aliasing when changing one field doesnt drop others

common/build.rs

@@ -38,6 +38,10 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
             ".komp_ac.table_validation.FieldValidation.locked",
             "#[serde(default)]",
         )
+        .field_attribute(
+            ".komp_ac.table_validation.UpdateFieldValidationRequest.update_mask",
+            "#[serde(skip)]",
+        )
         .field_attribute(
             ".komp_ac.table_definition.ColumnDefinition.boolean_ledger",
             "#[serde(default, alias = \"boolean_ledger_operator\")]",

common/proto/table_validation.proto

@@ -2,6 +2,8 @@
 syntax = "proto3";
 package komp_ac.table_validation;
 
+import "google/protobuf/field_mask.proto";
+
 // This proto is the canonical server-side storage and distribution contract for
 // client validation configuration.
 //
@@ -189,6 +191,11 @@ message UpdateFieldValidationRequest {
   string tableName = 2;
   string dataKey = 3;
   FieldValidation validation = 4;
+
+  // Omitted keeps the legacy full-replacement behavior. Otherwise, only the
+  // selected FieldValidation properties are changed; selecting an absent
+  // message property deliberately removes it.
+  google.protobuf.FieldMask update_mask = 5;
 }
 
 message UpdateFieldValidationResponse {

common/src/proto/komp_ac.table_validation.rs

@@ -159,6 +159,12 @@ pub struct UpdateFieldValidationRequest {
     pub data_key: ::prost::alloc::string::String,
     #[prost(message, optional, tag = "4")]
     pub validation: ::core::option::Option<FieldValidation>,
+    /// Omitted keeps the legacy full-replacement behavior. Otherwise, only the
+    /// selected FieldValidation properties are changed; selecting an absent
+    /// message property deliberately removes it.
+    #[prost(message, optional, tag = "5")]
+    #[serde(skip)]
+    pub update_mask: ::core::option::Option<::prost_types::FieldMask>,
 }
 #[derive(serde::Serialize, serde::Deserialize)]
 #[derive(Clone, PartialEq, Eq, Hash, ::prost::Message)]