Merge 7f57a87d78 into 024addfc40

Bumps [serde_json](https://github.com/serde-rs/json) from 1.0.145 to 1.0.148.
- [Release notes](https://github.com/serde-rs/json/releases)
- [Commits](https://github.com/serde-rs/json/compare/v1.0.145...v1.0.148)

---
updated-dependencies:
- dependency-name: serde_json
  dependency-version: 1.0.148
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Cargo.lock

@@ -1833,9 +1833,9 @@ dependencies = [
 
 [[package]]
 name = "itoa"
-version = "1.0.15"
+version = "1.0.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4a5f13b858c8d314ee3e8f639011f7ccefe71f97f96e50151fb991f267928e2c"
+checksum = "92ecc6618181def0457392ccd0ee51198e065e016d1d527a7ac1b6dc7c1f09d2"
 
 [[package]]
 name = "jiff"
@@ -2697,15 +2697,15 @@ dependencies = [
 
 [[package]]
 name = "serde_json"
-version = "1.0.145"
+version = "1.0.148"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "402a6f66d8c709116cf22f558eab210f5a50187f702eb4d7e5ef38d9a7f1c79c"
+checksum = "3084b546a1dd6289475996f182a22aba973866ea8e8b02c51d9f46b1336a22da"
 dependencies = [
  "itoa",
  "memchr",
- "ryu",
  "serde",
  "serde_core",
+ "zmij",
 ]
 
 [[package]]
@@ -3192,9 +3192,9 @@ checksum = "df8b2b54733674ad286d16267dcfc7a71ed5c776e4ac7aa3c3e2561f7c637bf2"
 
 [[package]]
 name = "tracing"
-version = "0.1.43"
+version = "0.1.44"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2d15d90a0b5c19378952d479dc858407149d7bb45a14de0142f6c534b16fc647"
+checksum = "63e71662fa4b2a2c3a26f570f037eb95bb1f85397f3cd8076caed2f026a6d100"
 dependencies = [
  "log",
  "pin-project-lite",
@@ -3215,9 +3215,9 @@ dependencies = [
 
 [[package]]
 name = "tracing-core"
-version = "0.1.35"
+version = "0.1.36"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7a04e24fab5c89c6a36eb8558c9656f30d81de51dfa4d3b45f26b21d61fa0a6c"
+checksum = "db97caf9d906fbde555dd62fa95ddba9eecfd14cb388e4f491a66d74cd5fb79a"
 dependencies = [
  "once_cell",
 ]
@@ -3872,6 +3872,12 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "zmij"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0f4a4e8e9dc5c62d159f04fcdbe07f4c3fb710415aab4754bf11505501e3251d"
+
 [[package]]
 name = "zstd"
 version = "0.13.3"

actix-multipart/src/form/mod.rs

@@ -187,6 +187,45 @@ where
     }
 }
 
+impl<'t, T> FieldGroupReader<'t> for Option<Vec<T>>
+where
+    T: FieldReader<'t>,
+{
+    type Future = LocalBoxFuture<'t, Result<(), MultipartError>>;
+
+    fn handle_field(
+        req: &'t HttpRequest,
+        field: Field,
+        limits: &'t mut Limits,
+        state: &'t mut State,
+        _duplicate_field: DuplicateField,
+    ) -> Self::Future {
+        let field_name = field.name().unwrap().to_string();
+
+        Box::pin(async move {
+            let vec = state
+                .entry(field_name)
+                .or_insert_with(|| Box::<Vec<T>>::default())
+                .downcast_mut::<Vec<T>>()
+                .unwrap();
+
+            let item = T::read_field(req, field, limits).await?;
+            vec.push(item);
+
+            Ok(())
+        })
+    }
+
+    fn from_state(name: &str, state: &'t mut State) -> Result<Self, MultipartError> {
+        if let Some(boxed_vec) = state.remove(name) {
+            let vec = *boxed_vec.downcast::<Vec<T>>().unwrap();
+            Ok(Some(vec))
+        } else {
+            Ok(None)
+        }
+    }
+}
+
 /// Trait that allows a type to be used in the [`struct@MultipartForm`] extractor.
 ///
 /// You should use the [`macro@MultipartForm`] macro to derive this for your struct.