Preserve legacy dynamic intent during DNS record read

internal/provider/resource_dns_record.go

@@ -190,10 +190,7 @@ func (r *dnsRecordResource) Read(ctx context.Context, req resource.ReadRequest,
 		return
 	}
 
-	dynamicIntent := false
-	if !state.Dynamic.IsNull() && !state.Dynamic.IsUnknown() {
-		dynamicIntent = state.Dynamic.ValueBool()
-	}
+	dynamicIntent := inferDynamicIntentFromState(state.RecordType, state.Content, state.Dynamic)
 	nextState := mapDNSRecordToState(*record, dynamicIntent)
 	nextState.ID = state.ID
 	resp.Diagnostics.Append(resp.State.Set(ctx, &nextState)...)
@@ -485,6 +482,19 @@ func resolveDynamicIntent(recordType string, content types.String, dynamic types
 	return true, true
 }
 
+func inferDynamicIntentFromState(recordType types.String, content types.String, dynamic types.Bool) bool {
+	if !dynamic.IsNull() && !dynamic.IsUnknown() {
+		return dynamic.ValueBool()
+	}
+
+	normalizedType := strings.ToUpper(strings.TrimSpace(recordType.ValueString()))
+	if normalizedType != "A" && normalizedType != "AAAA" {
+		return false
+	}
+
+	return content.IsNull() || (content.IsUnknown())
+}
+
 func normalizeRecordContentForState(recordType string, content string, dynamicIntent bool) types.String {
 	if dynamicIntent {
 		return types.StringNull()

internal/provider/resource_dns_record_test.go

@@ -90,3 +90,50 @@ func TestNormalizeRecordContentForState(t *testing.T) {
 		t.Fatalf("expected dynamic content to remain null, got %q", got.ValueString())
 	}
 }
+
+func TestInferDynamicIntentFromState(t *testing.T) {
+	tests := []struct {
+		name       string
+		recordType types.String
+		content    types.String
+		dynamic    types.Bool
+		want       bool
+	}{
+		{
+			name:       "explicit dynamic false wins",
+			recordType: types.StringValue("A"),
+			content:    types.StringNull(),
+			dynamic:    types.BoolValue(false),
+			want:       false,
+		},
+		{
+			name:       "legacy A null content treated dynamic",
+			recordType: types.StringValue("A"),
+			content:    types.StringNull(),
+			dynamic:    types.BoolNull(),
+			want:       true,
+		},
+		{
+			name:       "legacy AAAA unknown content treated dynamic",
+			recordType: types.StringValue("AAAA"),
+			content:    types.StringUnknown(),
+			dynamic:    types.BoolNull(),
+			want:       true,
+		},
+		{
+			name:       "legacy non-A not dynamic",
+			recordType: types.StringValue("TXT"),
+			content:    types.StringNull(),
+			dynamic:    types.BoolNull(),
+			want:       false,
+		},
+	}
+
+	for _, tc := range tests {
+		t.Run(tc.name, func(t *testing.T) {
+			if got := inferDynamicIntentFromState(tc.recordType, tc.content, tc.dynamic); got != tc.want {
+				t.Fatalf("inferDynamicIntentFromState()=%v, want %v", got, tc.want)
+			}
+		})
+	}
+}