Recordable<T = any, K = string> = Record<K extends null | undefined ? string : K, T>

这是一个 TypeScript 中的类型别名，它定义了一个泛型 Recordable 类型。Recordable 类型是一个对象类型，其中的属性名为 K 类型的属性名，属性值为 T 类型的属性值。

如果 K 类型为 null 或 undefined，则属性名为 string 类型。

例如，如果我们使用 Recordable<number, "foo" | "bar">，则生成的类型为：

{
  foo: number;
  bar: number;
}

相关问题

// 获取表单值 const form = getFieldsValue(); // 条件值的component类型会随着字段的变化发生变化 // 条件值发生变化时获取当前字段列详细数据 const currentFieldData = columnOptions.value.find( (item: Recordable) => item.value === form.field, ) as unknown as Recordable; // 根据字段label const fieldLabel = columnOptions.value.find((item) => item.value === form?.field)?.label; // 判断条件 const conditionType = ARITHMETIC_OPERATOR_BACK.find( (item) => item.value === form?.op, )?.operate; if (form.op === ConditionTypeEnum.IS_NULL || form.op === ConditionTypeEnum.IS_NOT_NULL) { // 判断条件为空、非空时，清空条件值 conditionName = ${fieldLabel ?? ''}${conditionType ?? ''}; } else { // 字段值和判断条件发生变化 let labelText; // 字段变化 if (key === 'field') { if (currentFieldData?.component !== FormElementEnum.SWITCH) { // 清空条件值 await setFieldsValue({ value: undefined }); labelText = ''; } else { await setFieldsValue({ value: 0 }); labelText = '否'; } } else { // 判断条件和条件值变化 // 当前字段有值集时，component类型为ApiSelect if (currentFieldData?.component === FormElementEnum.API_SELECT) { const fieldVsList = await getVsList(currentFieldData.vsId); labelText = fieldVsList?.find( (item: Recordable) => item.itemValue === form.value, )?.itemText; } else if (currentFieldData?.component === FormElementEnum.SWITCH) { // 当前字段类型为boolean时，component类型为Switch，条件值为开关 labelText = form.value === 1 ? '是' : '否'; } else { // 其他 labelText = form.value; } } conditionName = ${fieldLabel ?? ''}${conditionType ?? ''}${labelText ?? ''}; }简化if语句

可以将 if-else 语句简化为三目运算符，如下所示：

conditionName = form.op === ConditionTypeEnum.IS_NULL || form.op === ConditionTypeEnum.IS_NOT_NULL
  ? `${fieldLabel ?? ''}${conditionType ?? ''}`
  : key === 'field'
    ? currentFieldData?.component !== FormElementEnum.SWITCH
      ? (await setFieldsValue({ value: undefined }), '')
      : (await setFieldsValue({ value: 0 }), '否')
    : currentFieldData?.component === FormElementEnum.API_SELECT
      ? ((await getVsList(currentFieldData.vsId)), labelText = fieldVsList?.find((item: Recordable) => item.itemValue === form.value)?.itemText)
      : currentFieldData?.component === FormElementEnum.SWITCH
        ? (labelText = form.value === 1 ? '是' : '否')
        : (labelText = form.value, '');

这样可以减少代码量，使代码更加简洁。

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