Rails如何只下载当前记录点击下载按钮

Question

我是新来的铁轨。我正在开发一个包含添加客户的应用程序。在那里我有下载按钮。当我点击下载按钮时它应该在csv文件中下载当前客户页面。

控制器

def create 
    @customer_detail = CustomerDetail.new(customer_detail_params) 
    @customer_detail.company_profile_id = current_user.company_profile.id 
    respond_to do |format| 
    if @customer_detail.save 
     format.html { redirect_to edit_customer_detail_path(@customer_detail), notice: 'customerDetails was successfully created.' } 
     # format.html { render 'edit', notice: 'customerDetails was successfully created.' } 
    else 
     format.html { render :new } 
    end 
    end 
end 

def index 
    @customer_details = CustomerDetail.all 
end 

def destroy 
end 

def update 
    respond_to do |format| 
    format.html 
    format.csv { render text: @customer_details.to_csv } 
    if @customer_detail.update(customer_detail_params) 
     format.html { redirect_to @customer_detail, notice: 'customer_details was successfully updated.' } 
    else 
     format.html { render :edit } 
    end 
    end 
end 

查看

.fieldset 
    .row 
    .col-sm-3 
     = f.submit "Save", class: "btn btn-primary" 
    .col-sm-3 
     = f.submit "cancel", type: :reset, class: "btn btn-primary" 
    .col-sm-3 
     = link_to "Download", edit_customer_detail(format: "csv"), class: "btn btn-primary" 
    .col-sm-3 
     = link_to("Print", "javascript:print()", class: "btn btn-primary") 

问题是，它从下载的形式的所有记录。我不知道是否要更新或编辑行动。如果我给路径edit_customer_detail而不是customer_details_（路径）它显示模板错误，并单击下载按钮时没有路径匹配错误。有人请帮助我。我是在这里附上输出链接。提前致谢！！

Customer_details.csv

Answer 1

模型

def to_csv 
 
    CSV.generate do |csv| 
 
     csv << self.class.column_names 
 
     csv << self.attributes.values_at(*self.class.column_names) 
 
     end 
 
    end

控制器

def download_csv 
 
    respond_to do |format| 
 
     format.html 
 
     format.csv { render text: @customer_detail.to_csv } 
 
    end 
 
    end

视图

.col-sm-3 
 
       - if @customer_detail.save 
 
       = link_to "Download", download_csv_customer_detail_path(@customer_detail.id, format: "csv"), class: "btn btn-primary"

我已在控制器和改变方法的行动独立的方法和routes.finally得到的回答

Answer 2

在控制器的更新方法，下面一行变化：

format.csv { render text: @customer_details.to_csv } with 
format.csv { render text: @customer_detail.to_csv } 

Answer 3

在application.rb中 添加require 'csv'

更改您的更新功能

def update 
    respond_to do |format| 
    format.html 
    format.csv { render text: @customer_detail.to_csv } 
    if @customer_detail.update(customer_detail_params) 
     format.html { redirect_to @customer_detail, notice: 'customer_details was successfully updated.' } 
    else 
     format.html { render :edit } 
    end 
    end 

你是道琼斯为所有用户下载报告，因为@customer_details = CustomerDetail.all会为所有用户返回数据。