将嵌套属性与用户相关联 [英] Associating nested attributes to user

问题描述

我正在尝试使用 Rails 4.1 构建一个小额费用跟踪应用程序.使用设备进行授权.费用及其嵌套属性，评论属于用户.在模型中建立关联，费用与用户相关联.这是费用控制器:

class ExpensesController <应用控制器定义新@expense = Expense.new@item = @expense.items.build#@comment = @expense.comments.build结尾定义索引@expenses = Expense.all#@items = Item.where(:expense_id => @expense.id)结尾高清秀@expense = Expense.find(params[:id])@items = Item.where(:expense_id =>@expense.id)结尾定义创建@expense = current_user.expenses.new(expense_params)response_to do |格式|如果@expense.saveExpenseMailer.expense_submission(@expense).deliverformat.html { redirect_to @expense，注意:'费用报告已提交.'}format.json { 渲染:显示，状态::创建，位置:@expense }别的format.html { 渲染:新}format.json { 渲染 json: @expense.errors, 状态: :unprocessable_entity }结尾结尾结尾定义编辑@expense = Expense.find(params[:id])结尾定义更新@expense = Expense.find(params[:id])#@comment = @expense.comments.build如果@expense.update(expense_params)#if @comment.save#ExpenseMailer.comments_ added(@expense).deliverflash[:notice] = "费用报告更新"重定向到费用路径#别的# flash[:notice] = "费用报告更新"#redirect_to费用_路径##结尾别的渲染编辑"结尾结尾

构建注释属性的表单如下所示:

 <%=nested_form_for (@expense) do |f|％＞<div class="form-group"><%= f.label :state %><br/><%= f.select :state, Expense.states, :include_blank =>假，类:表单控件"%>

<%= f.fields_for :comments, @expense.comments.build 做 |comment|％＞<div class="form-group"><%= comment.label :comment%><%= comment.text_area :comment, class: "form-control" %>

<%= comment.hidden_​​field :commenter %><%结束%><%= f.submit "Submit", class: "btn btn-primary" %><%结束%>

@comment.commenter = current_user 不会将当前用户 ID 添加到数据库中.我应该将它包含在费用控制器的某个地方吗?

解决方案

您必须添加:

@comment.commenter = current_user

低于 if 语句.像这样:

def 创建@article = Expense.find(params[:expense_id])如果@comment = @expense.comments.create(comment_params)@comment.commenter = [e-mail]_ added(@expense).deliver重定向到费用路径结尾结尾

然后再次保存评论.在您当前的代码中，您通过执行以下操作使用新创建的对象覆盖 @comment 对象:

@comment = @expense.comments.create(comment_params)

但是您还没有在该新对象上的任何地方设置 commenter.

I'm trying to build a small expense tracking app using Rails 4.1. Using devise for authorization. Expense and it's nested attribute, comments belong to a user. The associations are set up in the model and expenses are getting associated with the user. Here's the Expense controller:

class ExpensesController < ApplicationController
    def new
        @expense = Expense.new
        @item = @expense.items.build
        #@comment = @expense.comments.build
    end

    def index
        @expenses = Expense.all
        #@items = Item.where(:expense_id => @expense.id)
    end

    def show
        @expense = Expense.find(params[:id])
        @items = Item.where(:expense_id => @expense.id)
    end

    def create
        @expense = current_user.expenses.new(expense_params)
        respond_to do |format|
            if @expense.save
                ExpenseMailer.expense_submission(@expense).deliver
                format.html { redirect_to @expense, notice: 'Expense Report Submitted.' }
                format.json { render :show, status: :created, location: @expense }
            else
                format.html { render :new }
                format.json { render json: @expense.errors, status: :unprocessable_entity }
            end
        end
    end

    def edit
        @expense = Expense.find(params[:id])
    end

    def update
        @expense = Expense.find(params[:id])
        #@comment = @expense.comments.build
        if @expense.update(expense_params)
            #if @comment.save
                #ExpenseMailer.comments_added(@expense).deliver
                flash[:notice] = "Expense Report Updated"
                redirect_to expenses_path
            #else
            #   flash[:notice] = "Expense Report Updated"
                #redirect_to expenses_path
            ##end
        else
            render 'edit'
        end
    end

The form from where the comment attributes are built looks like:

    <%= nested_form_for (@expense) do |f| %>
      <div class="form-group">
        <%= f.label :state %><br />
        <%= f.select :state, Expense.states, :include_blank => false, class: "form-control" %>
       </div>
       <%= f.fields_for :comments, @expense.comments.build do |comment| %>
        <div class="form-group">
          <%= comment.label :comment%>
          <%= comment.text_area :comment, class: "form-control" %>
        </div>
        <%= comment.hidden_field :commenter %>
      <% end %>
        <%= f.submit "Submit", class: "btn btn-primary" %>
    <% end %>
  </div>
</div>

The @comment.commenter = current_user isn't adding the current user id to the database. Should I include it in the expense controller somewhere?

解决方案

You have to add:

@comment.commenter = current_user

below that if statement. Like this:

def create
  @article = Expense.find(params[:expense_id])

  if @comment = @expense.comments.create(comment_params)
    @comment.commenter = current_user
    @comment.save

    ExpenseMailer.comments_added(@expense).deliver
    redirect_to expenses_path
  end
end

And then save the comment again. In your current code you're overwriting the @comment object with the newly created object by doing:

@comment = @expense.comments.create(comment_params)

but you haven't set the commenter on that new object anywhere yet.

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