Use Relational Storage

import { Model, Serializer } from "survey-core";

// Optional: a custom property for richer mapping, editable in Creator's property grid
Serializer.addProperty("question", { name: "dbColumn", category: "data" });

// valueName fixes the key your columns read → response: { "customer_email": "...", "amount": 1840.5 }
const survey = new Model(definitions[definitionVersion]);

// Post the original response with the version of the definition it was filled against
survey.onComplete.add(async (sender) => {
  await fetch("/api/claims", {
    method: "POST",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify({ data: sender.data, definitionVersion })
  });
});

// POST /api/claims — original JSON first, then the columns you query
Route::post('/api/claims', function (Request $request) {
    // The raw body, not $request->input(): PHP arrays would turn {} into [] in the stored JSON
    $body = json_decode($request->getContent(), flags: JSON_THROW_ON_ERROR);
    abort_unless(isset($body->data, $body->definitionVersion), 400, 'Expected { data, definitionVersion }');

    $id = DB::transaction(function () use ($body) {
        $responseId = StoredJson::insertResponse('claim', $body->data, [          // the original, stored as it arrived: 1.0 stays 1.0
            'definition_version' => $body->definitionVersion,                    // keep the original and its version
        ]);
        DB::table('claims')->insert([                                            // keys come from valueName
            'response_id' => $responseId,
            'customer_email' => $body->data->customer_email ?? null,
            'amount' => $body->data->amount ?? null,
        ]);

        return $responseId;
    });

    return response()->json(['id' => $id], 201);
});