我正在处理我正在处理的rails应用程序的轻微问题。我正在使用Carrierwave，Nested_form，Simple_form和Jquery-file-upload宝石。
除数据外，大部分内容都运行良好。
我有两个模型，一个项目模型和一个附件模型。
提交项目表单时，所有文件都按原样上传，附件模型中的记录将按原样创建（每个文件一个）。但是对于项目模型，也会为每个文件创建一条记录。
我似乎无法弄清楚（在单个表单上，单个提交）如何只获得项目的一个记录和附件的多个记录。
任何帮助将不胜感激，我在下面概述了我的代码。如果可能的话，我想避免两个步骤，但如果有人能指出我正确的方向，那将有所帮助。
项目模型
class Project < ActiveRecord::Base
has_many :attachments, :dependent => :destroy
accepts_nested_attributes_for :attachments, :allow_destroy => true
def generate_token
self.token = loop do
random_token = SecureRandom.urlsafe_base64
break random_token unless Project.where(token: random_token).exists?
end
end
end
附件模型
class Attachment < ActiveRecord::Base
belongs_to :project, :polymorphic => true
include Rails.application.routes.url_helpers
mount_uploader :file, AttachmentUploader
def to_jq_upload
{
"name" => read_attribute(file),
"url" => file.url,
"size" => file.size,
"delete_url" => attachment_path(:id => id),
"delete_type" => "DELETE"
}
end
end
项目控制器
class ProjectsController < ApplicationController
def index
@projects = Project.all
respond_to do |format|
format.html
format.json { render json: @projects }
end
end
def new
@project = Project.new
@project.token = @project.generate_token
@attachments = @project.attachments.build
end
def create
@project = Project.new(project_params)
respond_to do |format|
if @project.save
format.html { redirect_to projects_url, notice: 'Project was successfully created.' }
format.json { render json: @project, status: :created, location: @project }
else
format.html {}
format.json {}
end
end
end
def destroy
@project = Project.find(params[:id])
@project.destroy
respond_to do |format|
format.html { redirect_to projects_url }
format.json { head :no_content }
end
end
private
def project_params
params.require(:project).permit(:name, :token, :number_of_pages, :number_of_copies, :flat_page_size, :trim_page_size, :purchase_order_number, :preferred_delivery_date, :delivery_method, :delivery_instructions, :project_instructions, attachments_attributes: [:id, :attachment, :name, :filename, :file, :project_token, :branch])
end
end
附件控制器
class AttachmentsController < ApplicationController
before_filter :the_project
def index
@attachments = Attachment.where("project_id = ?", the_project)
render :json => @attachments.collect { |p| p.to_jq_upload }.to_json
end
def create
@project = Project.find(params[:project_id])
@attachment = Attachment.new(attachment_params)
if @attachment.save
respond_to do |format|
format.html { render :json => [@attachment.to_jq_upload].to_json, :content_type => 'text/html', :layout => false }
format.json { render :json => {files: [@attachment.to_jq_upload]}.to_json }
end
else
render :json => [{ :error => "custom_failure "}], :status => 304
end
end
def destroy
@attachment = Attachment.find(params[:id])
@attachment.destroy
render :json => true
end
private
def the_project
@project = Project.find(params["project_id"])
end
end
新项目表单（app / views / projects / new.html.erb）
<h2>New Project</h2>
<br />
<%= simple_nested_form_for @project, :defaults => { :wrapper_html => {:class => 'form-group'}, :input_html => { :class => 'form-control' } }, :html => { :multipart => true, :id => "fileupload", :class => 'horizontal-form', :role => "form" } do |f| %>
<div class="row">
<div class="col-lg-12">
<%= f.input :name, :label => "Project Name / Description", :class => 'col-lg-12' %>
<%= f.hidden_field :token %>
</div>
</div>
<div class="row">
<div class="col-lg-6">
<%= f.input :number_of_pages %>
<%= f.input :flat_page_size %>
<%= f.input :purchase_order_number %>
</div>
<div class="col-lg-6">
<%= f.input :number_of_copies %>
<%= f.input :trim_page_size, :label => 'Finished Size <em><small>(If Different from Flat Page Size)</small></em>' %>
<%= f.input :preferred_delivery_date, :as => :text %>
</div>
</div>
<div class="row">
<div class="col-lg-6">
<%= f.input :delivery_method %>
</div>
<div class="col-lg-6">
<%= f.input :project_instructions %>
</div>
</div>
<div class="row">
<div class="col-lg-6">
<select id="branches">
<option>Calgary Downtown</option>
<option>Calgary South</option>
<option>Edmonton</option>
<option>Kelowna</option>
</select>
</div>
</div>
<br />
<div class="row fileupload-buttonbar">
<div class="col-lg-7">
<%= fields_for :attachments do |a| %>
<span class="btn btn-success fileinput-button">
<i class="glyphicon glyphicon-plus"></i>
<span>Add files...</span>
