Laravel 5.2 Foreign Key fails - php

Question

I am trying to add a foreign key in my posts table to reference the id in the users table. Here are my migrations, the users table is the default one packed with laravel so the timestamps are from NOV 2014 however the posts is one I created. Any help greatly appreciated.
Thanks a lot :)
Users migration
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Database\Migrations\Migration;
class CreateUsersTable extends Migration
{
/**
* Run the migrations.
*
* #return void
*/
public function up()
{
Schema::create('users', function (Blueprint $table) {
$table->increments('id')->unsigned();
$table->string('name')->unique();
$table->string('email')->unique();
$table->string('password');
$table->rememberToken();
$table->timestamps();
});
}
/**
* Reverse the migrations.
*
* #return void
*/
public function down()
{
Schema::drop('users');
}
}
posts migration
<?php
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Database\Migrations\Migration;
class CreatePostsTable extends Migration
{
/**
* Run the migrations.
*
* #return void
*/
public function up()
{
Schema::create('posts', function (Blueprint $table) {
$table->increments('id')->unsigned();
$table->string('title');
$table->string('section');
$table->string('body');
$table->date('post_created_date');
$table->integer('author_id')->unsigned()->after('id');
$table->foreign('author_id')->references('id')->on('users');
$table->timestamps();
});
}
/**
* Reverse the migrations.
*
* #return void
*/
public function down()
{
Schema::drop('posts');
}
}
Every time I migrate I get the following error:

Answer 1

If you are creating a table, you don't want to use after as it will create a syntax error. Just place the column where you want it. I believe after will only work for alter table statements.
Schema::create('posts', function (Blueprint $table) {
$table->increments('id'); // Unsigned is assumed for increments so I removed that as well
$table->integer('author_id')->unsigned();
$table->string('title');
$table->string('section');
$table->string('body');
$table->date('post_created_date');
$table->timestamps();
$table->foreign('author_id')->references('id')->on('users');
});
Then in your model, you'd setup the relationship to your users table like so...
public function author()
{
return $this->belongsTo(User::class, 'author_id');
}
Feel free to rename the function however you want, I usually prefer to name it something that matches the foreign key.
Then you'd use it like $post->author->name.

Answer 2

In your CreatePostsTable class, can you try this ?
public function up()
{
Schema::create('posts', function (Blueprint $table) {
$table->increments('id');
$table->integer('author_id')->unsigned();
$table->string('title');
$table->string('section');
$table->string('body');
$table->date('post_created_date');
$table->timestamps();
});
Schema::table('posts', function($table) {
$table->foreign('author_id')->references('id')->on('users');
});
}