Add an `actix` feature to provide a nicer error message (#57)

* Add an `actix` feature to provide a nicer error message
for people migrating from <= 0.8

* Fix tests.

* Bump version in readme.

2 files changed, 15 insertions, 3 deletions

diff --git a/src/actix.rs b/src/actix.rs
index a522a68..a185212 100644
--- a/src/actix.rs
+++ b/src/actix.rs
@@ -60,7 +60,7 @@ impl ResponseError for QsError {
 ///
 /// // Use `QsQuery` extractor for query information.
 /// // The correct request for this handler would be `/users?id[]=1124&id[]=88"`
-/// fn filter_users(info: QsQuery<UsersFilter>) -> HttpResponse {
+/// async fn filter_users(info: QsQuery<UsersFilter>) -> HttpResponse {
 ///     HttpResponse::Ok().body(
 ///         info.id.iter().map(|i| i.to_string()).collect::<Vec<String>>().join(", ")
 ///     )
@@ -164,7 +164,7 @@ where
 /// }
 ///
 /// /// deserialize `Info` from request's querystring
-/// fn index(info: QsQuery<Info>) -> HttpResponse {
+/// async fn index(info: QsQuery<Info>) -> HttpResponse {
 ///     HttpResponse::Ok().body(
 ///         format!("Welcome {}!", info.username)
 ///     )
@@ -184,7 +184,6 @@ where
 ///     );
 /// }
 /// ```
-
 pub struct QsQueryConfig {
     ehandler: Option<Arc<dyn Fn(QsError, &HttpRequest) -> ActixError + Send + Sync>>,
     qs_config: QsConfig,
diff --git a/src/lib.rs b/src/lib.rs
index dd97095..803b401 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -174,6 +174,19 @@ extern crate serde;
 
 #[cfg(any(feature = "actix4", feature = "actix3", feature = "actix2"))]
 pub mod actix;
+
+#[cfg(feature = "actix")]
+compile_error!(
+    r#"The `actix` feature was removed in v0.9 due to the proliferation of actix versions.
+You must now specify the desired actix version by number.
+
+E.g.
+
+serde_qs = { version = "0.9", features = ["actix4"] }
+
+"#
+);
+
 mod de;
 mod error;
 mod ser;