强参数不接受数组

本文介绍了强参数不接受数组的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我认为这是一个多选复选框

I have this in my view which is a multiselect checkbox

模型

class User < ActiveRecord::Base
  has_many :user_roles, :dependent => :destroy
  accepts_nested_attributes_for :user_roles, :allow_destroy => true
  has_many :roles, :through => :user_roles
end

查看

<%= check_box_tag 'user[role_ids][]', role.id, user.blank? ? nil : user.roles.include?(role) ,id: dom_id(role)%>

强参数写成

  def user
    params.require(:user).permit(:first_name,{:role_ids => []})
  end

但在创建时说

Processing by Admin::UsersController#create as HTML
  Parameters: {"utf8"=>"✓", "authenticity_token"=>"+y8iWya5KIILqS0embEUEZuClycXq0O9Q4pA+MnbM0g=", "user"=>{"first_name"=>"", "last_name"=>"", "email"=>"a@loclahost.com", "language"=>"en", "access_level_id"=>"1", "role_ids"=>["", "1", "", "5", "", "", ""], "password"=>"[FILTERED]", "password_confirmation"=>"[FILTERED]"}, "commit"=>"Create user"}

Unpermitted parameters: role_ids
Unpermitted parameters: role_ids
Unpermitted parameters: role_ids
Unpermitted parameters: role_ids

为什么不接受来自表单的 role_id 数组的任何线索?

Any clue why is it not accepting the array of role_ids which is coming from form?

推荐答案

回答我自己，我不是直接工作，而是以下方法来自强参数问题讨论帮助我将普通参数转换为白名单参数.

Answering myself, I got it working not directly, but the below method from the Strong Parameters issues discussion helped me in converting a normal parameter to a whitelisted one.

def user_params
  params.require(:user).permit(:first_name).tap do |whitelisted|
    whitelisted[:role_ids] = params[:user][:role_ids]
  end
end

这篇关于强参数不接受数组的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！