my changes

database/migrations/test/2018_02_19_120518_create_categories_table.php

@@ -0,0 +1,32 @@
+<?php
+
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Database\Migrations\Migration;
+
+class CreateCategoriesTable extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::create('categories', function (Blueprint $table) {            
+            $table->increments('id');
+			$table->string('category');
+            $table->timestamps();
+            
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::drop('categories');
+    }
+}

database/migrations/test/2018_02_20_134555_create_books_table.php

@@ -0,0 +1,39 @@
+<?php
+
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Database\Migrations\Migration;
+
+class CreateBooksTable extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::create('books', function (Blueprint $table) {    
+            $table->increments('id');
+			$table->string('title');
+			$table->string('author');
+			$table->integer('year');
+			$table->integer('stock');
+			$table->integer('category_id')->unsigned();
+			$table->foreign('category_id')->references('id')->on('categories');
+			//$table->integer('shelf_id')->unsigned();	
+			//$table->foreign('shelf_id');//->references('id')->on('shelves');		
+			$table->integer('year_id')->default('0');
+            $table->timestamps();            
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::drop('books');
+    }
+}

database/migrations/test/2018_02_20_135411_create_documents_table.php

@@ -0,0 +1,33 @@
+<?php
+
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Database\Migrations\Migration;
+
+class CreateDocumentsTable extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {      
+        Schema::create('documents', function (Blueprint $table) {
+            $table->increments('id');
+            $table->string('type', 100);
+            $table->string('publication_state', 100)->default('draft');;
+            $table->boolean('belongs_to_bibliography')->default('0');
+            $table->timestamps();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::drop('documents');
+    }
+}