Fix: Workable design of date-picker

coscine/issues#1216

src/components/InputCombobox.vue

@@ -62,27 +62,30 @@ export default Vue.extend({
     }
   },
   mounted() {
-    MetadataApi.getClassInstances(
-      this.projectId,
-      this.class,
-      (response: any) => {
-        if (
-          Array.isArray(response.data[this.languageCode]) &&
-          response.data[this.languageCode].length === 0
-        ) {
+    if ((typeof coscine !== "undefined") && (typeof (coscine as any).authorization !== "undefined") && (typeof (coscine as any).authorization.bearer !== "undefined")) {    
+      MetadataApi.getClassInstances(
+        this.projectId,
+        this.class,
+        (response: any) => {
           if (
-            Array.isArray(response.data.en) &&
-            response.data.en.length !== 0
+            Array.isArray(response.data[this.languageCode]) &&
+            response.data[this.languageCode].length === 0
           ) {
-            this.selectableOptions = response.data.en;
+            if (
+              Array.isArray(response.data.en) &&
+              response.data.en.length !== 0
+            ) {
+              this.selectableOptions = response.data.en;
+            } else {
+              this.selectableOptions = response.data.de;
+            }
           } else {
-            this.selectableOptions = response.data.de;
+            this.selectableOptions = response.data[this.languageCode];
           }
-        } else {
-          this.selectableOptions = response.data[this.languageCode];
+          this.loadData();
         }
-        this.loadData();
-      });
+      );
+    }
     if (this.fixedValueMode) {
       this.updateFixedValues();
     }