作为标记的行为

我试图在安装程序上使用我的Rails 5应用程序来获取标签。

我有一个叫做Randd :: Field.rb的模型，它有一个名为title的属性。 我想将这些标题用作提案模型的标签。

我的Proposal.rb具有：

class Proposal <ApplicationRecord include Statesman :: Adapters :: ActiveRecordQueries

  acts_as_taggable
  acts_as_taggable_on :randd_maturities, :randd_fields, :randd_purposes, :randd_activities

我的建议form.html.erb有：

<%= f.collection_select :randd_field_list, Randd::Field.order(:title), :id, :title, {}, {multiple: true} %>

我的提案控制器将randd_field_list列入白名单：

  def proposal_params
      params.require(:proposal).permit(:title, :randd_maturities_list, :randd_field_list, :randd_purposes_list, :randd_activities_list)

当我保存所有这些内容并尝试向提案中添加代码时，出现错误。 服务器日志显示：

Unpermitted parameter: randd_field_list

这没有任何意义，因为当属性在允许的参数中没有列入白名单时会出现问题 - 这是我所做的。

任何人都可以通过提案表单看到需要做什么来保存标签？

我发现gem文档令人困惑，因为它显示：

建立

class User <ActiveRecord :: Base acts_as_taggable＃acts_as_taggable_on的别名：tags acts_as_taggable_on：skills，：interest end

class UsersController <ApplicationController def user_params params.require（：user）.permit（：name，：tag_list）## Rails 4强参数用法end end

为什么不允许的参数包含：skill_list和an：interest_list，因为这些特定的模型被用作标签？ 我是否应该在我的建议允许参数中添加“tag_list”，即使可以添加的唯一标签来自我列出的特定模型中定义的标题：

acts_as_taggable_on :randd_maturities, :randd_fields, :randd_purposes, :randd_activities

服务器日志显示：

  ActsAsTaggableOn::Tagging Load (1.6ms)  SELECT "taggings".* FROM "taggings" WHERE "taggings"."taggable_id" = $1 AND "taggings"."taggable_type" = $2  [["taggable_id", 17], ["taggable_type", "Proposal"]]
  ActsAsTaggableOn::Tag Load (1.7ms)  SELECT "tags".* FROM "tags" INNER JOIN "taggings" ON "tags"."id" = "taggings"."tag_id" WHERE "taggings"."taggable_id" = $1 AND "taggings"."taggable_type" = $2 AND (taggings.context = 'randd_fields' AND taggings.tagger_id IS NULL)  [["taggable_id", 17], ["taggable_type", "Proposal"]]



  ActsAsTaggableOn::Tagging Load (2.8ms)  SELECT "taggings".* FROM "taggings" WHERE "taggings"."taggable_id" = $1 AND "taggings"."taggable_type" = $2  [["taggable_id", 17], ["taggable_type", "Proposal"]]
  ActsAsTaggableOn::Tag Load (3.0ms)  SELECT "tags".* FROM "tags" INNER JOIN "taggings" ON "tags"."id" = "taggings"."tag_id" WHERE "taggings"."taggable_id" = $1 AND "taggings"."taggable_type" = $2 AND (taggings.context = 'randd_fields' AND taggings.tagger_id IS NULL)  [["taggable_id", 17], ["taggable_type", "Proposal"]]
  Randd::Field Load (1.6ms)  SELECT "randd_fields".* FROM "randd_fields" ORDER BY "randd_fields"."title" ASC


Processing by ProposalsController#update as HTML
  Parameters: {"utf8"=>"✓", "authenticity_token"=>"BF7l9/0QTVN3A==", "proposal"=>{"title"=>"asdf", "byline"=>"asdf", , "randd_field_list"=>["", "1"], 

Unpermitted parameter: randd_field_list

---

您发送* _list参数的数组。 尝试在permit方法中为每个_list添加[]：

params.require(:proposal).permit(
  :title, 
  randd_maturities_list: [], 
  randd_field_list: [], 
  randd_purposes_list: [], 
  randd_activities_list: [])

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