Scalar array-types are not handled properly

[slzhengwc]

This may be a result of #3.

Our case is like the following.

scalar Interval

type ThingWithInterval {
  interval: Interval
}

Interval is mapped to a corresponding type, like so:

type Interval {
  start: number;
  end: number;
}

From server to client (using Apollo), we serialize the Interval like so:

serialize(value: Interval) {
    return [value.start, value.end];
},

Then we deserialize the serialized-Interval using this custom scalars exchange like so:

Interval(v) {
   console.log("Interval input: ", v);
   return new Interval(v[0], v[1]);
}

The code runs the deserializer twice: once for each number in the serialized array-version of Interval.

For example, let us say the serialized Interval the client got was [100, 200]. Then the output from the console.log in the deserializer would be:

Interval input: 100
Interval input: 200

Instead, we would expect the deserializer should run on the entire array. Then, the output from the console.log would be:

Interval input: [100,200]