Correctly update write-only properties.

CHANGELOG.md

@@ -19,6 +19,10 @@ FEATURES:
 * **New Resource:** `awscc_inspectorv2_cis_scan_configuration`
 * **New Resource:** `awscc_qbusiness_data_source`
 
+BUG FIXES:
+
+* Fix `ValidationException: [REPLACE Operation] noSuchPath in source` errors on resource Update ([#1737](https://github.com/hashicorp/terraform-provider-awscc/issues/1737))
+
 ## 0.77.0 (May 16, 2024)
 
 FEATURES:

internal/acctest/testcases.go

@@ -27,13 +27,25 @@ func (td TestData) ResourceTest(t *testing.T, steps []resource.TestStep) {
 	})
 }
 
+func (td TestData) ResourceTestNoProviderFactories(t *testing.T, steps []resource.TestStep) {
+	td.runAcceptanceTestNoProviderFactories(t, resource.TestCase{
+		PreCheck:     func() { PreCheck(t) },
+		CheckDestroy: td.CheckDestroy(),
+		Steps:        steps,
+	})
+}
+
 func (td TestData) runAcceptanceTest(t *testing.T, testCase resource.TestCase) {
-	testCase.ProtoV6ProviderFactories = td.providerFactories()
+	testCase.ProtoV6ProviderFactories = td.ProviderFactories()
+
+	resource.ParallelTest(t, testCase)
+}
 
+func (td TestData) runAcceptanceTestNoProviderFactories(t *testing.T, testCase resource.TestCase) {
 	resource.ParallelTest(t, testCase)
 }
 
-func (td TestData) providerFactories() map[string]func() (tfprotov6.ProviderServer, error) {
+func (td TestData) ProviderFactories() map[string]func() (tfprotov6.ProviderServer, error) {
 	return map[string]func() (tfprotov6.ProviderServer, error){
 		"awscc": providerserver.NewProtocol6WithError(td.provider),
 	}

internal/aws/ec2/launch_template_resource_test.go

@@ -0,0 +1,89 @@
+// Copyright (c) HashiCorp, Inc.
+// SPDX-License-Identifier: MPL-2.0
+
+package ec2_test
+
+import (
+	"fmt"
+	"testing"
+
+	"github.com/hashicorp/terraform-plugin-testing/helper/resource"
+	"github.com/hashicorp/terraform-provider-awscc/internal/acctest"
+)
+
+func TestAccAWSEC2LaunchTemplate_update(t *testing.T) {
+	td := acctest.NewTestData(t, "AWS::EC2::LaunchTemplate", "awscc_ec2_launch_template", "test")
+	resourceName := td.ResourceName
+	rName := td.RandomName()
+	testExternalProviders := map[string]resource.ExternalProvider{
+		"aws": {
+			Source:            "hashicorp/aws",
+			VersionConstraint: "~> 5.50",
+		},
+	}
+
+	td.ResourceTestNoProviderFactories(t, []resource.TestStep{
+		{
+			ProtoV6ProviderFactories: td.ProviderFactories(),
+			ExternalProviders:        testExternalProviders,
+			Config:                   testAccAWSEC2LaunchTemplateInstanceTypeConfig(&td, rName, "t2.large"),
+			Check: resource.ComposeTestCheckFunc(
+				td.CheckExistsInAWS(),
+				resource.TestCheckResourceAttr(resourceName, "launch_template_data.instance_type", "t2.large"),
+			),
+		},
+		{
+			ProtoV6ProviderFactories: td.ProviderFactories(),
+			ExternalProviders:        testExternalProviders,
+			ResourceName:             td.ResourceName,
+			ImportState:              true,
+			ImportStateVerify:        true,
+			ImportStateVerifyIgnore:  []string{"launch_template_data"},
+		},
+		{
+			ProtoV6ProviderFactories: td.ProviderFactories(),
+			ExternalProviders:        testExternalProviders,
+			Config:                   testAccAWSEC2LaunchTemplateInstanceTypeConfig(&td, rName, "t3.large"),
+			Check: resource.ComposeTestCheckFunc(
+				td.CheckExistsInAWS(),
+				resource.TestCheckResourceAttr(resourceName, "launch_template_data.instance_type", "t3.large"),
+			),
+		},
+	})
+}
+
+func testAccAWSEC2LaunchTemplateInstanceTypeConfig(td *acctest.TestData, rName string, instanceType string) string {
+	return fmt.Sprintf(`
+data "aws_ami" "amazon_linux" {
+  most_recent = true
+  owners      = ["amazon"]
+  filter {
+    name   = "name"
+    values = ["amzn2-ami-hvm-*-gp2"]
+  }
+
+  filter {
+    name   = "root-device-type"
+    values = ["ebs"]
+  }
+
+  filter {
+    name   = "virtualization-type"
+    values = ["hvm"]
+  }
+
+  filter {
+    name   = "architecture"
+    values = ["x86_64"]
+  }
+}
+
+resource %[1]q %[2]q {
+  launch_template_data = {
+    image_id      = data.aws_ami.amazon_linux.id
+    instance_type = %[4]q
+  }
+  launch_template_name = %[3]q
+}
+`, td.TerraformResourceType, td.ResourceLabel, rName, instanceType)
+}

internal/generic/resource.go

@@ -19,6 +19,7 @@ import (
 	"github.com/hashicorp/terraform-plugin-framework/resource"
 	"github.com/hashicorp/terraform-plugin-framework/resource/schema"
 	"github.com/hashicorp/terraform-plugin-framework/tfsdk"
+	"github.com/hashicorp/terraform-plugin-go/tftypes"
 	"github.com/hashicorp/terraform-plugin-log/tflog"
 	ccdiag "github.com/hashicorp/terraform-provider-awscc/internal/errs/diag"
 	tfcloudcontrol "github.com/hashicorp/terraform-provider-awscc/internal/service/cloudcontrol"
@@ -522,8 +523,37 @@ func (r *genericResource) Update(ctx context.Context, request resource.UpdateReq
 		return
 	}
 
+	// Clear any write-only values.
+	// This forces patch document generation to always add values.
+	currentStateRaw := currentState.Raw
+	if len(r.writeOnlyAttributePaths) > 0 {
+		currentStateRaw, err = tftypes.Transform(currentStateRaw, func(tfPath *tftypes.AttributePath, val tftypes.Value) (tftypes.Value, error) {
+			if len(tfPath.Steps()) < 1 {
+				return val, nil
+			}
+
+			path, diags := attributePath(ctx, tfPath, currentState.Schema)
+			if diags.HasError() {
+				return val, ccdiag.DiagnosticsError(diags)
+			}
+
+			for _, woPath := range r.writeOnlyAttributePaths {
+				if woPath.Equal(path) {
+					return tftypes.NewValue(val.Type(), nil), nil
+				}
+			}
+
+			return val, nil
+		})
+		if err != nil {
+			response.Diagnostics.Append(DesiredStateErrorDiag("Prior State", err))
+
+			return
+		}
+	}
+
 	translator := toCloudControl{tfToCfNameMap: r.tfToCfNameMap}
-	currentDesiredState, err := translator.AsString(ctx, currentState.Schema, currentState.Raw)
+	currentDesiredState, err := translator.AsString(ctx, currentState.Schema, currentStateRaw)
 
 	if err != nil {
 		response.Diagnostics.Append(DesiredStateErrorDiag("Prior State", err))