我试图使用paperclip gem为我的联系人模型添加附件。看起来我可以添加附件 - 我可以选择文件没有问题。但是,当我创建联系人时,附件不会保存。我知道这是因为我可以在rails控制台中看到document_id是'nil'。
在用于创建新联系人的_form.html.erb中,我有:
<%= simple_form_for(@contact, html: {class: "form-inline well", multipart: true}, role: "form") do |f| %>
<% if @contact.errors.any? %>
<div id="error_explanation">
<h2><%= pluralize(@contact.errors.count, "error") %> prohibited this contact from being saved:</h2>
<ul>
<% @contact.errors.full_messages.each do |msg| %>
<li><%= msg %></li>
<% end %>
</ul>
</div>
<% end %>
<div class="form-group">
<%= f.input :name %>
<%= f.input :category %>
<%= f.input :area %>
<%= f.input :phone %>
<%= f.input :website %>
<%= f.input :email %>
<%= f.fields_for :document do |document_fields| %>
<%= document_fields.input :attachment, as: :file %>
<% end %>
<%= f.button :submit, class: "btn-success" %>
</div>
<% end %>
我的数据库迁移是:
class CreateDocuments < ActiveRecord::Migration
def change
create_table :documents do |t|
t.integer :user_id
t.timestamps
end
add_index :documents, :user_id
add_attachment :documents, :add_attachment
add_column :contacts, :document_id, :integer
end
end
我的document.rb模型是:
class Document < ActiveRecord::Base
has_attached_file :attachment, :styles => { :medium => "300x300>", :thumb => "100x100>" }, :default_url => "/images/:style/missing.png"
validates_attachment_content_type :attachment, :content_type => /\Aimage\/.*\Z/
end
和contact.rb是:
class Contact < ActiveRecord::Base
belongs_to :user
belongs_to :document
accepts_nested_attributes_for :document
validates :name, presence: true,
length: { minimum: 2}
validates :user_id, presence: true
end
我在contacts_controller.rb中的行为是:
def create
@contact = current_user.contacts.new(contact_params)
respond_to do |format|
if @contact.save
format.html { redirect_to @contact, notice: 'Contact was successfully created.' }
format.json { render action: 'show', status: :created, location: @contact }
else
format.html { render action: 'new' }
format.json { render json: @contact.errors, status: :unprocessable_entity }
end
end
end
def contact_params
params.require(:contact).permit(:name, :email, :category, :area, :organisation, :website, :phone, :user_id, document_attributes: [:id, :attachment])
end
# PATCH/PUT /contacts/1
# PATCH/PUT /contacts/1.json
def update
@contact = current_user.contacts.find(params[:id])
if params[:contact] && params[:contact].has_key?(:user_id)
params[:contact].delete(:user_id)
end
respond_to do |format|
if @contact.update((contact_params))
format.html { redirect_to @contact, notice: 'Contact was successfully updated.' }
format.json { head :no_content }
else
format.html { render action: 'edit' }
format.json { render json: @contact.errors, status: :unprocessable_entity }
end
end
end
当我尝试使用附件创建新联系人时,这是我的heroku日志:
2014-03-10T23:41:49.594786 + 00:00 app [web.1]:参数: { “UTF8”=&gt; “中✓”, “authenticity_token”=&gt; “中FGitLGkHzfw15yksCusGDvwdb // CgMyOMFh4SS4l63Y =”, “contact”=&gt; {“name”=&gt;“Oliver OT”,“category”=&gt;“OT”,“area”=&gt;“Rockdale”, “phone”=&gt;“”,“网站”=&gt;“”,“电子邮件”=&gt;“”, “document_attributes”=&GT; { “附件”=&GT;#, @ original_filename =“Screen Shot 2014-03-03 at 9.24.40 pm.png”, @ content_type =“image / png”,@ headers =“Content-Disposition:form-data; 名= \ “接触[document_attributes] [附件] \”;文件名= \“屏幕 拍摄2014-03-03 at 9.24.40 pm.png \“\ r \ nConContent-Type: image / png \ r \ n“&gt;}},”commit“=&gt;”创建联系人“} 2014-03-10T23:41:49.594786 + 00:00 app [web.1]:参数: { “UTF8”=&gt; “中✓”, “authenticity_token”=&gt; “中FGitLGkHzfw15yksCusGDvwdb // CgMyOMFh4SS4l63Y =”, “contact”=&gt; {“name”=&gt;“Oliver OT”,“category”=&gt;“OT”,“area”=&gt;“Rockdale”, “phone”=&gt;“”,“网站”=&gt;“”,“电子邮件”=&gt;“”, “document_attributes”=&GT; { “附件”=&GT;#, @ original_filename =“Screen Shot 2014-03-03 at 9.24.40 pm.png”, @ content_type =“image / png”,@ headers =“Content-Disposition:form-data; 名= \ “接触[document_attributes] [附件] \”;文件名= \“屏幕 拍摄2014-03-03 at 9.24.40 pm.png \“\ r \ nConContent-Type: image / png \ r \ n“&gt;}},”commit“=&gt;”创建联系人“}
我不确定如何正确保存附件?
答案 0 :(得分:0)
将contact_params
方法移到更新操作之外,以便create操作可以访问它并将其更改为以下代码。
def contact_params
params.require(:contact).permit(:name, :email, :category, :area, :organisation, :website, :phone, :user_id, document_attributes: [:id, :attachment])
end
上面的代码允许id
的{{1}}和attachment
参数。
答案 1 :(得分:0)
您的迁移存在问题:
add_attachment :documents, :add_attachment
这意味着您的数据库表的附件列将改为add_attachment
,从而导致Paperclip无法正常工作
您需要使用以下迁移更改数据库中的列:
class Migration < ActiveRecord::Migration
def change
rename_column :documents, :add_attachment_file_name, :attachment_file_name
rename_column :documents, :add_attachment_content_type, :attachment_content_type
rename_column :documents, :add_attachment_file_size, :attachment_file_size
rename_column :documents, :add_attachment_updated_at, :attachment_updated_at
end
end