Can't send empty fields to DDLRecordService.addRecord from remote service

• Type: Bug
• Status: In Review
• Resolution: Unresolved
• Affects Version/s: 6.2.1 CE GA2
• Fix Version/s: None
• Component/s: Web Services, Web Services > JSON WS
• Labels: None
• Fix Priority: 4
• Git Pull Request: https://github.com/jmnavarro/liferay-portal/pull/23

When you're calling DDLRecordService.addRecord using its remote service and you include a field with empty string as value, we get following exception:

{ 
  "exception": "Missing value at character 94"
}

The request sent is (field "Text_Box3125" is the cause of the error)

POST http://localhost:8080/api/jsonws/invoke

[{"/ddlrecord/add-record": {
  "+serviceContext": "com.liferay.portal.service.ServiceContext",
        "displayIndex": "0",
        "fieldsMap":         {
            "6_1_": false,
            "Description": "Add your description here...",
            "Enterprise_Edition": false,
            "Text_Box3125": "",
            "Title": "34543534534"
        },
        "groupId": "10181",
        "recordSetId": "13006",
        "serviceContext.scopeGroupId": "10181",
        "serviceContext.userId": "10198"
    }
}]

Also, if you send in the same field "." instead of "", you get a weird error

{
  "exception": "For input string: \".\""
}