first commit

database/migrations/2017_12_10_011346_create_locations_table.php

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+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+class CreateLocationsTable extends Migration {
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up() {
+        Schema::create('locations', function(Blueprint $table) {
+            $table->increments('id');
+            $table->string('name');
+            $table->timestamps();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down() {
+        Schema::dropIfExists('locations');
+    }
+}

database/migrations/2017_12_10_011355_create_books_table.php

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+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+class CreateBooksTable extends Migration {
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up() {
+        Schema::create('books', function(Blueprint $table) {
+            $table->increments('id');
+            $table->string('barcode');
+            $table->string('name');
+            $table->integer('location_id')->nullable();
+            $table->timestamps();
+
+            $table->index('barcode');
+            $table->index('location_id');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down() {
+        Schema::dropIfExists('books');
+    }
+}

database/migrations/2017_12_10_011402_create_authors_table.php

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+<?php
+
+use Illuminate\Support\Facades\Schema;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Database\Migrations\Migration;
+
+class CreateAuthorsTable extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::create('authors', function (Blueprint $table) {
+            $table->increments('id');
+            $table->string('name');
+            $table->timestamps();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::dropIfExists('authors');
+    }
+}

database/migrations/2017_12_10_045252_create_book_authors_table.php

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+<?php
+
+use Illuminate\Support\Facades\Schema;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Database\Migrations\Migration;
+
+class CreateBookAuthorsTable extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::create('book_authors', function (Blueprint $table) {
+            $table->integer('book_id')->unsigned();
+            $table->integer('author_id')->unsigned();
+
+            $table->unique([ 'book_id', 'author_id' ]);
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::dropIfExists('book_authors');
+    }
+}