Merge pull request #381 from o0Ignition0o/igni/input_variable_case

Allow to parse camel case input variables from .graphql files and generate snake_case variables in Rust

Author: tomhoule

graphql_client/tests/input_object_variables.rs

@@ -74,6 +74,24 @@ fn recursive_input_objects_can_be_constructed() {
     };
 }
 
+#[derive(GraphQLQuery)]
+#[graphql(
+    query_path = "tests/input_object_variables/input_object_variables_query.graphql",
+    schema_path = "tests/input_object_variables/input_object_variables_schema.graphql",
+    response_derives = "Debug, PartialEq"
+)]
+pub struct InputCaseTestsQuery;
+
+#[test]
+fn input_objects_are_all_snake_case() {
+    use input_case_tests_query::*;
+
+    let _ = CaseTestInput {
+        field_with_snake_case: "hello from".to_string(),
+        other_field_with_camel_case: "the other side".to_string(),
+    };
+}
+
 #[derive(GraphQLQuery)]
 #[graphql(
     query_path = "tests/input_object_variables/input_object_variables_query.graphql",

graphql_client/tests/input_object_variables/input_object_variables_query.graphql

@@ -11,3 +11,7 @@ query RecursiveInputQuery($input: RecursiveInput!) {
 query IndirectlyRecursiveInputQuery($input: IndirectlyRecursiveInput!) {
   saveRecursiveInput(recursiveInput: $input)
 }
+
+query InputCaseTestsQuery($input: CaseTestInput!) {
+  testQueryCase(caseTestInput: $input)
+}

graphql_client/tests/input_object_variables/input_object_variables_schema.graphql

@@ -39,8 +39,18 @@ input IndirectlyRecursiveInputTailPart {
   recursed_field: IndirectlyRecursiveInput
 }
 
+input CaseTestInput {
+  field_with_snake_case: String!
+  otherFieldWithCamelCase: String!
+}
+
+type CaseTestResult {
+  result: String!
+}
+
 type InputObjectVariablesQuery {
   echo(message: Message!, options: Options = { pgpSignature: true }): EchoResult
+  testQueryCase(caseTestInput: CaseTestInput!): CaseTestResult
   saveRecursiveInput(recursiveInput: RecursiveInput!): Category
 }
 

graphql_client_codegen/src/codegen/inputs.rs

@@ -4,6 +4,7 @@ use crate::{
     query::{BoundQuery, UsedTypes},
     schema::input_is_recursive_without_indirection,
 };
+use heck::SnakeCase;
 use proc_macro2::{Ident, Span, TokenStream};
 use quote::quote;
 
@@ -21,7 +22,7 @@ pub(super) fn generate_input_object_definitions(
             let struct_name = Ident::new(safe_name.as_ref(), Span::call_site());
 
             let fields = input.fields.iter().map(|(field_name, field_type)| {
-                let safe_field_name = keyword_replace(field_name);
+                let safe_field_name = keyword_replace(field_name.to_snake_case());
                 let annotation = field_rename_annotation(field_name, safe_field_name.as_ref());
                 let name_ident = Ident::new(safe_field_name.as_ref(), Span::call_site());
                 let normalized_field_type_name = options