FEATURE: make nicer URL uniqueness check

database/migrations/2016_10_25_174000_add_unique_key_to_deleted_at_in_contents.php

@@ -0,0 +1,33 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+
+class AddUniqueKeyToDeletedAtInContents extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::table('contents', function (Blueprint $table) {
+            $table->dropUnique(['language', 'url']);
+            $table->unique(['language', 'url', 'deleted_at']);
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::table('contents', function (Blueprint $table) {
+            $table->dropUnique(['language', 'url', 'deleted_at']);
+            $table->unique(['language', 'url']);
+        });
+    }
+}