Better handle of empty strings.

frontend/app/framework/angular/forms/forms-helper.spec.ts

@@ -26,7 +26,7 @@ describe('FormHelpers', () => {
             expect(values).toEqual(['1', '2', '3']);
         });
 
-        it('should not trigger on disable', () => {
+        it('should also trigger on disable', () => {
             const form = new FormControl('1', Validators.required);
 
             const values: any[] = [];
@@ -39,6 +39,7 @@ describe('FormHelpers', () => {
             form.enable();
             form.setValue('3');
             form.disable();
+            form.setValue('4');
 
             expect(values).toEqual(['1', '2', '3']);
         });

frontend/app/framework/angular/forms/forms-helper.ts

@@ -7,7 +7,7 @@
 
 import { AbstractControl, FormArray, FormGroup } from '@angular/forms';
 import { Observable } from 'rxjs';
-import { distinctUntilChanged, filter, map, startWith } from 'rxjs/operators';
+import { distinctUntilChanged, map, startWith } from 'rxjs/operators';
 
 import { Types } from './../../utils/types';
 
@@ -30,7 +30,7 @@ export function invalid$(form: AbstractControl): Observable<boolean> {
 }
 
 export function value$<T = any>(form: AbstractControl): Observable<T> {
-    return form.valueChanges.pipe(startWith(form.value), filter(_ => form.enabled), distinctUntilChanged());
+    return form.valueChanges.pipe(startWith(form.value), distinctUntilChanged());
 }
 
 export function hasValue$(form: AbstractControl): Observable<boolean> {

frontend/app/framework/angular/forms/string-form-control.spec.ts

@@ -0,0 +1,26 @@
+/*
+ * Squidex Headless CMS
+ *
+ * @license
+ * Copyright (c) Squidex UG (haftungsbeschränkt). All rights reserved.
+ */
+
+import { StringFormControl } from './string-form-control';
+
+describe('StringFormControl', () => {
+    it('should convert empty string to undefined', () => {
+        const formControl = new StringFormControl();
+
+        formControl.setValue('');
+
+        expect(formControl.value).toBeUndefined();
+    });
+
+    it('should convert empty string to undefined when patching', () => {
+        const formControl = new StringFormControl();
+
+        formControl.patchValue('');
+
+        expect(formControl.value).toBeUndefined();
+    });
+});

frontend/app/framework/angular/forms/string-form-control.ts

@@ -0,0 +1,39 @@
+/*
+ * Squidex Headless CMS
+ *
+ * @license
+ * Copyright (c) Squidex UG (haftungsbeschränkt). All rights reserved.
+ */
+
+// tslint:disable: readonly-array
+
+import { AbstractControlOptions, AsyncValidatorFn, FormControl, ValidatorFn } from '@angular/forms';
+
+type ValueOptions = {
+    onlySelf?: boolean;
+    emitEvent?: boolean;
+    emitModelToViewChange?: boolean;
+    emitViewToModelChange?: boolean;
+};
+
+export class StringFormControl extends FormControl {
+    constructor(formState?: any, validatorOrOpts?: ValidatorFn | ValidatorFn[] | AbstractControlOptions | null, asyncValidator?: AsyncValidatorFn | AsyncValidatorFn[] | null) {
+        super(formState, validatorOrOpts, asyncValidator);
+    }
+
+    public setValue(value: any, options?: ValueOptions) {
+        if (value === '') {
+            value = undefined;
+        }
+
+        super.setValue(value, options);
+    }
+
+    public patchValue(value: any, options?: ValueOptions) {
+        if (value === '') {
+            value = undefined;
+        }
+
+        super.patchValue(value, options);
+    }
+}

frontend/app/framework/declarations.ts

@@ -29,6 +29,7 @@ export * from './angular/forms/form-hint.component';
 export * from './angular/forms/forms-helper';
 export * from './angular/forms/indeterminate-value.directive';
 export * from './angular/forms/progress-bar.component';
+export * from './angular/forms/string-form-control';
 export * from './angular/forms/transform-input.directive';
 export * from './angular/forms/validators';
 

frontend/app/framework/utils/pager.spec.ts

@@ -235,5 +235,7 @@ describe('Pager', () => {
         pager.saveTo('my', localStore.object);
 
         localStore.verify(x => x.setInt('my.pageSize', 25), Times.once());
+
+        expect().nothing();
     });
 });

frontend/app/framework/utils/types.spec.ts

@@ -173,6 +173,26 @@ describe('Types', () => {
         expect(Types.equals({ a: [1, 2] }, { a: [1, 2] })).toBeTruthy();
     });
 