<%= a.file_field :file, :name => 'project[attachments_attributes][0][file]', :multiple => true %>
</span>
<button type="submit" class="btn btn-primary start">
<i class="glyphicon glyphicon-upload"></i>
<span>Start Upload</span>
</button>
<button type="reset" class="btn btn-warning cancel">
<i class="glyphicon glyphicon-ban-circle"></i>
<span>Cancel Upload</span>
</button>
<button type="button" class="btn btn-danger delete">
<i class="glyphicon glyphicon-trash"></i>
<span>Delete Upload</span>
</button>
<%= a.hidden_field :branch, :value => "Calgary Downtown" %>
<%= a.hidden_field :project_token, :value => @project.token %>
<% end %>
</div>
<div class="col-lg-5">
<div class="progress progress-success progress-striped active fade">
<div class="bar" style="width:0%"></div>
</div>
</div>
</div>
<div class="row fileupload-loading"></div>
<div class="row">
<table class="table table-striped">
<tbody class="files" data-toggle="modal-gallery" data-target="#modal-gallery">
</tbody>
</table>
</div>
<% end %>
<script>
var fileUploadErrors = {
maxFileSize: 'File is too big',
minFileSize: 'File is too small',
acceptFileTypes: 'Filetype not allowed',
maxNumberOfFiles: 'Max number of files exceeded',
uploadedBytes: 'Uploaded bytes exceed file size',
emptyResult: 'Empty file upload result'
};
</script>
<!-- The template to display files available for upload -->
<script id="template-upload" type="text/x-tmpl">
{% for (var i=0, file; file=o.files[i]; i++) { %}
<tr class="template-upload fade">
<td class="preview"><span class="fade"></span></td>
<td class="name"><span>{%=file.name%}</span></td>
<td class="size"><span>{%=o.formatFileSize(file.size)%}</span></td>
{% if (file.error) { %}
<td class="error" colspan="2"><span class="label label-important">{%=locale.fileupload.error%}</span> {%=locale.fileupload.errors[file.error] || file.error%}</td>
{% } else if (o.files.valid && !i) { %}
<td>
<div class="progress progress-success progress-striped active"><div class="bar" style="width:0%;"></div></div>
</td>
<td class="start">{% if (!o.options.autoUpload) { %}
<button class="btn btn-primary">
<i class="icon-upload icon-white"></i>
<span>{%=locale.fileupload.start%}</span>
</button>
{% } %}</td>
{% } else { %}
<td colspan="2"></td>
{% } %}
<td class="cancel">{% if (!i) { %}
<button class="btn btn-warning">
<i class="icon-ban-circle icon-white"></i>
<span>{%=locale.fileupload.cancel%}</span>
</button>
{% } %}</td>
</tr>
{% } %}
</script>
<!-- The template to display files available for download -->
<script id="template-download" type="text/x-tmpl">
{% for (var i=0, file; file=o.files[i]; i++) { %}
<tr class="template-download fade">
{% if (file.error) { %}
<td></td>
<td class="name"><span>{%=file.name%}</span></td>
<td class="size"><span>{%=o.formatFileSize(file.size)%}</span></td>
<td class="error" colspan="2"><span class="label label-important">{%=locale.fileupload.error%}</span> {%=locale.fileupload.errors[file.error] || file.error%}</td>
{% } else { %}
<td class="preview">{% if (file.thumbnail_url) { %}
<a href="{%=file.url%}" title="{%=file.name%}" rel="gallery" download="{%=file.name%}"><img src="{%=file.thumbnail_url%}"></a>
{% } %}</td>
<td class="name">
<a href="{%=file.url%}" title="{%=file.name%}" rel="{%=file.thumbnail_url&&'gallery'%}" download="{%=file.name%}">{%=file.name%}</a>
</td>
<td class="size"><span>{%=o.formatFileSize(file.size)%}</span></td>
<td colspan="2"></td>
{% } %}
<td class="delete">
<button class="btn btn-danger" data-type="{%=file.delete_type%}" data-url="{%=file.delete_url%}">
<i class="icon-trash icon-white"></i>
<span>{%=locale.fileupload.destroy%}</span>
</button>
<input type="checkbox" name="delete" value="1">
</td>
</tr>
{% } %}
</script>
<script type="text/javascript" charset="utf-8">
$(function () {
var num_added = 0;
var added = 0;
var all_data = {};
$('#branches').change(function() {
var test = $("option:selected",this).text();
$('#project_attachments_attributes_0_branch').val(test);
});
// Initialize the jQuery File Upload widget:
$('#fileupload').fileupload({
sequentialUploads: true,
});
});
</script>
答案 0 :(得分：0)
我正在或多或少地处理完全相同的问题（我的涉及stock_items - 不是项目，但无论如何......）
一个问题是#fileupload.fileupload初始化整个表单 - 这将发布你不想要的项目
我还没有解决这个问题 - 但不知怎的'我们'必须让父形式不 POST
答案 1 :(得分：-1)
我认为您需要包含“父母”的索引。输入中的实例，在本例中为Project。所以：
<%= a.file_field :file, :name => 'project[*index*][attachments_attributes][0][file]', :multiple => true %>