From 115b4ef16e52e71db35f4dc730e7490ede4b618e Mon Sep 17 00:00:00 2001
From: Greta <staskewitsch@infai.org>
Date: Mon, 2 Dec 2024 15:03:40 +0000
Subject: [PATCH] SNRGY-3650 fix ngControl error in chart widget edit dialog

---
 src/app/core/directives/matError.directive.ts             | 8 +++++++-
 .../dialog/charts-export-edit-dialog.component.html       | 1 -
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/app/core/directives/matError.directive.ts b/src/app/core/directives/matError.directive.ts
index 57e38adc..aad79615 100644
--- a/src/app/core/directives/matError.directive.ts
+++ b/src/app/core/directives/matError.directive.ts
@@ -51,7 +51,13 @@ export class MatErrorMessagesDirective implements AfterViewInit, OnDestroy {
         const container = this._inj.get(MatFormField);
         this.inputRef = container._control;
         if (this.formControl == null) {
-            this.formControl = this.inputRef.ngControl.control;
+            try {
+                this.formControl = this.inputRef.ngControl.control;
+            } catch (e) {
+                throw new Error('FormControl must be provided to mat-error with label: ' + this.label + '\n This ' +
+                    'can be done by using formControlName, formControl, or ngModel in the relevant mat-form-field. ' +
+                    'If there is no FormControl needed for the mat-form-field, then the mat-error is redundant, too.');
+            }
         }
 
         //console.log(this.label, ' inputRef: ', this.inputRef);
diff --git a/src/app/widgets/charts/export/dialog/charts-export-edit-dialog.component.html b/src/app/widgets/charts/export/dialog/charts-export-edit-dialog.component.html
index a1967814..022ed8f2 100644
--- a/src/app/widgets/charts/export/dialog/charts-export-edit-dialog.component.html
+++ b/src/app/widgets/charts/export/dialog/charts-export-edit-dialog.component.html
@@ -75,7 +75,6 @@ <h2>Configure Chart</h2>
                         <mat-form-field color="accent" appearance="outline" class="full-width">
                             <mat-label>X-Axis</mat-label>
                             <input type="text" matInput value="time" disabled>
-                            <mat-error senergyError label="X-Axis"></mat-error>
                         </mat-form-field>
                     </td>
                     <td>