models.Category.findAll 返回一个数组.通过执行 setCategories([category]); 您将该数组包装在一个数组中.尝试将其更改为 setCategories(category); 而不是

models.Category.findAll returns an array. By doing setCategories([category]); you are wrapping that array in an array. Try changing it to setCategories(category); instead