Fix datasource hostname decode against full config objects

internal/provider/config_hostname.go

@@ -1,41 +1,20 @@
 package provider
 
 import (
+	"context"
 	"fmt"
 
+	"github.com/hashicorp/terraform-plugin-framework/path"
 	"github.com/hashicorp/terraform-plugin-framework/tfsdk"
 	"github.com/hashicorp/terraform-plugin-framework/types"
-	"github.com/hashicorp/terraform-plugin-go/tftypes"
 )
 
-func hostnameFromConfig(config tfsdk.Config) (types.String, error) {
-	if !config.Raw.IsKnown() {
-		return types.StringUnknown(), nil
-	}
-	if config.Raw.IsNull() {
-		return types.StringNull(), nil
+func hostnameFromConfig(ctx context.Context, config tfsdk.Config) (types.String, error) {
+	var hostname types.String
+	diags := config.GetAttribute(ctx, path.Root("hostname"), &hostname)
+	if diags.HasError() {
+		return types.StringNull(), fmt.Errorf("decode hostname from data source config: %s", diags.Errors()[0].Summary())
 	}
 
-	attributes := map[string]tftypes.Value{}
-	if err := config.Raw.As(&attributes); err != nil {
-		return types.StringNull(), fmt.Errorf("decode data source config object: %w", err)
-	}
-
-	hostnameValue, ok := attributes["hostname"]
-	if !ok {
-		return types.StringNull(), fmt.Errorf("hostname is missing from data source config")
-	}
-	if !hostnameValue.IsKnown() {
-		return types.StringUnknown(), nil
-	}
-	if hostnameValue.IsNull() {
-		return types.StringNull(), nil
-	}
-
-	var hostname string
-	if err := hostnameValue.As(&hostname); err != nil {
-		return types.StringNull(), fmt.Errorf("decode hostname: %w", err)
-	}
-
-	return types.StringValue(hostname), nil
+	return hostname, nil
 }

internal/provider/config_hostname_test.go

@@ -0,0 +1,60 @@
+package provider
+
+import (
+	"context"
+	"testing"
+
+	"github.com/hashicorp/terraform-plugin-framework/datasource"
+	"github.com/hashicorp/terraform-plugin-framework/tfsdk"
+	"github.com/hashicorp/terraform-plugin-go/tftypes"
+)
+
+func TestHostnameFromConfigIgnoresComputedAttributesDomain(t *testing.T) {
+	ds := NewDomainDataSource().(*domainDataSource)
+	var schemaResp datasource.SchemaResponse
+	ds.Schema(context.Background(), datasource.SchemaRequest{}, &schemaResp)
+
+	configType := tftypes.Object{AttributeTypes: map[string]tftypes.Type{
+		"hostname": tftypes.String,
+		"domain": tftypes.DynamicPseudoType,
+	}}
+	configValue := tftypes.NewValue(configType, map[string]tftypes.Value{
+		"hostname": tftypes.NewValue(tftypes.String, "www.example.com"),
+		"domain":   tftypes.NewValue(tftypes.DynamicPseudoType, tftypes.UnknownValue),
+	})
+
+	hostname, err := hostnameFromConfig(context.Background(), tfsdk.Config{Schema: schemaResp.Schema, Raw: configValue})
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if hostname.ValueString() != "www.example.com" {
+		t.Fatalf("unexpected hostname: %q", hostname.ValueString())
+	}
+}
+
+func TestHostnameFromConfigIgnoresComputedAttributesDNSRecords(t *testing.T) {
+	ds := NewDNSRecordsDataSource().(*dnsRecordsDataSource)
+	var schemaResp datasource.SchemaResponse
+	ds.Schema(context.Background(), datasource.SchemaRequest{}, &schemaResp)
+
+	configType := tftypes.Object{AttributeTypes: map[string]tftypes.Type{
+		"hostname":    tftypes.String,
+		"domain_id":   tftypes.Number,
+		"domain_name": tftypes.String,
+		"records":     tftypes.DynamicPseudoType,
+	}}
+	configValue := tftypes.NewValue(configType, map[string]tftypes.Value{
+		"hostname":    tftypes.NewValue(tftypes.String, "www.example.com"),
+		"domain_id":   tftypes.NewValue(tftypes.Number, tftypes.UnknownValue),
+		"domain_name": tftypes.NewValue(tftypes.String, tftypes.UnknownValue),
+		"records":     tftypes.NewValue(tftypes.DynamicPseudoType, tftypes.UnknownValue),
+	})
+
+	hostname, err := hostnameFromConfig(context.Background(), tfsdk.Config{Schema: schemaResp.Schema, Raw: configValue})
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if hostname.ValueString() != "www.example.com" {
+		t.Fatalf("unexpected hostname: %q", hostname.ValueString())
+	}
+}

internal/provider/data_source_dns_records.go

@@ -100,7 +100,7 @@ func (d *dnsRecordsDataSource) Configure(_ context.Context, req datasource.Confi
 }
 
 func (d *dnsRecordsDataSource) Read(ctx context.Context, req datasource.ReadRequest, resp *datasource.ReadResponse) {
-	hostname, err := hostnameFromConfig(req.Config)
+	hostname, err := hostnameFromConfig(ctx, req.Config)
 	if err != nil {
 		resp.Diagnostics.AddError("Unable to parse data source configuration", err.Error())
 		return

internal/provider/data_source_domain.go

@@ -73,7 +73,7 @@ func (d *domainDataSource) Configure(_ context.Context, req datasource.Configure
 }
 
 func (d *domainDataSource) Read(ctx context.Context, req datasource.ReadRequest, resp *datasource.ReadResponse) {
-	hostname, err := hostnameFromConfig(req.Config)
+	hostname, err := hostnameFromConfig(ctx, req.Config)
 	if err != nil {
 		resp.Diagnostics.AddError("Unable to parse data source configuration", err.Error())
 		return