+    const FalsyValues = [false, null, 0];
+
+    it('should compare empty string with undefined', () => {
+        expect(Types.equals('', undefined, true)).toBeTruthy();
+        expect(Types.equals('', undefined, false)).toBeFalsy();
+
+        expect(Types.equals(undefined, '', true)).toBeTruthy();
+        expect(Types.equals(undefined, '', false)).toBeFalsy();
+    });
+
+    FalsyValues.forEach(x => {
+        it(`should compare empty string with {x}`, () => {
+            expect(Types.equals('', x, true)).toBeFalsy();
+            expect(Types.equals('', x, false)).toBeFalsy();
+
+            expect(Types.equals(x, '', true)).toBeFalsy();
+            expect(Types.equals(x, '', false)).toBeFalsy();
+        });
+    });
+
     it('should clone array', () => {
         const source = [1, 2, 3];
         const result = Types.clone(source);

frontend/app/framework/utils/types.ts

@@ -126,11 +126,21 @@ export module Types {
         return lhs;
     }
 
-    export function equals(lhs: any, rhs: any) {
+    export function equals(lhs: any, rhs: any, lazyString = false) {
         if (lhs === rhs || (lhs !== lhs && rhs !== rhs)) {
             return true;
         }
 
+        if (lazyString) {
+            const result =
+                (lhs === '' && Types.isUndefined(rhs) ||
+                (rhs === '' && Types.isUndefined(lhs)));
+
+            if (result) {
+                return true;
+            }
+        }
+
         if (!lhs || !rhs) {
             return false;
         }
@@ -141,7 +151,7 @@ export module Types {
             }
 
             for (let i = 0; i < lhs.length; i++) {
-                if (!equals(lhs[i], rhs[i])) {
+                if (!equals(lhs[i], rhs[i], lazyString)) {
                     return false;
                 }
             }
@@ -154,7 +164,7 @@ export module Types {
 
             for (let key in lhs) {
                 if (lhs.hasOwnProperty(key)) {
-                    if (!equals(lhs[key], rhs[key])) {
+                    if (!equals(lhs[key], rhs[key], lazyString)) {
                         return false;
                     }
                 }

frontend/app/shared/components/forms/references-dropdown.component.ts

@@ -86,6 +86,7 @@ export class ReferencesDropdownComponent extends StatefulControlComponent<State,
         this.own(
             value$(this.selectionControl)
                 .subscribe((value: ContentName) => {
+                    if (this.selectionControl.enabled) {
                         if (value && value.id) {
                             this.callTouched();
 
@@ -103,6 +104,7 @@ export class ReferencesDropdownComponent extends StatefulControlComponent<State,
                                 this.callChange([]);
                             }
                         }
+                    }
                 }));
     }
 

frontend/app/shared/state/contents.forms.ts

@@ -7,13 +7,14 @@
 
 // tslint:disable:prefer-for-of
 
-import { FormArray, FormBuilder, FormControl, FormGroup, ValidatorFn, Validators } from '@angular/forms';
+import { FormArray, FormBuilder, FormGroup, ValidatorFn, Validators } from '@angular/forms';
 import { BehaviorSubject } from 'rxjs';
 
 import {
     DateTime,
     Form,
     formControls,
+    StringFormControl,
     Types,
     ValidatorsEx,
     value$
@@ -483,11 +484,12 @@ export class EditContentForm extends Form<FormGroup, any> {
                 for (const { key, isOptional } of this.partitions.getAll(field)) {
                     const fieldValidators = FieldsValidators.create(field, isOptional);
 
-                    if (field.isArray) {
-                        fieldForm.setControl(key, new FormArray([], fieldValidators));
-                    } else {
-                        fieldForm.setControl(key, new FormControl(fieldDefault, fieldValidators));
-                    }
+                    const control =
+                        field.isArray ?
+                            new FormArray([], fieldValidators) :
+                            new StringFormControl(fieldDefault, fieldValidators);
+
+                    fieldForm.setControl(key, control);
                 }
 
                 this.form.setControl(field.name, fieldForm);
@@ -501,13 +503,13 @@ export class EditContentForm extends Form<FormGroup, any> {
     public hasChanged() {
         const currentValue = this.form.getRawValue();
 
