Question

我有一个应用程序，允许用户上传广告素材并将其分配到多个星期

周模型

  class Week < ActiveRecord::Base

    has_many :creative_weeks
    has_many :creatives, :through => :creative_weeks

  end

广告模型

  class Creative < ActiveRecord::Base

    has_many :creative_weeks
    has_many :weeks, :through => :creative_weeks

    mount_uploader :image, CreativeUploader

 end

广告周[加入表格]

  class CreativeWeek < ActiveRecord::Base
    belongs_to :week
    belongs_to :creative
  end

我知道该协会的工作原理允许我根据我的控制台向多个星期发布广告素材：

 2.0.0p353 :020 > c = Creative.first
   Creative Load (0.2ms)  SELECT "creatives".* FROM "creatives" ORDER BY "creatives"."id" ASC LIMIT 1
    => #<Creative id: 10, name: "", account_id: 1, week_id: nil, campaign_id: 1, image:       "Quakes_2013_DigiOOH_40YR_704x496.jpg", created_at: "2014-02-20 18:13:47", u
    pdated_at: "2014-02-20 18:13:47"> 
 2.0.0p353 :021 > c.week_ids
    (0.2ms)  SELECT "weeks".id FROM "weeks" INNER JOIN "creative_weeks" ON "weeks"."id" =    "creative_weeks"."week_id" WHERE "creative_weeks"."creative_id" = ?  [["
    creative_id", 10]]
    => [3] 
2.0.0p353 :022 > c.week_ids = [1, 2, 3]
   Week Load (0.2ms)  SELECT "weeks".* FROM "weeks" WHERE "weeks"."id" IN (1, 2, 3)
   Week Load (0.1ms)  SELECT "weeks".* FROM "weeks" INNER JOIN "creative_weeks" ON "weeks"."id" = "creative_weeks"."week_id" WHERE "creative_weeks"."creative_id" 
   = ?  [["creative_id", 10]]
(0.1ms)  begin transaction
SQL (0.3ms)  INSERT INTO "creative_weeks" ("created_at", "creative_id", "updated_at", "week_id")  VALUES (?, ?, ?, ?)  [["created_at", Thu, 20 Feb 2014 18:20:27
UTC +00:00], ["creative_id", 10], ["updated_at", Thu, 20 Feb 2014 18:20:27 UTC +00:00],   ["week_id", 1]]
SQL (0.1ms)  INSERT INTO "creative_weeks" ("created_at", "creative_id", "updated_at", "week_id")    VALUES (?, ?, ?, ?)  [["created_at", Thu, 20 Feb 2014 18:20:27
UTC +00:00], ["creative_id", 10], ["updated_at", Thu, 20 Feb 2014 18:20:27 UTC +00:00],   ["week_id", 2]]
(1.0ms)  commit transaction
  => [1, 2, 3] 
2.0.0p353 :023 >

我遇到的问题是在前端使用相同的功能。它只传递一个值，通常是最后选择的值

以我的形式：

<div class="field">
<%= f.collection_select(:week_ids, Week.all, :id, :start_at, {}, multiple: true, name: 'creative[week_ids]') %>
</div>

任何人都可以告诉我我错过了什么吗？

TIA

Answer 1

将选择标记的名称更改为：

name: 'creative[week_ids][]'

名称末尾的额外'[]'指定您希望发布一组值。

使用强参数，您必须指定该值为数组：

def your_strong_params
  params.require(:creative).permit(week_ids: [])
end

MultiSelect不传递多个值

1 个答案: