Fix bug when setting null scaling spec on update (#94)

Author: vandyliu

.github/pull_request_template.md

@@ -14,9 +14,6 @@
 
 ## 📋 Checklist
 
-- [ ] Rebased from the main (or release if patching) branch (before testing)
 - [ ] Added/updated applicable tests
 - [ ] Added/updated examples in the `examples/` directory
-- [ ] Tested against [Astro-API](https://github.com/astronomer/astro/)
-- [ ] Communicated to/tagged owners of respective clients potentially impacted by these changes.
 - [ ] Updated any related [documentation](https://github.com/astronomer/docs/)

internal/provider/resources/resource_deployment.go

@@ -960,8 +960,8 @@ func validateClusterIdConfig(ctx context.Context, data *models.DeploymentResourc
 // RequestScalingSpec converts a Terraform object to a platform.DeploymentScalingSpecRequest to be used in create and update requests
 func RequestScalingSpec(ctx context.Context, scalingSpecObj types.Object) (*platform.DeploymentScalingSpecRequest, diag.Diagnostics) {
 	if scalingSpecObj.IsNull() {
-		// If the scaling spec is not set, return nil for the request
-		return nil, nil
+		// If the scaling spec is not set, return an empty scaling spec for the request
+		return &platform.DeploymentScalingSpecRequest{}, nil
 	}
 	var scalingSpec models.DeploymentScalingSpec
 	diags := scalingSpecObj.As(ctx, &scalingSpec, basetypes.ObjectAsOptions{

internal/provider/resources/resource_deployment_test.go

@@ -438,6 +438,14 @@ func TestAcc_ResourceDeploymentStandardScalingSpec(t *testing.T) {
 					resource.TestCheckNoResourceAttr(scalingSpecResourceVar, "scaling_spec.hibernation_spec.schedules"),
 				),
 			},
+			// Make scaling spec null to test that it is removed from the deployment with no errors
+			{
+				Config: astronomerprovider.ProviderConfig(t, true) + developmentDeployment(scalingSpecDeploymentName,
+					` `),
+				Check: resource.ComposeTestCheckFunc(
+					resource.TestCheckResourceAttr(scalingSpecResourceVar, "scaling_spec.%", "0"),
+				),
+			},
 			{
 				Config: astronomerprovider.ProviderConfig(t, true) + developmentDeployment(scalingSpecDeploymentName,
 					`scaling_spec = {