具有空对象的记录类型的 Avro 架构

Question

我正在尝试为下面的json创建avro模式

{
"id": "TEST",
"status": "status",
"timestamp": "2019-01-01T00:00:22-03:00",
"comment":  "add comments or replace it with adSummary data",
"error": { 
"code": "ER1212132",
"msg": "error message"
}
}

错误对象是可选的，它可能是 "错误" ：{} 下面是没有默认值的 avro 架构

{
"type" : "record",
"name" : "Order",
"fields" : [ {
"name" : "id",
"type" : "string"
}, {
"name" : "status",
"type" : "string"
}, {
"name" : "timestamp",
"type" : "string"
}, {
"name" : "comment",
"type" :  ["null","string"],
"default": null
}, {
"name" : "error",
"type" : {
"type" : "record",
"name" : "error",
"fields" : [ {
"name" : "code",
"type" : "string"
}, {
"name" : "msg",
"type" : "string"
} ]
}
} ]
}

如何为 json 中的错误字段添加默认值 {}。

Answer 1

{
"type" : "record",
"name" : "Order",
"fields" : [ {
"name" : "id",
"type" : "string"
}, {
"name" : "status",
"type" : "string"
}, {
"name" : "timestamp",
"type" : "string"
}, {
"name" : "comment",
"type" :  ["null","string"],
"default": null
}, {
"name" : "error",
"type" : [{"type": "record", "fields":[{"name": "code", "type":"string"}, {"name": "msg", "type":"string"}]}, {"type": "record", "fields":[]}]

} ]
}