does MessageToJsonString give special treatment to struct.proto messages?

[John Naylor]

If I copy struct.proto into a different namespace and convert messages based on it to JSON, the conversion adds extra maps to the data.

message built using struct.proto:

string_param: {

 "oid": "HelloWorld",

 "name": "My nice parameter",

 "type": "STRING",

 "readonly": true,

 "widget": "default",

 "precision": 2,

 "value": "Evacuate the studio!"

}

message built using the same code but in a different namespace:

native_string_param: {

 "oid": "HelloWorld",

 "name": "My nice parameter",

 "type": "STRING",

 "readonly": true,

 "widget": "default",

 "precision": 2,

 "value": {

  "string_value": "Evacuate the studio!"

 }

}

note the extra "string_value" mapping.

Is there a way to have MessageToJsonString treat the second type of message the same way as it does struct.proto ones?

Thanks!

[Adam Cozzette]

The Struct type is similar to some of the other well-known types like Timestamp and Duration which have their own custom JSON representation (see here). I'm afraid there is no easy way to replicate that functionality with a type other than Struct.

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