为动态键配置强参数 [英] Configuring strong parameters for dynamic keys

问题描述

我正在尝试提供一种表格，该表格允许管理员编辑特定模型Submission的所有值，就好像它是电子表格一样. Submission由一个字符串字段:domain组成.

I'm attempting to provide a form that allows an admin to edit all values of a particular model Submission, almost as though it was a spreadsheet. Submission is comprised of one string field :domain.

问题是，我无法弄清楚在这种情况下如何处理强大的参数.我已经找到了类似的例子来处理动态键，例如这一个，但我不太清楚如何应用它们.我的参数结构.我想我对tap的工作方式还不够清楚.

The problem is that I can't figure out how to deal with strong params within this context. I've found similar examples of dealing with dynamic keys like this one but I can't quite figure out how to apply them to my parameter structure. I think I'm just not clear enough on how tap works.

这是我的参数示例:

{"3"=>{"domain"=>"domain3"}, "2"=>{"domain"=>"domain2"}, "1"=>{"domain"=>"domain1"}

如果有帮助，这是我正在使用的表格:

In case it helps, here's the form I'm using:

<%= form_tag update_multiple_submissions_path, method: :put do %>
    <table data-toggle="table" data-sort-name = "domain" data-sort-order = "desc">
        <thead>
            <th data-field="domain" data-sortable="true">Domain</th>
        </thead>
        <tbody>
            <% @submissions.each do |submission| %>
                <%= simple_fields_for "submissions[]", submission, defaults: {label: false} do |f| %>
                    <tr>
                        <td><%= submission.domain %><%= f.input :domain %></td>
                    </tr>
                <% end %>
            <% end %>
        </tbody>
    <table>
    <%= submit_tag "Save" %>
<% end %>

如果您好奇的话，这是我控制器中的update_multiple方法.如果看起来很熟悉，我会从railscast获得轮廓，该轮廓在rails3中非常有效，然后(无处不在)强大的参数普遍存在.

And in case you're curious, here's the update_multiple method from my controller. If this looks familiar, I got the outline from a railscast, which was very effective in rails3 before strong params was (were?) ubiquitous.

  def update_multiple
    logger.debug "update_multiple #{submission_params}"
    @submissions = Submission.update(submission_params[:submissions].keys, params[:submissions].values)

    flash[:notice] = "Updated Submissions"

    redirect_to review_submissions_path
  end

如果我完全使用params.permit!绕过强壮的婴儿车，这将非常有效，但是，当然，这是不可接受的解决方案.

This works very well if I bypass strong prams altogether using params.permit! but, of course, this is an unacceptable solution.

感谢您的帮助！

推荐答案

您可以使用虚拟"模型(没有表的模型):

You can use a "virtual" model (a model without a table):

class SubmissionFormCollection
  include ActiveModel::Model

  attr_accessor :submissions
end

---

def edit_multiple
  @collection = SubmissionFormCollection.new(
    Submission.all
  )
end

---

<% simple_form_for(@collection, as: :some_param_key, path: update_multiple_submissions_path, method: :put) do |f| %>
  <%= f.fields_for(:submissions) do |s| %>
    <%= s.input :domain %></td>
  <% end %>
<% end %>

---

params.require(:some_param_key)
      .permit(submissions: [:domain])

尽管我可能会使用ajax并将其作为一系列原子性的PATCH请求，而不是针对每个已编辑的项目执行，因为它会提供直接的用户反馈和更好的API.

Although I would probably use ajax and perform it as a series of atomical PATCH requests for each item edited instead as it will give direct user feedback and a better API.

这篇关于为动态键配置强参数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IT屋！