-        return !Types.equals(this.initialData, currentValue);
+        return !Types.equals(this.initialData, currentValue, true);
     }
 
     public hasChanges(changes: any) {
         const currentValue = this.form.getRawValue();
 
-        return !Types.equals(changes, currentValue);
+        return !Types.equals(changes, currentValue, true);
     }
 
     public arrayItemRemove(field: RootFieldDto, language: AppLanguageDto, index: number) {
@@ -546,7 +548,7 @@ export class EditContentForm extends Form<FormGroup, any> {
                 }
 
                 const nestedValidators = FieldsValidators.create(nestedField, partition.isOptional);
-                const nestedForm = new FormControl(value, nestedValidators);
+                const nestedForm = new StringFormControl(value, nestedValidators);
 
                 if (nestedField.isDisabled) {
                     nestedForm.disable(NO_EMIT);
@@ -673,7 +675,7 @@ export class PatchContentForm extends Form<FormGroup, any> {
         for (const field of this.editableFields) {
             const validators = FieldsValidators.create(field, this.language.isOptional);
 
-            this.form.setControl(field.name, new FormControl(undefined, validators));
+            this.form.setControl(field.name, new StringFormControl(undefined, validators));
         }
     }
 

frontend/app/shared/state/table-fields.spec.ts

@@ -20,7 +20,7 @@ import {
     UIState
 } from '@app/shared/internal';
 
-describe('TableFielsd', () => {
+describe('TableFields', () => {
     let uiState: IMock<UIState>;
 
     const schema =
@@ -82,6 +82,8 @@ describe('TableFielsd', () => {
             tableFields.updateFields(test.fields, true);
 
             uiState.verify(x => x.removeUser('schemas.my-schema.view'), Times.once());
+
+            expect().nothing();
         });
     });
 
@@ -119,5 +121,7 @@ describe('TableFielsd', () => {
         tableFields.updateFields(config, true);
 
         uiState.verify(x => x.set('schemas.my-schema.view', [MetaFields.version], true), Times.once());
+
+        expect().nothing();
     });
 });

frontend/package-lock.json

@@ -5,9 +5,9 @@
   "requires": true,
   "dependencies": {
     "@angular-devkit/build-optimizer": {
-      "version": "0.900.1",
-      "resolved": "https://registry.npmjs.org/@angular-devkit/build-optimizer/-/build-optimizer-0.900.1.tgz",
-      "integrity": "sha512-EnIU+ogiJrUPf8+fuPE5xQ+j/qUZDZ/SmLs8XAOmvoOBpZ0vPNedrHBHCxmV+ACbCxHGmIKQ/ZL29XUYVasteg==",
+      "version": "0.900.3",
+      "resolved": "https://registry.npmjs.org/@angular-devkit/build-optimizer/-/build-optimizer-0.900.3.tgz",
+      "integrity": "sha512-VLAWtAXpOzOoYUJrN6sT90UdIdvrVIipkzGz7nfI1kscDvxUFwVZnsNNHtFinaY2SfZAunHhYQOA/B9FJ8WPdQ==",
       "dev": true,
       "requires": {
         "loader-utils": "1.2.3",
@@ -76,9 +76,9 @@
       }
     },
     "@angular-devkit/core": {
-      "version": "9.0.1",
-      "resolved": "https://registry.npmjs.org/@angular-devkit/core/-/core-9.0.1.tgz",
-      "integrity": "sha512-HboJI/x+SJD9clSOAMjHRv0eXAGRAdEaqJGmjDfdFMP2wznfsBiC6cgcHC17oM4jRWFhmWMR8Omc7CjLZJawJg==",
+      "version": "9.0.3",
+      "resolved": "https://registry.npmjs.org/@angular-devkit/core/-/core-9.0.3.tgz",
+      "integrity": "sha512-3+abmv9K9d+BVgUAolYgoOqlGAA2Jb1pWo2biapSDG6KjUZHUCJdnsKigLtLorCdv0SrjTp56FFplkcqKsFQgA==",
       "dev": true,
       "requires": {
         "ajv": "6.10.2",
@@ -148,33 +148,33 @@
       }
     },
     "@angular/animations": {
-      "version": "9.0.0",
-      "resolved": "https://registry.npmjs.org/@angular/animations/-/animations-9.0.0.tgz",
-      "integrity": "sha512-jB8+SC3vMztW5zt5UYVmtVwqIWE33UyEjbP5JPba3I3bLRK5E059LcJmN1rSdJHItgIAdG9Y1I0WJ6aiSFyp4Q=="
+      "version": "9.0.2",
+      "resolved": "https://registry.npmjs.org/@angular/animations/-/animations-9.0.2.tgz",
+      "integrity": "sha512-vj4N8nSLytQI45TtGy2tJb0Yc7uqlyap+qhghc+jdyG41w18KQUnIneEWKOfHWnp8VJEfzgzaY7zr/1QPlxWgA=="
     },
     "@angular/cdk": {
-      "version": "9.0.0",
-      "resolved": "https://registry.npmjs.org/@angular/cdk/-/cdk-9.0.0.tgz",
-      "integrity": "sha512-2kYpyYbewIB6fubSIDMvSprJLNplRZoL/AtXW3od4dLyRxtzX+7iWTAtzUG/dhq8CKev0lpd1HENh5lLR/Lhjw==",
+      "version": "9.0.1",
+      "resolved": "https://registry.npmjs.org/@angular/cdk/-/cdk-9.0.1.tgz",
+      "integrity": "sha512-slhYG9lOX7JoxcULdfIvXspkDRjYTBG8PH6B2Slxi8CpV42x0t+yQnBQxp/U3ud1m1BWVrlxwKZywaPFe1tSeA==",
       "requires": {
         "parse5": "^5.0.0"
       }
     },
     "@angular/common": {
-      "version": "9.0.0",
-      "resolved": "https://registry.npmjs.org/@angular/common/-/common-9.0.0.tgz",
-      "integrity": "sha512-ZMmEClGtUNJwV5CBlqcSHPIsNyz6WU/GvKWFzJ5VZc68oeg1e7lqfNMNIC47TjyolNJ7VSpNlyrKjzfdBlmqVw=="
+      "version": "9.0.2",
+      "resolved": "https://registry.npmjs.org/@angular/common/-/common-9.0.2.tgz",
+      "integrity": "sha512-KYOov8fg5WX/bAMkemlcAZxqiq/6ga1BoxjaiZXBj07KDq8i5Nwcm6RmNkeDByCuXd2UHVm1w5t897wEUi6fnw=="
     },
     "@angular/compiler": {
-      "version": "9.0.0",
-      "resolved": "https://registry.npmjs.org/@angular/compiler/-/compiler-9.0.0.tgz",
-      "integrity": "sha512-ctjwuntPfZZT2mNj2NDIVu51t9cvbhl/16epc5xEwyzyDt76pX9UgwvY+MbXrf/C/FWwdtmNtfP698BKI+9leQ==",
+      "version": "9.0.2",
