Github user guoyuepeng commented on a diff in the pull request: https://github.com/apache/incubator-griffin/pull/442#discussion_r228217972 --- Diff: service/src/main/java/org/apache/griffin/core/measure/entity/Rule.java --- @@ -81,6 +81,9 @@ Licensed to the Apache Software Foundation (ASF) under one @Column(name = "\"out\"") private String out; + @JsonInclude(JsonInclude.Include.NON_NULL) --- End diff -- I think the default value is false by current implementation.
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