Merge pull request #32 from netglade/fix/glade-input-asser

Fix gladeinput assert

glade_forms/CHANGELOG.md

@@ -1,3 +1,6 @@
+## 1.3.1
+- **[Fix]**: Fixed `GladeInput.create` assert to allow null for `value` and `initialValue` when input's type is nullable.
+
 ## 1.3.0
 - **[Fix]**: When using `GladeInput.create`, passing only `value` ended up in UI vs model not being synced. Now that's fixed.
 - **[Breaking]**: StringInput only works with `String` now.

glade_forms/lib/src/core/glade_input.dart

@@ -201,7 +201,7 @@ class GladeInput<T> extends ChangeNotifier {
     ValueTransform<T>? valueTransform,
     DefaultTranslations? defaultTranslations,
   }) {
-    assert(value != null || initialValue != null, 'At least one of value or initialValue must be set');
+    assert(value != null || initialValue != null || TypeHelper.typeIsNullable<T>(), 'If type is not nullable, at least one of value or initialValue must be set');
 
     final validatorInstance = validator?.call(GladeValidator<T>()) ?? GladeValidator<T>().build();
 

glade_forms/lib/src/core/type_helper.dart

@@ -1,5 +1,7 @@
 class TypeHelper {
   static bool typesEqual<T1, T2>() => T1 == T2;
 
+  static bool typeIsNullable<T>() => null is T;
+
   static bool typeIsStringOrNullabeString<T>() => typesEqual<T, String>() || typesEqual<T, String?>();
 }

glade_forms/pubspec.yaml

@@ -1,6 +1,6 @@
 name: glade_forms
 description: A universal way to define form validators with support of translations.
-version: 1.3.0
+version: 1.3.1
 repository: https://github.com/netglade/glade_forms
 issue_tracker: https://github.com/netglade/glade_forms/issues
 screenshots: