[英]Ruby on Rails paperclip multiple upload with nested attributes
我想知道是否有人可以帮助我进行文件上传!
我正在尝试使用回形针上传多个图像并具有嵌套属性。
class Trip < ActiveRecord::Base
has_many :trip_images, :dependent => :destroy
end
class TripImage < ActiveRecord::Base
belongs_to :trip
has_attached_file :photo, :styles => { :large => "800x800>", :medium => "500x500>", :thumb => "150x150#" }, :default_url => "/images/:style/missing.png"
validates_attachment_content_type :photo, content_type: /\Aimage\/.*\Z/
end
def create
@trip = Trip.new(trip_params)
respond_to do |format|
if @trip.save
format.html { redirect_to @trip, notice: 'Trip was successfully created.' }
format.json { render :show, status: :created, location: @trip }
else
format.html { render :new }
format.json { render json: @trip.errors, status: :unprocessable_entity }
end
end
end
def trip_params
params.require(:trip).permit(
:user_id,
trip_images_attributes: [:id, :photo])
end
<%= simple_form_for @trip, html: { multipart: true } do |f| %>
<%= f.simple_fields_for :trip_images do |p| %>
<%= p.file_field :photo, as: :file, multiple: true %>
<% end%>
<%= f.button :submit %>
<% end %>
如何在旅行图像数据库中保存多个图像? 当我提交表单时,什么都没有保存到数据库中。
将:trip_id
添加到trip_images_attributes
:
def trip_params
params.require(:trip).permit(
:user_id,
trip_images_attributes: [:trip_id, :id, :photo]) # :_destroy
end
如果您打算删除照片,也可以添加:_destroy
。
您还缺少的是将accepts_nested_attributes_for :trip_images
添加到accepts_nested_attributes_for :trip_images
到Trip
模型中。
将表单更改为以下形式:
= f.simple_fields_for :trip_images do |tp|
= render 'trip_photos_fields', f: photo
.links
%br= link_to_add_association 'Add another photo', f
和_trip_photos_fields.html.haml
部分:
- unless f.object.new_record?
%br= link_to_remove_association "Delete photo", f
= link_to image_tag(f.object.photo.url(:medium)), f.object.photo.url, target: '_blank'
- if f.object.new_record?
= f.file_field :photo, as: :file
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