强参数不接受数组 [英] strong parameters not accepting array
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
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