]: the trait bound `StructAttr: ToTokens` is not satisfied
--> /usr/local/cargo/registry/src/github.com-1ecc6299db9ec823/diesel_derives-2.0.1/src/attrs.rs:242:18
|
242 | impl Spanned for StructAttr {
| ^^^^^^^^^^ the trait `ToTokens` is not implemented for `StructAttr`
|
= help: the following other types implement trait `ToTokens`:
&'a T
&'a mut T
Abi
Abstract
AndAnd
AndEq
AngleBracketedGenericArguments
Arm
and 312 others
= note: required for `StructAttr` to implement `quote::spanned::private::Sealed`
note: required by a bound in `quote::spanned::Spanned`
--> /usr/local/cargo/registry/src/github.com-1ecc6299db9ec823/quote-1.0.25/src/spanned.rs:6:20
|
6 | pub trait Spanned: private::Sealed {
| ^^^^^^^^^^^^^^^ required by this bound in `Spanned`
For more information about this error, try `rustc --explain E0277`.
error: could not compile `diesel_derives` due to 2 previous errors
warning: build failed, waiting for other jobs to finish...
error: failed to compile `practice-rust v0.1.0 (/usr/src/practice-rust)`, intermediate artifacts can be found at `/usr/src/practice-rust/target`
pub type Pool = r2d2::Pool<ConnectionManager<MysqlConnection>>;
pub fn establish_connection() -> Pool {
dotenv().ok();
std::env::set_var("RUST_LOG", "actix_web=debug");
let database_url = std::env::var("DATABASE_URL").expect("DATABASE_URL must be set");
let manager = ConnectionManager::<MysqlConnection>::new(database_url);
let pool: Pool = r2d2::Pool::builder().build_unchecked(manager);
pool
}
#[actix_web::main]
async fn main() -> std::io::Result<()> {
let pool = db::establish_connection();
HttpServer::new(move|| {
App::new()
.app_data(Data::new(pool.clone()))
.service(todo_index)
})
.bind("0.0.0.0:8080")?
.run()
.await
}
#[get("/api/todo")]
async fn todo_index(db: web::Data<db::Pool>) -> impl Responder {
let mut conn = db.get().unwrap();
let todo = schema::todos::table
.load::<model::Todo>(&mut conn)
.expect("Error not showing todo list");
HttpResponse::Ok().json(todo)
}
我尝试了引用传递，但没有成功。
无需修改即可构建另一个 Dockerfile。 问题出在 Dockerfile 中。
dev:构建完成。
FROM rust:1-slim-buster
RUN apt-get update \
&& apt-get install -y default-libmysqlclient-dev mariadb-client
WORKDIR /usr/src/myapp/practice-rust
COPY . .
stg：无法构建。
FROM rust:1-slim-buster as builder
RUN apt-get update \
&& apt-get install -y --no-install-recommends \
default-libmysqlclient-dev mariadb-client \
&& apt-get -y clean \
&& rm -rf /var/lib/apt/lists/*
WORKDIR /usr/src/practice-rust
COPY . .
RUN cargo install --path .
FROM debian:10.13-slim as stage
RUN apt-get update \
&& apt-get install -y --no-install-recommends \
default-libmysqlclient-dev mariadb-client \
&& apt-get -y clean \
&& rm -rf /var/lib/apt/lists/*
COPY --from=builder /usr/local/cargo/bin/practice-rust /usr/local/bin/practice-rust
CMD [ "practice-rust"]