Why graphql does not return JSON?

Detailed explanation of the problem is written here:

https://stackoverflow.com/questions/57557517/how-to-get-json-response-in-flask-graphql-response

`graphql` returns JSON as a string. Is it possible to return JSON object instead of a string?

未指定檔案或測試。首先追蹤 Flask-GraphQL 的回應入口點，並閱讀連結的 Stack Overflow 說明；當 GraphQL 回應以 JSON 物件而不是 JSON 字串的形式傳回時，工作就完成了。

由索引模型根據 Issue 內容生成。