Fix error in warnings modal for invalid relation fields

Author: tkleinke

desktop/src/app/components/navbar/warnings/warnings-modal.component.ts

@@ -1,6 +1,6 @@
 import { Component } from '@angular/core';
 import { NgbActiveModal } from '@ng-bootstrap/ng-bootstrap';
-import { Map, flatten, intersect, isArray, nop, set } from 'tsfun';
+import { Map, flatten, intersect, isArray, isString, nop, set } from 'tsfun';
 import { CategoryForm, ConfigurationDocument, Datastore, Document, FieldDocument, IndexFacade, Labels,
     ProjectConfiguration, WarningType, ConfigReader, Group, Resource, Field, Tree, InvalidDataUtil, OutlierWarnings,
     RelationTargetWarnings } from 'idai-field-core';
@@ -594,6 +594,8 @@ export class WarningsModalComponent {
                 document.resource.relations[fieldName],
                 document.warnings.invalidRelationTargets.targetIds
             ) : document.resource.relations[fieldName];
+        
+        if (!isArray(targetIds) || !targetIds.every(targetId => isString(targetId))) return undefined;
 
         return this.datastore.getMultiple(targetIds);
     }

desktop/src/app/components/navbar/warnings/warnings-modal.html

@@ -185,12 +185,12 @@
                     <div *ngIf="section.type === 'unconfiguredFields' || section.type === 'invalidFields' || section.type === 'missingIdentifierPrefix'"
                          class="data-info">
                         <div><b i18n="@@navbar.taskbar.warnings.enteredData">Eingetragene Daten:</b></div>
-                        <div *ngIf="section.dataLabel && !section.isRelationField" class="data-info-content" [innerHTML]="section.dataLabel"></div>
-                        <div *ngIf="section.isRelationField" class="data-info-content">
+                        <div *ngIf="section.dataLabel && !section.relationTargets" class="data-info-content" [innerHTML]="section.dataLabel"></div>
+                        <div *ngIf="section.relationTargets" class="data-info-content">
                             <document-teaser *ngFor="let targetDocument of section.relationTargets"
                                              [document]="targetDocument"></document-teaser>
                         </div>
-                        <div *ngIf="!section.dataLabel && !section.isRelationField" class="data-info-content"
+                        <div *ngIf="!section.dataLabel && !section.relationTargets" class="data-info-content"
                              i18n="@@navbar.taskbar.warnings.fieldData.none"><i>Keine</i></div>
                     </div>
                     <div *ngIf="section.type === 'unconfiguredCategory'" class="data-info">