Transform JSON Scalar

[EthanNC]

I am using mesh for the CoinGecko API. As you can probably see all the data is returned as JSON. Mesh turns all the return types into JSON scalar. The result is that any query returns all the data and I cant specify certain subfields. I am wondering, is there a way I can transform these JSON scalars?

[ardatan]

@EthanNC You can use JSON Schema handler by providing sample responses instead of OpenAPI handler because it seems the openapi schema you sent doesn't have schemas for responses.

[EthanNC]

I'll give that a try. Thanks for the quick response

[EthanNC]

@EthanNC You can use JSON Schema handler by providing sample responses instead of OpenAPI handler because it seems the openapi schema you sent doesn't have schemas for responses.

Having issues getting this working for a simple route. Any suggestion would be most appreciated.

meshrc.yml

sources:
  - name: coingecko
    handler:
      jsonSchema:
        baseUrl: https://api.coingecko.com/api/v3
        operations:
          - type: Query
            field: trending
            path: /search/trending
            method: GET
            responseSchema: ./json-schemas/trending.json

/json-schemas/trending.json

{
    "$ref": "#/definitions/Coin",
    "definitions": {
        "Coin": {
            "type": "object",
            "title": "Coin",
            "description": "Get trending search coins (Top-7) on CoinGecko in the last 24 hours",
            "properties": {
                "id": {
                    "type": "string"
                },
                "name": {
                    "type": "string"
                },
                "symbol": {
                    "type": "string"
                },
                "market_cap_rank": {
                    "type": "number"
                },
                "thumb": {
                    "type": "string"
                },
                "large": {
                    "type": "string"
                },
                "score": {
                    "type": "number"
                }
            }
        }
    }
}

[ardatan]

Your definition represents a single Coin. But that route returns an object that has two properties; items and exchanges. items returns an array of Coin. You can give a sample response to responseSample instead of creating a schema on your own.

[EthanNC]

Thats so much easier than writing the schema out for each query. Thanks for the clarification.