+      "resolved": "https://registry.npmjs.org/@angular/compiler/-/compiler-9.0.2.tgz",
+      "integrity": "sha512-IWlKn5v3y7k1Z2K2wfNNzbn9xgA4fFlWyPe9QpdS8iy6/bPe5GfKhHbMYIza5eIhPXDN93zdEptiAIXGP3kLBQ==",
       "dev": true
     },
     "@angular/compiler-cli": {
-      "version": "9.0.0",
-      "resolved": "https://registry.npmjs.org/@angular/compiler-cli/-/compiler-cli-9.0.0.tgz",
-      "integrity": "sha512-6L3swd3Z2ceAapmioml6z7yu3bYC2aVm3/rgK7eCoZtPcevuvTpGnXcFSVvNgByV51GntgInThPbMx0xY23Rvw==",
+      "version": "9.0.2",
+      "resolved": "https://registry.npmjs.org/@angular/compiler-cli/-/compiler-cli-9.0.2.tgz",
+      "integrity": "sha512-2AAZr1jX72OG9k1viVShiDGAwV9PZEcoDt80PXkUjLTUwWxicuSBKYauph47PzK/qzqWhdbvMbh8wCWHSLq0Qg==",
       "dev": true,
       "requires": {
         "canonical-path": "1.0.0",
@@ -199,38 +199,38 @@
       }
     },
     "@angular/core": {
-      "version": "9.0.0",
-      "resolved": "https://registry.npmjs.org/@angular/core/-/core-9.0.0.tgz",
-      "integrity": "sha512-6Pxgsrf0qF9iFFqmIcWmjJGkkCaCm6V5QNnxMy2KloO3SDq6QuMVRbN9RtC8Urmo25LP+eZ6ZgYqFYpdD8Hd9w=="
+      "version": "9.0.2",
+      "resolved": "https://registry.npmjs.org/@angular/core/-/core-9.0.2.tgz",
+      "integrity": "sha512-ccVPR6RZo2s9O9phO0TJ60QZ0WA7qfUMzo0xnpBW0XGcbTzLEn9upvs+0PX64f9UpnHz/MQo0wsqYvTLuoz7Yw=="
     },
     "@angular/forms": {
-      "version": "9.0.0",
-      "resolved": "https://registry.npmjs.org/@angular/forms/-/forms-9.0.0.tgz",
-      "integrity": "sha512-SIYJc0Rgaihow1t+iiwSFGEvvRgssgUuxwIYbMfCp1Sx513K+JX9nVFXqU+dcGj/eF1u5wwYwbvlVyuMQLzmXg=="
+      "version": "9.0.2",
+      "resolved": "https://registry.npmjs.org/@angular/forms/-/forms-9.0.2.tgz",
+      "integrity": "sha512-qXEth7yeCd+5i6QyvllXnh/Rkzh16raFX5nfI7mgKHjWMik15Ua8wkVhDX9b5gizWeEyZtZcMGsTbbOQy0Ft3Q=="
     },
     "@angular/platform-browser": {
-      "version": "9.0.0",
-      "resolved": "https://registry.npmjs.org/@angular/platform-browser/-/platform-browser-9.0.0.tgz",
-      "integrity": "sha512-2PR/o57HjZvKEnAF8ODeqxmeC90oth9dLTMrJNoI5MET0IeErKeI/9Sl5cLQuXC+lSVN5rOMCvDb74VWSno5yw=="
+      "version": "9.0.2",
+      "resolved": "https://registry.npmjs.org/@angular/platform-browser/-/platform-browser-9.0.2.tgz",
+      "integrity": "sha512-RMivdtJtspYLH/96AzLwLj3v0O9ck0sL6R1uh5JacfBkmedqJzmLn+AOxTdjaGdIpFtw9tisT+0Aw/nkG14vlA=="
     },
     "@angular/platform-browser-dynamic": {
-      "version": "9.0.0",
-      "resolved": "https://registry.npmjs.org/@angular/platform-browser-dynamic/-/platform-browser-dynamic-9.0.0.tgz",
-      "integrity": "sha512-F1kbEpmDottTemRPEOAz2Te5ABVJ7wypfzBllxqXbdxPHvYLfL8db2dXyiGqABQ3ZFHPLNilrkUTy0sbuuU4OA=="
+      "version": "9.0.2",
+      "resolved": "https://registry.npmjs.org/@angular/platform-browser-dynamic/-/platform-browser-dynamic-9.0.2.tgz",
+      "integrity": "sha512-RJa+Y83hIFcf7pFcbbaCi7M5Y9nUUcQVuazWbQtiUe+BY5pikyug4RsF2B10pctcxb6LFLElfmkvatmmwEQ9aQ=="
     },
     "@angular/platform-server": {
-      "version": "9.0.0",
-      "resolved": "https://registry.npmjs.org/@angular/platform-server/-/platform-server-9.0.0.tgz",
