ASP.NET Core Web API: why do I need a ModelState check in a Get request?

Question

VS 2015 automatically generates the following code:

// GET: api/Companies/5
[HttpGet("{id}")]
public async Task<IActionResult> GetCompany([FromRoute] int id)
{
    if (!ModelState.IsValid)
    {
        return BadRequest(ModelState);
    }

    Company company = await _context.Companies.SingleOrDefaultAsync(m => m.Id == id);

    if (company == null)
    {
        return NotFound();
    }

    return Ok(company);
}

What is the point of validating ModelState here?

Answer 1

I assume you used the Web Api template. Since you did not start with the "Empty" template, the code generated by VS is what the Microsoft team considered "good practice."

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