Rails，嵌套对象视图中的额外行。 （更新）

Question

那里！

更新：https://github.com/czepesch/gloss - 公开 repo。

主题：我需要删除或阻止视图（表中）中的一个额外的空行。

我的 RoR 应用中有两个模型：Glossary 和 Entry

class Glossary < ApplicationRecord
  has_many :entries, dependent: :destroy
  accepts_nested_attributes_for :entries

class Entry < ApplicationRecord
  belongs_to :glossary
  
  validates :term, presence: true, uniqueness: true

将条目添加到词汇表的表单：

  = form_with(model: [@glossary, @entry], local: true) do |f|
    - if @entry.errors.any?
      - @entry.errors.each do |error|
        = error.full_message
      
          = f.text_field :term, :placeholder => 'term'
          = f.text_field :alt, :placeholder => 'alt'
          = f.text_field :target, :placeholder => 'target'
          = f.text_field :def, :placeholder => 'def'
          = f.submit 'add'

views/glossaries/show 中的表格（有点简化，为了便于阅读，我删除了顺风样式）

%table
  %thead
    %tr
      %th.{:scope => 'col'} term
      %th.{:scope => 'col'} alt
      %th.{:scope => 'col'} target
      %th.{:scope => 'col'} def
      %th.{:scope => 'col'}
        %span.sr-only edit
      %th{:scope => 'col'}
        %span.sr-only delete

  %tbody
    - for entry in @glossary.entries
      %tr
        %td= entry.term
        %td= entry.alt 
        %td= entry.target
        %td= entry.def
        %td
          = link_to edit_glossary_entry_path(@glossary)
        %td
          = link_to [@glossary, entry], data: { 'turbo_method': 'delete', turbo_confirm: "are you sure?" }

因此，任何词汇表的表（即使是新的，没有任何条目）都有一个额外的空行： extra row

我认为这与glossaries_controller 中的新 操作有关：

class GlossariesController < ApplicationController
  before_action :set_glossary, only: %i[ show edit update destroy ]

  def index
    @glossaries = Glossary.order(params[:sort])
  end

  def show
    @entry = @glossary.entries.new
  end

  def new
    @glossary = Glossary.new
  end
  
  def edit
  end

  def create
    @glossary = Glossary.new(glossary_params)

    respond_to do |format|
      if @glossary.save
        format.html { redirect_to glossary_path(@glossary), notice: "glossary was created." }
        format.json { render :show, status: :created, location: @glossary }
      else
        format.html { render :new, status: :unprocessable_entity }
        format.json { render json: @glossary.errors, status: :unprocessable_entity }
      end
    end
  end

  def update
    respond_to do |format|
      if @glossary.update(glossary_params)
        format.html { redirect_to glossary_path(@glossary), notice: "glossary was updated." }
        format.json { render :show, status: :ok, location: @glossary }
      else
        format.html { render :edit, status: :unprocessable_entity }
        format.json { render json: @glossary.errors, status: :unprocessable_entity }
      end
    end
  end

  def destroy
    @glossary.destroy

    respond_to do |format|
      format.html { redirect_to glossaries_url, notice: 'glossary was destroyed' }
      format.json { head :no_content }
    end
    # redirect_to root_path, status: :see_other
  end

  private
    def set_glossary
      @glossary = Glossary.find(params[:id])
    end

    def glossary_params
      params.require(:glossary).permit(:title, :description, entries_attributes: [ :term, :alt, :target, :def ])
    end
end

但我不知道如何让一切都以其他方式工作。

感谢任何帮助。

Answer 1

def show
    @entry = @glossary.entries.new
end

导致了“问题”。 我刚刚加了

- if entry.save

在视图中，一切看起来都很好。

感谢 Rockwell Rice 提供的帮助。