我有一个对象追随者，其中包含对象等级（类：等级，成员：$uid，$abelGrade）。我想在数据库表“成绩”中显示所有成绩。所以我为我的视图分配了一个成绩（一个成绩数组），我写了这个代码：
<f:form.select property="grade" value="{adherent.grade.labelGrade}" options="{grades}" optionValueField="uid" optionLabelField="labelGrade" size="1" id="category" />
但问题是它没有显示任何内容。可能是什么问题呢？
The problem could be missing $grade->getUid() and $grade->getLabelGrade() methods. These are called due to the optionValueField and optionLabelField. If thats not the problem, set a breakpoint where you assign the {grades} array to the view and check if it's really an array or an ObjectStorage. Thats everything I can think of right now, maybe you'd like to provide some further code.