reactjs - 添加基于 react json 模式表单下拉选择的属性

Question

我的架构：

{
 type: "object",
 required: [
 "title",
 "type",
],
definitions: {
  typeSelectorDef: {
   type: "string"
  }
},
properties: {
 title: {
   type: "string",
   title: "Title"
 },
 type: {
   type: "string",
   title: “Type",
   enum: ["a1" ,"a2","a3"],
  }
 }
}

当我选择类型下拉列表时，我想在 typeSelectorDef 中添加属性。就是这样

definitions: {
 typeSelectorDef: {
   type: "string",
   selectedIndex:"a2"
 }
}

当 onchange 事件在表单中被触发时，我为在对象中添加属性做了定义黑客

const onChange = formData => {
  let modifiedSchema = { …selectedSchema };
  modifiedSchema.schema.definitions.TypeSelectorDef["selectedIndex"] = _.get(
  formData,
  “type",
  “A1"
 );
}

我怎样才能更干净地编写代码？