Illuminate\Database\QueryException: SQLSTATE [HY000]: General error: 1364 Field

 Illuminate\Database\QueryException: SQLSTATE [HY000]: General error: 1364 Field 
   Illuminate\Database\QueryException: SQLSTATE [HY000]: General error: 1364 Field 'user_id' does not have a default value (SQL:insert into `posts` (`created_at`, `updated_at`, `subject`, `message`, `name`) 11:02:132:132:132:132, She looked at the back of her hat, and said, "I'll have a lot of grass." Giovanni was looking at the back of her hat.The crane did not blow the whistle that it had done again."You're a rabbit, aren't you?" "You're all in the blue sky." I asked Campanella."No, the forest," said Jovanni, "don't be too busy, and take your white clothes off the river.", Yoshimoto Kyosuke))

 laravel-app/app/Post.php

use Illuminate\Database\Eloquent\Model;

class Post extensions Model
{
    /**
     * Obtain Users Who Own Post Data
     */
    public function user()
    {
     return$this->belongsTo('App\User');
    }
    
     // assignment authorization
     protected$fillable=[
        'name',
        'subject',
        'message', 
        'user_id',
        # 'category_id'
    ];

laravel-app/database/migrations/2021_03_10_101736_create_posts_table.php


use Illuminate\Support\Facades\Schema;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Database\Migration;

class CreatePostsTable extensions Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('posts', function(Blueprint$table){
            $table->bigIncrements('id');
            $table->timestamps();
            $table->string('is_deleted',4)->default('0');
            # $table-> integer('category_id');
            $table->string('subject');
            $table->text('message');
            $table->string('name');
            $table->unsignedBigInteger('user_id');# Added
            $table->foreign('user_id')->references('id')->on('users');# Added
        });
    }

laravel-app/database/seeds/PostsTableSeeder.php

use Illuminate\Database\Seeder;

class PostsTableSeeder extensions Seeder
{
    /**
     * Run the database seeds.
     *
     * @return void
     */
    public function run()
    {
        factory(App\Post::class,50)
            ->create()
            ->each(function($post){
                $comments=factory(App\Comment::class,2) - > make();
                $post->comments()->saveMany($comments);
            }
        );
    }
}

$ phpartisan migrate —refresh
Dropped all tables successfully.
Migration table created successfully.
$  phpartisan db:seed

Exception trace:

  1 PDOException::("SQLSTATE [HY000]: General error: 1364 Field 'user_id' does not have a default value")
      /var/www/html/larvel-app/vendor/larvel/framework/src/Illuminate/Database/Connection.php:458

  2PDOSstatement::execute()
      /var/www/html/larvel-app/vendor/larvel/framework/src/Illuminate/Database/Connection.php:458
end