- demo Schleife im Header

- Sprachen nur englisch und deutsch
- Migrations und TableSeeder ausgebessert (zusätzlich document_identifiers)
- reviewer nun reviewer Rolle (Fehler ausgebessert)

database/migrations/2019_09_02_105025_create_document_references_table.php

@@ -23,7 +23,7 @@ class CreateDocumentReferencesTable extends Migration
           
             $table->enum(
                 'type',
-                ["DOI", "Handle", "ISBN", "ISSN",  "URL", "URN"]
+                ["doi", "handle", "isbn", "issn",  "url", "urn"]
             );
             $table->enum(
                 'relation',

database/migrations/2019_09_13_150519_create_document_identifiers_table.php

@@ -0,0 +1,42 @@
+<?php
+
+use Illuminate\Support\Facades\Schema;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Database\Migrations\Migration;
+
+class CreateDocumentIdentifiersTable extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::create('document_identifiers', function (Blueprint $table) {
+            $table->increments('id');
+
+            $table->integer('document_id')->unsigned();
+            $table->foreign('document_id')->references('id')->on('documents')
+            ->onUpdate('cascade')->onDelete('cascade');
+          
+            $table->enum(
+                'type',
+                ["doi", "handle", "isbn", "issn",  "url", "urn"]
+            );
+           
+            $table->string('value', 255);
+            $table->timestamps();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::dropIfExists('document_identifiers');
+    }
+}