strong_params：处理嵌套对象/属性的动态数量

Question

The Problem

I have a model Foo that can accept nested attributes for a model Bar. Using rails conventions for nested models in forms, form_for and fields_for create a params hash of the form:

{...
  :foo => {
    :name => "Lunes",
    :bar_attributes => {
      1 => {
         label: "gato"
         },
      2 => {
         label: "perro"
         }
    }
  }
}

But, strong_params wants me to explicitly whitelist each attribute.

def foo_params
  params.require(:foo).permit(:name, bar_attributes: {1: [:label], 2: [:label]}
end

The question:

The number of hashes in :bar_attributes is dynamic. Do I need to dynamically generate my foo_params method, specifically the :bar_attributes hash? Or is there a way to whitelist the params that I want generally, and not for each individual sub-hash of :bar_attributes .

Answer 1

使用params.require(:foo).permit(:name, bar_attributes: [:label]}应该可以正常工作，但bar_attributes是bar_attributes键是字符串（即“ 1”和“ 2”而不是1和2）。