AfterFilter附加对象时$ref引用出现null属性名($ref: "$.data[0].null")

[supenBenny]

category:是通过AfterFilter加入的
category2:对象本身定义的属性

fastjson/src/main/java/com/alibaba/fastjson/serializer/AfterFilter.java

Line 24 in e2cfb4f

serializer.writeKeyValue(seperator, key, value);

  protected final void writeKeyValue(char seperator, String key, Object value) {
        if (seperator != '\0') {
            out.write(seperator);
        }
        out.writeFieldName(key);
        write(value);
    }

JSONSerializer.write 方法未传递fieldName，此处可以改为writeWithFieldName

最终JSONSerializer.setContext 时fieldName为空。

[wenshao]

能否提供一个重现问题的testcase

[supenBenny]

能否提供一个重现问题的testcase

RefAfterFilterTest.zip
已提供RefAfterFilterTest.main,执行结果
[{"category":{"name":"category"},"name":"item1","afterFilterCategory":{"name":"afterFilterCategory"}},{"category":{"$ref":"$[0].category"},"name":"item2","afterFilterCategory":{"$ref":"$[0].null"}}]

[supenBenny]

@wenshao 另外一个问题由于当前线程变量serializerLocal置空引发的

RefAfterFilterTest-null.zip
Exception in thread "main" java.lang.NullPointerException at com.alibaba.fastjson.serializer.AfterFilter.writeKeyValue(AfterFilter.java:24) at com.alibaba.fastjson.serializer.RefAfterFilterTest.writeAfter(RefAfterFilterTest.java:27) at com.alibaba.fastjson.serializer.AfterFilter.writeAfter(AfterFilter.java:16) at com.alibaba.fastjson.serializer.JavaBeanSerializer.writeAfter(JavaBeanSerializer.java:834)