darayus / iron-diesel-middleware Goto Github PK
View Code? Open in Web Editor NEWMiddleware that provides diesel connections for the Iron web framework
License: MIT License
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No longer builds with diesel 0.8
Compiling with diesel 0.8 fails to typecheck. Attaching cargo log. I had a go at fixing this, but it's not clear to me what's wrong; PgConnection satisfies Connection just fine.
error[E0277]: the trait bound `diesel::pg::PgConnection: diesel::connection::Connection` is not satisfied
--> src\lib.rs:19:3
|
19 | pub pool: DieselPool,
| ^^^^^^^^^^^^^^^^^^^^ trait `diesel::pg::PgConnection: diesel::connection::Connection` not satisfied
|
= note: required because of the requirements on the impl of `r2d2::ManageConnection` for `r2d2_diesel::ConnectionManager<diesel::pg::PgConnection>`
= note: required by `r2d2::Pool`
error[E0277]: the trait bound `diesel::pg::PgConnection: diesel::connection::Connection` is not satisfied
--> src\lib.rs:22:18
|
22 | pub struct Value(DieselPool);
| ^^^^^^^^^^^ trait `diesel::pg::PgConnection: diesel::connection::Connection` not satisfied
|
= note: required because of the requirements on the impl of `r2d2::ManageConnection` for `r2d2_diesel::ConnectionManager<diesel::pg::PgConnection>`
= note: required by `r2d2::Pool`
error[E0277]: the trait bound `diesel::pg::PgConnection: diesel::connection::Connection` is not satisfied
--> src\lib.rs:46:6
|
46 | impl BeforeMiddleware for DieselMiddleware {
| ^^^^^^^^^^^^^^^^ trait `diesel::pg::PgConnection: diesel::connection::Connection` not satisfied
|
= note: required because of the requirements on the impl of `r2d2::ManageConnection` for `r2d2_diesel::ConnectionManager<diesel::pg::PgConnection>`
= note: required because it appears within the type `r2d2::SharedPool<r2d2_diesel::ConnectionManager<diesel::pg::PgConnection>>`
= note: required because of the requirements on the impl of `std::marker::Send` for `std::sync::Arc<r2d2::SharedPool<r2d2_diesel::ConnectionManager<diesel::pg::PgConnection>>>`
= note: required because it appears within the type `r2d2::Pool<r2d2_diesel::ConnectionManager<diesel::pg::PgConnection>>`
= note: required because of the requirements on the impl of `std::marker::Send` for `std::sync::Arc<r2d2::Pool<r2d2_diesel::ConnectionManager<diesel::pg::PgConnection>>>`
= note: required because it appears within the type `DieselMiddleware`
= note: required by `iron::BeforeMiddleware`
error[E0277]: the trait bound `diesel::pg::PgConnection: diesel::connection::Connection` is not satisfied
--> src\lib.rs:75:3
|
75 | fn db_conn(&self) -> r2d2::PooledConnection<r2d2_diesel::ConnectionManager<PgConnection>>;
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ trait `diesel::pg::PgConnection: diesel::connection::Connection` not satisfied
|
= note: required because of the requirements on the impl of `r2d2::ManageConnection` for `r2d2_diesel::ConnectionManager<diesel::pg::PgConnection>`
= note: required by `r2d2::PooledConnection`
error[E0277]: the trait bound `diesel::pg::PgConnection: diesel::connection::Connection` is not satisfied
--> src\lib.rs:79:3
|
79 | fn db_conn(&self) -> r2d2::PooledConnection<r2d2_diesel::ConnectionManager<PgConnection>> {
| ^ trait `diesel::pg::PgConnection: diesel::connection::Connection` not satisfied
|
= note: required because of the requirements on the impl of `r2d2::ManageConnection` for `r2d2_diesel::ConnectionManager<diesel::pg::PgConnection>`
= note: required by `r2d2::PooledConnection`
error: aborting due to 5 previous errors
error: Could not compile `iron_diesel_middleware`.
Use of std::sync::Arc
Hi, I just had a question about why you're wrapping the connection pool with Arc.
The example in the r2d2 readme seems to imply that all you need to do is clone the pool to pass it across a thread boundary. On further inspection, it seems that r2d2's Pool type uses an Arc anyway (see here). Is it not redundant to wrap it again?
I'm new to Rust, so forgive me if I'm missing something obvious.
Example Usage
Could you provide some example usage?
Having trouble building this into my application
I'm learning Rust, so I'm pretty sure this is a dependency / version mismatch, but I have no clue how to diagnose.
