liwo/database/migrations/2021_03_02_082607_create_tasks_table.php

<?php

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

class CreateTasksTable extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('tasks', function (Blueprint $table) {
            $table->id();
            $table->unsignedBigInteger('business_id');
            $table->unsignedBigInteger('project_id');
            $table->unsignedBigInteger('creator_id');
            $table->unsignedBigInteger('assignee_id')->nullable();
            $table->unsignedBigInteger('system_id')->nullable();
            $table->unsignedBigInteger('sprint_id')->nullable();
            $table->unsignedBigInteger('workflow_id');
            $table->unsignedBigInteger('status_id');
            $table->unsignedBigInteger('approver_id')->nullable();

            $table->string('title');
            $table->text('description')->nullable();
            $table->integer('priority')->default(1);
            $table->boolean('on_time')->default(true);
            $table->boolean('ready_to_test')->default(false);

            $table->json('watchers')->nullable();

            $table->integer('spent_time')->default(0);
            $table->integer('estimated_time')->default(0);
            $table->date('due_date')->nullable();
            $table->date('completed_at')->nullable();
            $table->timestamp('work_start')->nullable();
            $table->timestamp('work_finish')->nullable();
            $table->timestamps();
        });
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        Schema::dropIfExists('tasks');
    }
}