Implement field option to set as nullable for create input type

Fixes #78

Author: erikgaal

src/Fields/Field.php

@@ -46,6 +46,13 @@ class Field
      */
     protected $nullable = false;
 
+    /**
+     * Indicates if the field can be omitted on create.
+     *
+     * @var bool
+     */
+    protected $nullableOnCreate = false;
+
     /**
      * @var bool
      */
@@ -276,6 +283,29 @@ public function isNullable(): bool
         return $this->nullable;
     }
 
+    /**
+     * Set if the field can be omitted on create.
+     *
+     * @param bool $nullable
+     * @return \Bakery\Fields\Field
+     */
+    public function nullableOnCreate(bool $nullable = true): self
+    {
+        $this->nullableOnCreate = $nullable;
+
+        return $this;
+    }
+
+    /**
+     * Determine if the field can be omitted on create.
+     *
+     * @return bool
+     */
+    public function isNullableOnCreate()
+    {
+        return $this->nullableOnCreate;
+    }
+
     /**
      * Set if the field has nullable items.
      *

src/Types/CreateInputType.php

@@ -49,8 +49,8 @@ protected function getFillableFields(): Collection
         $fields = parent::getFillableFields();
         $defaults = $this->model->getAttributes();
 
-        return $fields->map(function (Field $field, $key) use ($defaults) {
-            if (in_array($key, array_keys($defaults))) {
+        return $fields->map(function (Field $field) use ($defaults) {
+            if ($field->isNullableOnCreate()) {
                 return $field->nullable();
             }
 

tests/Stubs/Schemas/UserSchema.php

@@ -16,7 +16,7 @@ public function fields(): array
         return [
             'name' => Field::string()->searchable(),
             'email' => Field::string()->unique()->searchable(),
-            'type' => Field::string()->canStoreWhen('setType'),
+            'type' => Field::string()->nullableOnCreate()->canStoreWhen('setType'),
             'password' => Field::string()->canSeeWhen('readPassword'),
             'secret_information' => Field::string()
                 ->canSee(function (?Authenticatable $user, User $source) {