Cargo.toml
[dependencies]
time = "0.1.38"
iron = "0.5"
router = "0.5"
mount = "0.3"
params = "0.6"
iron-sessionstorage = "0.6"
staticfile = "0.4"
diesel = { version = ">= 0.16", features = ["postgres"] }
[dependencies.iron_diesel_middleware]
git = "https://github.com/darayus/iron-diesel-middleware"Errors
error[E0277]: the trait bound `r2d2_diesel::ConnectionManager<T>: r2d2::ManageConnection` is not satisfied
--> /home/me/.cargo/git/checkouts/iron-diesel-middleware-aafb02dd5d566e9a/75940b7/src/lib.rs:20:3
|
20 | pub pool: DieselPool<T>,
| ^^^^^^^^^^^^^^^^^^^^^^^ the trait `r2d2::ManageConnection` is not implemented for `r2d2_diesel::ConnectionManager<T>`
|
= note: required by `r2d2::Pool`
error[E0277]: the trait bound `r2d2_diesel::ConnectionManager<T>: r2d2::ManageConnection` is not satisfied
--> /home/me/.cargo/git/checkouts/iron-diesel-middleware-aafb02dd5d566e9a/75940b7/src/lib.rs:23:51
|
23 | pub struct Value<T: 'static + diesel::Connection>(DieselPool<T>);
| ^^^^^^^^^^^^^^ the trait `r2d2::ManageConnection` is not implemented for `r2d2_diesel::ConnectionManager<T>`
|
= note: required by `r2d2::Pool`
error[E0277]: the trait bound `r2d2_diesel::ConnectionManager<T>: r2d2::ManageConnection` is not satisfied in `r2d2::SharedPool<r2d2_diesel::ConnectionManager<T>>`
--> /home/me/.cargo/git/checkouts/iron-diesel-middleware-aafb02dd5d566e9a/75940b7/src/lib.rs:53:29
|
53 | impl<T: diesel::Connection> BeforeMiddleware for DieselMiddleware<T> {
| ^^^^^^^^^^^^^^^^ within `r2d2::SharedPool<r2d2_diesel::ConnectionManager<T>>`, the trait `r2d2::ManageConnection` is not implemented for `r2d2_diesel::ConnectionManager<T>`
|
= note: required because it appears within the type `r2d2::SharedPool<r2d2_diesel::ConnectionManager<T>>`
= note: required because of the requirements on the impl of `std::marker::Send` for `std::sync::Arc<r2d2::SharedPool<r2d2_diesel::ConnectionManager<T>>>`
= note: required because it appears within the type `r2d2::Pool<r2d2_diesel::ConnectionManager<T>>`
= note: required because of the requirements on the impl of `std::marker::Sync` for `std::sync::Arc<r2d2::Pool<r2d2_diesel::ConnectionManager<T>>>`
= note: required because it appears within the type `DieselMiddleware<T>`
error[E0277]: the trait bound `r2d2_diesel::ConnectionManager<T>: r2d2::ManageConnection` is not satisfied
--> /home/me/.cargo/git/checkouts/iron-diesel-middleware-aafb02dd5d566e9a/75940b7/src/lib.rs:82:3
|
82 | fn db_conn(&self) -> r2d2::PooledConnection<r2d2_diesel::ConnectionManager<T>>;
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `r2d2::ManageConnection` is not implemented for `r2d2_diesel::ConnectionManager<T>`
|
= note: required by `r2d2::PooledConnection`
error[E0277]: the trait bound `r2d2_diesel::ConnectionManager<T>: r2d2::ManageConnection` is not satisfied
--> /home/me/.cargo/git/checkouts/iron-diesel-middleware-aafb02dd5d566e9a/75940b7/src/lib.rs:86:3
|
86 | / fn db_conn(&self) -> r2d2::PooledConnection<r2d2_diesel::ConnectionManager<T>> {
87 | | let poll_value = self.extensions.get::<DieselMiddleware<T>>().unwrap();
88 | | let &Value(ref poll) = poll_value;
89 | |
90 | | return poll.get().unwrap();
91 | | }
| |___^ the trait `r2d2::ManageConnection` is not implemented for `r2d2_diesel::ConnectionManager<T>`
|
= note: required by `r2d2::PooledConnection`
error: aborting due to 5 previous errors
error: Could not compile `iron_diesel_middleware`.
Code is just a copy and paste from the README here. I checked the other issues and I do not appear to have duplicates of Iron.
Thanks!
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