当单元为空时，Drools会生成空的“ when”子句

Question

我创建了以下规则模板，以制定仅在特定单元格为空时才应执行的规则：

template header
synonym
question
decision

package org.test.templates

import org.test.beans.DiseaseBean

template "disease_decisions"

rule "Disease_@{row.rowNumber}"
    when
        $disease: DiseaseBean(longDesc == "@{synonym}" && "" == "@{question}")
    then
        $disease.setDecision("@{decision}")
end
end template

执行上述模板后，Drools将为问题单元格为空的行生成空的“ when”子句。例如：

rule "Disease_279"
    when

    then
        $disease.setDecision("Approve")
end

有什么想法我做错了吗？

Drools 7.3.0