Thanks for reply.

Sadly it does not work that way (here). Even:

{
  "name" : "ARecord",
  "type" : "record",
  "namespace" : "A",
  "fields" : [
    {"name": "id", "type": "string" },
    {
      "name": "B",
      "type":  {
        "type": "record",
        "name": "BRecord",
        "fields": [
          {
            "name": "C",
            "type": "string"
          }
        ]
      }
    }
  ]
}

does not require C. And that's not what I want ... I'd like optional B, and
once user provide B, then B.C is required.

Martin.


2017-11-27 15:06 GMT+01:00 Dan Schmitt <dan.schm...@gmail.com>:

>       "name": "B",
>       "type": ["null", {
>
> The [] union lets you do null or a BRecord, your JSON does null.
> Pull the null from the union and it will require the C.
>
> On Mon, Nov 27, 2017 at 9:00 AM, Martin Mucha <alfon...@gmail.com> wrote:
> > Hi,
> >
> > I have this avro schema:
> >
> > {
> >   "name" : "ARecord",
> >   "type" : "record",
> >   "namespace" : "A",
> >   "fields" : [
> >     {"name": "id", "type": "string" },
> >     {
> >       "name": "B",
> >       "type": ["null", {
> >         "type": "record",
> >         "name": "BRecord",
> >         "fields": [
> >           {
> >             "name": "C",
> >             "type": "string"
> >           }
> >         ]
> >       }]
> >     }
> >   ]
> > }
> >
> >
> > and following JSON, which validates against it:
> >
> > {
> >   "id": "...",
> >   "B": {
> >
> >   }
> > }
> >
> >
> > I would expect, that C is required. Why it's not? What shall I do to
> make it
> > required?
> >
> > Thanks!
> > Martin.
>

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