-      "integrity": "sha512-wIHZdv7WCtuZ6pgj1n/H2V7KbUxUBfrb1PJzVnCWzpMQDIf+jrMxLlB2irpYb/HHh4tOem6dHX5JV45A2sJ5/w==",
+      "version": "9.0.2",
+      "resolved": "https://registry.npmjs.org/@angular/platform-server/-/platform-server-9.0.2.tgz",
+      "integrity": "sha512-GXpEKMACf648vEGt5n/5XXHWd5Tf5D/x4sjbPCasgZ4uIrtSy3SDrJrQl8rxvFQkv804eBnC5CH9ckEFj8g9QQ==",
       "requires": {
         "domino": "^2.1.2",
         "xhr2": "^0.1.4"
       }
     },
     "@angular/router": {
-      "version": "9.0.0",
-      "resolved": "https://registry.npmjs.org/@angular/router/-/router-9.0.0.tgz",
-      "integrity": "sha512-yyOcStpgN5t8wGRNO85mo0jplXkntP+v2tmSxNx45pahqmofSFm+QCEFa2zHQuMr7NoiGERhd0Tae7NDCCjtjA=="
+      "version": "9.0.2",
+      "resolved": "https://registry.npmjs.org/@angular/router/-/router-9.0.2.tgz",
+      "integrity": "sha512-jDKq9K0pOgaMtocg7VCfIQX8jTyBSb+0hjOcj6kXQVCcmnxeBzGPRX2THQyFkyzG8owTBZlHIrJA3H2thDU2LQ=="
     },
     "@babel/code-frame": {
       "version": "7.8.3",
@@ -408,12 +408,12 @@
       "dev": true
     },
     "@ngtools/webpack": {
-      "version": "9.0.1",
-      "resolved": "https://registry.npmjs.org/@ngtools/webpack/-/webpack-9.0.1.tgz",
-      "integrity": "sha512-SG1MDVSC7pIuaX1QYTh94k/YJa6w2OR2RNbghkDXToDzDv6bKnTQYoJPyXk+gwfDTVD4V5z2dKSNbxFzWleFpg==",
+      "version": "9.0.3",
+      "resolved": "https://registry.npmjs.org/@ngtools/webpack/-/webpack-9.0.3.tgz",
+      "integrity": "sha512-pMIXfq1IJLbvwmkPonGs7nrpuBCXrlZTf9A4OYsMBZcfU8JMn0pRdx7G2+bC9Q/f+uSw2uvPSv76xJXLBOntmA==",
       "dev": true,
       "requires": {
-        "@angular-devkit/core": "9.0.1",
+        "@angular-devkit/core": "9.0.3",
         "enhanced-resolve": "4.1.1",
         "rxjs": "6.5.3",
         "webpack-sources": "1.4.3"
@@ -462,9 +462,9 @@
       }
     },
     "@types/core-js": {
-      "version": "2.5.2",
-      "resolved": "https://registry.npmjs.org/@types/core-js/-/core-js-2.5.2.tgz",
-      "integrity": "sha512-+NPqjXgyA02xTHKJDeDca9u8Zr42ts6jhdND4C3PrPeQ35RJa0dmfAedXW7a9K4N1QcBbuWI1nSfGK4r1eVFCQ==",
+      "version": "2.5.3",
+      "resolved": "https://registry.npmjs.org/@types/core-js/-/core-js-2.5.3.tgz",
+      "integrity": "sha512-F9RHpjuPSit4dCCRXgi7XcqA01DAjy9QY+v9yICoxXsjXD9cgQpyZyL2eSZnTkBGXGaQnea8waZOZTogLDB+rA==",
       "dev": true
     },
     "@types/events": {
@@ -485,9 +485,9 @@
       }
     },
     "@types/jasmine": {
-      "version": "3.5.3",
-      "resolved": "https://registry.npmjs.org/@types/jasmine/-/jasmine-3.5.3.tgz",
-      "integrity": "sha512-LRJ21f/BO4QNZ3YDaMP0OEurOfE77x8mi8MfEnUsei5IKfmZL0GKl7juhABMdUIJHhVS9OCLotKHfsFNAuJ+DA==",
+      "version": "3.5.5",
+      "resolved": "https://registry.npmjs.org/@types/jasmine/-/jasmine-3.5.5.tgz",
+      "integrity": "sha512-LlhwGivHkUV8ehNmaXjGGXopLm91G9ORIRcjw7Ya47jVAIGudewFZM2PdPXBvueZfRWwYzLt083wiPfKRXrSlg==",
       "dev": true
     },
     "@types/json5": {
@@ -521,9 +521,9 @@
       "dev": true
     },
     "@types/node": {
-      "version": "13.7.0",
-      "resolved": "https://registry.npmjs.org/@types/node/-/node-13.7.0.tgz",
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frontend/package.json

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 }