我希望将多张图片上传到“位置”模型。我称图像模型为“资产”。一个地点有多个资产。我还使用回形针来处理上传内容,并使用nested_form来选择多个资产。
奇怪的是,位置哈希看起来正确地传递了变量,但是资产模型似乎没有选择它们。任何帮助将是巨大的!
位置模型
class Location < ActiveRecord::Base
has_many :location_post
has_many :posts, :through => :location_post
has_many :assets, dependent: :destroy
attr_accessor :asset, :assets_attributes
accepts_nested_attributes_for :assets, :allow_destroy => true
end
资产模型
class Asset < ActiveRecord::Base
belongs_to :location
has_attached_file :asset,
:styles => {
:blurred => "600x300^",:large => "600x600>", :medium => "250x250^" , :thumb => "100x100^"},
#:source_file_options => {:all => '-rotate "-90>"'},
:convert_options => {
:all => '-auto-orient', :blurred => "-blur 0x6 +repage -resize 600x300^"
},
:storage => :s3,
:s3_credentials => "#{Rails.root}/config/s3.yml",
:bucket => "[bucketname]",
:path => "/:style/:id/:filename"
validates_attachment_content_type :asset, :content_type => ["image/jpg", "image/jpeg", "image/png", "image/gif"]
end
位置控制器
class LocationsController < ApplicationController
...
def new
@location = Location.new
@location.assets.build
@georesult = Geocoder.search(params[:query])
end
def create
@location = Location.find_or_create_by(name: location_params[:name])
respond_to do |format|
if @location.save
format.html { redirect_to @location, notice: ' <borat voice> Great success! </borat voice>' }
format.json { render :show, status: :created, location: @location }
else
format.html { render :new }
format.json { render json: @location.errors, status: :unprocessable_entity }
end
end
end
# PATCH/PUT /locations/1
# PATCH/PUT /locations/1.json
def update
respond_to do |format|
if @location.update(location_params)
format.html { redirect_to @location, notice: 'Location was successfully updated.' }
format.json { render :show, status: :ok, location: @location }
else
format.html { render :edit }
format.json { render json: @location.errors, status: :unprocessable_entity }
end
end
end
...
private
# Use callbacks to share common setup or constraints between actions.
def location_params
params[:location].permit(:name, :notes, :longitude, :country, :latitude, :query, assets_attributes: [ :asset, :asset_content_type, :asset_file_name, :tempfile, :asset_file_size, :asset_updated_at, :_destroy])
end
end
表格检视
<%= nested_form_for(@location, :html=> {:multipart => true}) do |f| %>
...
<%= f.fields_for :assets do |a| %>
<%= a.file_field :asset %>
<%= a.link_to_remove "Remove this image" %>
<% end %>
<%= f.link_to_add "Add an image", :assets %>
...
<%= f.submit "Submit", :class => "btn btn-success submit_location" %>
<% end %>
日志输出
Processing by LocationsController#update as HTML
Parameters: {"utf8"=>"✓", "authenticity_token"=>"n4spoLjq4B3sZSJjqsGFRVjkseOwGgvquAHATBRG1Nk=", "location"=>{"name"=>"York", "notes"=>"", "lat
itude"=>"53.96230079999999", "longitude"=>"-1.0818844", "country"=>"", "assets_attributes"=>{"0"=>{"asset"=>#<ActionDispatch::Http::UploadedFile
:0x007ff739b7bb68 @tempfile=#<Tempfile:/var/folders/sc/gps8hkgj7yg31j81gpnfg9h00000gn/T/RackMultipart20140706-43312-kdpghs>, @original_filename=
"78509.max1024.jpg", @content_type="image/jpeg", @headers="Content-Disposition: form-data; name=\"location[assets_attributes][0][asset]\"; filen
ame=\"78509.max1024.jpg\"\r\nContent-Type: image/jpeg\r\n">, "_destroy"=>"false"}}}, "commit"=>"Submit", "id"=>"240"}
User Load (0.6ms) SELECT "users".* FROM "users" WHERE "users"."id" = 1 ORDER BY "users"."id" ASC LIMIT 1
Location Load (0.4ms) SELECT "locations".* FROM "locations" WHERE "locations"."id" = $1 LIMIT 1 [["id", 240]]
(0.2ms) BEGIN
(0.3ms) COMMIT
Redirected to http://localhost:3000/locations/240
Completed 302 Found in 9ms (ActiveRecord: 1.6ms)
我在您的代码中看到了几个问题:
首先,您需要从Location
模型中删除以下行:
attr_accessor :asset, :assets_attributes
作为其制造asset
和asset_attributes
虚拟属性,这就是为什么它们不保存在数据库中的原因。另外,您不需要模型中的asset
属性,Location
因为模型已经照顾了它Asset
。
然后,location_params
按照@Pavan的建议更新:
def location_params
## Use `require` method
params.require(:location).permit(:name, :notes, :longitude, :country, :latitude, :query, assets_attributes: [ :asset, :asset_content_type, :asset_file_name, :tempfile, :asset_file_size, :asset_updated_at, :_destroy])
end
接下来,create
按如下所示更新操作,以确保位置在名称上是唯一的:
def create
@location = Location.find_by(name: location_params[:name])
unless @location
@location = Location.new(location_params)
end
respond_to do |format|
if @location.save
format.html { redirect_to @location, notice: ' <borat voice> Great success! </borat voice>' }
format.json { render :show, status: :created, location: @location }
else
format.html { render :new }
format.json { render json: @location.errors, status: :unprocessable_entity }
end
end
end
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