AAE-28918 Fix for start process button is enabled when required widgets are read only without value (#11781)

* AAE-28918 Fix start process button is enabled when required widgets are read only without value

* Apply Copilot review suggestions.

* updates after code review comments

* revert change made earlier

lib/core/src/lib/form/components/widgets/core/form-field.model.spec.ts

@@ -1220,7 +1220,7 @@ describe('FormFieldModel', () => {
         });
     });
 
-    it('should validate readOnly field if it is validatable', () => {
+    it('should fail validation for readOnly required display-external-property field with null value', () => {
         const form = new FormModel();
         const field = new FormFieldModel(form, {
             id: 'mockDisplayExternalPropertyFieldId',
@@ -1233,11 +1233,10 @@ describe('FormFieldModel', () => {
         const validator = new RequiredFieldValidator();
         form.fieldValidators = [validator];
 
-        expect(FormFieldTypes.isValidatableType(FormFieldTypes.DISPLAY_EXTERNAL_PROPERTY)).toBeTrue();
         expect(field.validate()).toBe(false);
     });
 
-    it('should validate NOT readOnly field if it is validatable', () => {
+    it('should fail validation for required display-external-property field with null value', () => {
         const form = new FormModel();
         const field = new FormFieldModel(form, {
             id: 'mockDisplayExternalPropertyFieldId',
@@ -1250,11 +1249,10 @@ describe('FormFieldModel', () => {
         const validator = new RequiredFieldValidator();
         form.fieldValidators = [validator];
 
-        expect(FormFieldTypes.isValidatableType(FormFieldTypes.DISPLAY_EXTERNAL_PROPERTY)).toBeTrue();
         expect(field.validate()).toBe(false);
     });
 
-    it('should NOT validate readOnly field if it is NOT validatable', () => {
+    it('should fail validation for readOnly required text field with null value', () => {
         const form = new FormModel();
         const field = new FormFieldModel(form, {
             id: 'mockTextFieldId',
@@ -1267,10 +1265,60 @@ describe('FormFieldModel', () => {
         const validator = new RequiredFieldValidator();
         form.fieldValidators = [validator];
 
-        expect(FormFieldTypes.isValidatableType(FormFieldTypes.TEXT)).toBeFalse();
+        expect(field.validate()).toBe(false);
+    });
+
+    it('should pass validation for readOnly required field that has a value', () => {
+        const form = new FormModel();
+        const field = new FormFieldModel(form, {
+            id: 'mockTextFieldId',
+            type: FormFieldTypes.TEXT,
+            readOnly: true,
+            required: true,
+            value: 'some value'
+        });
+
+        const validator = new RequiredFieldValidator();
+        form.fieldValidators = [validator];
+
         expect(field.validate()).toBe(true);
     });
 
+    it('should pass validation for readOnly non-required field with null value', () => {
+        const form = new FormModel();
+        const field = new FormFieldModel(form, {
+            id: 'mockTextFieldId',
+            type: FormFieldTypes.TEXT,
+            readOnly: true,
+            required: false,
+            value: null
+        });
+
+        const validator = new RequiredFieldValidator();
+        form.fieldValidators = [validator];
+
+        expect(field.validate()).toBe(true);
+    });
+
+    it('should pass validation for readOnly required field with empty value when field or parent is hidden', () => {
+        const form = new FormModel();
+        const field = new FormFieldModel(form, {
+            id: 'mockTextFieldId',
+            type: FormFieldTypes.TEXT,
+            readOnly: true,
+            required: true,
+            value: null
+        });
+
+        const validator = new RequiredFieldValidator();
+        form.fieldValidators = [validator];
+
+        spyOn(form, 'isFieldOrParentHidden').and.returnValue(true);
+
+        expect(field.validate()).toBe(true);
+        expect(form.isFieldOrParentHidden).toHaveBeenCalledWith(field);
+    });
+
     it('should set the tooltip correctly', () => {
         const form = new FormModel();
         const tooltipText = 'This is a tooltip';

lib/core/src/lib/form/components/widgets/core/form-field.model.ts

@@ -170,23 +170,18 @@ export class FormFieldModel extends FormWidgetModel {
     validate(): boolean {
         this.validationSummary = new ErrorMessageModel();
 
-        if (this.isFieldValidatable()) {
-            const validators = this.form.fieldValidators || [];
-            for (const validator of validators) {
-                if (!validator.validate(this)) {
-                    this._isValid = false;
-                    return this._isValid;
-                }
+        const validators = this.form?.fieldValidators || [];
+        for (const validator of validators) {
+            if (!validator.validate(this)) {
+                this._isValid = false;
+                return this._isValid;
             }
         }
+
         this._isValid = true;
         return this._isValid;
     }
 
-    private isFieldValidatable(): boolean {
-        return !this.readOnly || FormFieldTypes.isValidatableType(this.type);
-    }
-
     constructor(form: any, json?: any, parent?: RepeatableSectionModel) {
         super(form, json);
         if (json) {