How to query for a null fields with graphql?

@samara 

In GraphQL, you can query for null fields by using the null keyword in the query. If you want to query for an object field that may be null, you can simply include the field in your query like normal. If the field is null, it will return null in the response.

For example, if you have a query like this:

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query {
  user(id: 1) {
    name
    age
    address
  }
}

If the address field in the user object is null, the response will look like this:

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{
  "data": {
    "user": {
      "name": "John Doe",
      "age": 30,
      "address": null
    }
  }
}

This means that the address field is null in the response. You can check for null values in your application code and handle them accordingly.