OpenApi 3 multipart form request for complex type array
I created a new Asp.Net Core 5.0 Web API project and I try to upload a file together with other properties. One of this properties is a list of other elements which I have defined. The data model looks like this:
public class Person
{
public string Surname { get; set; }
public string FamilyName { get; set; }
public IFormFile Image { get; set; }
public List<Item> Items { get; set; } = new List<Item>();
}
public class Item
{
public string Value { get; set; }
public string Description { get; set; }
}
It seems that the swagger doc generates the proper file with the proper UI. Unfortunately I don't know which format the data must be so that the ASP.NET Core model binder translates it into a valid model. I tried to insert some json object into the "Items" box but my list stays empty all the time.
The controller action is pretty standard:
[HttpPost]
public ActionResult Post([FromForm] Person p)
{
if (ModelState.IsValid)
{
return Ok();
}
return BadRequest();
}
The UI looks like this.
I didn't found a neat solution so far but I wrote a custom model binder like described here. So basically the request has two parts. One with the file and one with the whole JSON data.