How to create a GraphQL response from json?

Client SDKs
, ,
1

Hi,
I have a saved json response of GetCustomersQuery and I’d like to instantiante the GetCustomersQuery.Data using that saved file. It is described in the docs but when I do it, I get the exception JSONDecodingError.missingValue

My local json structure is

{
  "data": {
    "customers_customers": [
      {
        "__typename": "customers_customers",
        "customer_id": "047eb02e-d28e-45a7-bafa-998e42ff3ae1"
      },
      {
        "__typename": "customers_customers",
        "customer_id": "442ef309-c3d1-4f4c-9b87-79783245188e"
      }
     ]
}


let jsonObject = try JSONSerialization.jsonObject(with: data) as! [String: AnyHashable]
do {
    let result = try GetCustomersQuery.Data(data: jsonObject, variables: [:])
    print(result.customers_customers)
} catch {
    print(error)
}

I see that MyQuery.Data also have other initializer such as public init(_dataDict: DataDict)

Is this the correct way of doing it?

ps: I’m aware thast Apollo also provides the generated mocks but want I want to test if an actual network response decodes as expected.

thanks!

2

So my mistake was that the json root element was the data key. The json need to contain directly the type of the data. So in this case


{
    "customers_customers": [
      {
        "__typename": "customers_customers",
        "customer_id": "047eb02e-d28e-45a7-bafa-998e42ff3ae1"
      },
      {
        "__typename": "customers_customers",
        "customer_id": "442ef309-c3d1-4f4c-9b87-79783245188e"
      }
}

Then the initializer using the data works:

let result = try GetCustomersQuery.Data(data: jsonObject, variables: [:])
print(result.customers_customers)
1 Like
3

Any example of how can we do this on React? Am trying to parse a json response, and pass it to a module expecting apollo-graphql response.

This is what I am trying, but it is not reading the data correctly:

const client = new ApolloClient({
  cache: new InMemoryCache({ addTypename: true })
});

client.cache.writeQuery({
  query: __Query,
  data: ratingDataWithoutTypename,
});
const ratingSummaryData = client.cache.readQuery<RatingQuery>({ query: __Query });
console.log('>>> ratingSummaryData:', ratingSummaryData);