fix: remove support of @AddField directive on input types. (#3199)

src/core/config/transformer/flatten_single_field.rs

@@ -58,7 +58,12 @@ impl Transform for FlattenSingleField {
     fn transform(&self, mut config: Self::Value) -> Valid<Self::Value, Self::Error> {
         let origin_config = config.clone();
 
-        for ty in config.types.values_mut() {
+        let input_types = config.input_types();
+
+        for (ty_name, ty) in config.types.iter_mut() {
+            if input_types.contains(ty_name) {
+                continue;
+            }
             for (field_name, field) in ty.fields.iter_mut() {
                 let mut visited_types = HashSet::<String>::new();
                 if let Some(path) = get_single_field_path(

src/core/config/transformer/snapshots/tailcall__core__config__transformer__flatten_single_field__test__type_name_generator_transform.snap

@@ -6,10 +6,14 @@ schema @server @upstream {
   query: Query
 }
 
-type Bar {
+input Bar {
   a: Int
 }
 
+input Input {
+  a: Bar
+}
+
 type Connection {
   user: User
 }
@@ -28,6 +32,7 @@ type NotSingleMiddle {
 }
 
 type Query @addField(name: "foo", path: ["foo", "bar", "a"]) {
+  a(input: Input!): Empty
   foo: Foo @omit
   not_single: NotSingle
   not_single_middle: NotSingleMiddle

tailcall-fixtures/fixtures/configs/flatten_single_field.graphql

@@ -2,11 +2,16 @@ schema {
   query: Query
 }
 
+input Input {
+  a: Bar
+}
+
 type Query {
   foo: Foo
   not_single: NotSingle
   not_single_middle: NotSingleMiddle
   user: User
+  a(input: Input!): Empty
 }
 
 # Type with only one field

tests/cli/snapshots/cli_spec__test__generator_spec__tests__cli__fixtures__generator__gen_json_proto_mix_config.md.snap

@@ -6,8 +6,8 @@ schema @server @upstream {
   query: Query
 }
 
-input GEN__news__MultipleNewsId @addField(name: "ids", path: ["ids", "id"]) {
-  ids: [Id]@omit 
+input GEN__news__MultipleNewsId {
+  ids: [Id]
 }
 
 input GEN__news__NewsInput {

tests/cli/snapshots/cli_spec__test__generator_spec__tests__cli__fixtures__generator__proto-connect-rpc.md.snap

@@ -6,8 +6,8 @@ schema @server @upstream {
   query: Query
 }
 
-input GEN__news__MultipleNewsId @addField(name: "ids", path: ["ids", "id"]) {
-  ids: [Id]@omit 
+input GEN__news__MultipleNewsId {
+  ids: [Id]
 }
 
 input GEN__news__NewsInput {