jobtrackingapp/Controller/CompaniesController.cs

using JobTrackerApi.Data;
using JobTrackerApi.Models;
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;

namespace JobTrackerApi.Controllers
{
    [ApiController]
    [Route("api/[controller]")]
    public class CompaniesController : ControllerBase
    {
        private readonly JobTrackerContext _context;
        public CompaniesController(JobTrackerContext context) => _context = context;

        [HttpGet]
        public async Task<IEnumerable<Company>> Get() =>
            await _context.Companies.Include(c => c.Jobs).ToListAsync();

        [HttpPost]
        public async Task<ActionResult<Company>> Post(Company company)
        {
            _context.Companies.Add(company);
            await _context.SaveChangesAsync();
            return CreatedAtAction(nameof(Get), new { id = company.Id }, company);
        }
    }
}