diff --git a/front/app/src/common/crud/types/foreignkey.type.ts b/front/app/src/common/crud/types/foreignkey.type.ts
index 1cafe5d7..3d2bad17 100644
--- a/front/app/src/common/crud/types/foreignkey.type.ts
+++ b/front/app/src/common/crud/types/foreignkey.type.ts
@@ -79,7 +79,7 @@ export class ForeignkeyTypeComponent extends FieldType<FieldTypeConfig> implemen
     public foreignLabel: string = ""
     public foreignResource : string = "";
     public foreignSchema : string = "";
-    public displayedFields = [];
+    public displayedFields: string[] = [];
     public errorMsg: string = "";
 
     constructor(private crudService: CrudService,
@@ -90,19 +90,15 @@ export class ForeignkeyTypeComponent extends FieldType<FieldTypeConfig> implemen
         super();
     }
 
-    typeaheadLoading: boolean = false;
-    dataSource: Observable<any> = new Observable();
-
     formatter = (foreignModel: any) => foreignModel.label;
 
 
     ngOnInit() {
         // @ts-ignore
-        this.foreignResource = this.field.foreignKey.reference.resource;
-        // @ts-ignore
-        this.foreignSchema = this.field.foreignKey.reference.schema;
-        // @ts-ignore
-        this.displayedFields = this.field.foreignKey.reference.displayedFields;
+        const reference: {resource: string, schema: string, displayedFields: string[] } = this.field.foreignKey.reference;
+        this.foreignResource = reference.resource;
+        this.foreignSchema = reference.schema;
+        this.displayedFields = reference.displayedFields;
 
 
         this.formControl.valueChanges.pipe(
@@ -196,14 +192,14 @@ export class ForeignkeyTypeComponent extends FieldType<FieldTypeConfig> implemen
         {
             for (let i in form.fieldGroup) {
                 // @ts-ignore
-                let f = form["fieldGroup"]![i]
-                // @ts-ignore
+                let f = form["fieldGroup"][i]
                 if (this.displayedFields.indexOf(f.key) == -1) {
                     // @ts-ignore
-                    delete form["fieldGroup"]![i]
+                    delete form["fieldGroup"][i]
                 } else {
-                    // @ts-ignore
-                    form["fieldGroup"]![i].props.disabled = true
+                    f.props.disabled = true;
+                    f.props.readonly = true;
+                    f.props.hideRequiredMarker = true;
                 }
             }
             delete form.props