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Rails 4 multi-user file attachments using Paperclip

I know that there are several posts in Stackoverflow and some guides on this. However, none of them can solve my problem, and most of them are also outdated.

I am trying to add multiple images to a project using the paperclip gem in Rails 4. When I try to load it, I see an asset attached to the parameters.

They don't seem to be added to project_paramns, though ..

Hope someone can help me here.

This is my project_controller

class ProjectsController < ApplicationController

  before_filter :find_project, only: [:show, :edit, :update, :destroy]

  def index
   @projects = Project.all
  end

  def show
  end

  def new
    @project = Project.new
  end

  def create
    @project = Project.new(project_params)
    @project.save

    redirect_to project_path(@project)
  end

  def edit
  end

  def update
    @project.update(project_params)

    redirect_to project_path(@project)
  end

  def destroy
    @project.destroy

    redirect_to projects_path
  end

  protected

    def project_params
      params.require(:project).permit(:name, :description, :asset)
    end

    def find_project
      @project = Project.find(params[:id])
    end
end

My project model

class Project < ActiveRecord::Base
  has_many :assets, :dependent => :destroy

  validates_associated :assets
  validates_presence_of :name, :on => :create, :update => "can't be blank"
  validates_presence_of :description, :on => :create, :update => "can't be blank"

  accepts_nested_attributes_for :assets
end

My asset model

class Asset < ActiveRecord::Base
    belongs_to :project

  # Paperclip
  has_attached_file :image,
    :styles => {
      :thumb=> "100x100#",
      :small  => "150x150>",
      :medium => "300x300>",
      :large =>   "400x400>" }
  validates_attachment :image, content_type: { content_type: ["image/jpg", "image/jpeg",     "image/png", "image/gif"] }
end

And my form is partial (sorry in HAML)

= simple_form_for @project do |f|
  %ul
    - @project.errors.full_messages.each do |error|
      %li= error
  .row
    .small-1.columns    
      = f.label :name, :class => "left inline"
    .small-11.columns
      = f.input_field :name
  .row
    .small-1.columns
      = f.label :description, :class => "left inline"
    .small-11.columns 
      = f.input_field :description, as: :text
  .row
    = f.simple_fields_for :asset do |a|
      .small-1.columns
        = a.label :image, :class => "left inline"
      .small-11.columns
        = file_field_tag :image, multiple: true,
  .row
    .small-9.small-offset-1.columns
      = f.submit nil ,:class => "button [radius round]"

Request Parameters

{"utf8"=>"✓", "_method"=>"patch", "authenticity_token"=>"4iK1kUNvKvoJVOKoivz/pcLAe6LY0cUJikQioxa8BIs=", "project"=>{"name"=>"adf", "description"=>"adf", "asset"=>{"image"=>[#<ActionDispatch::Http::UploadedFile:0x007fb808357d80 @tempfile=#<Tempfile:/var/folders/v_/98sxm8bn24qbqj_jmj40fv400000gn/T/RackMultipart20140607-34739-dvlzt7>, @original_filename="enabling-gzip-compression.jpg", @content_type="image/jpeg", @headers="Content-Disposition: form-data; name=\"project[asset][image][]\"; filename=\"enabling-gzip-compression.jpg\"\r\nContent-Type: image/jpeg\r\n">, #<ActionDispatch::Http::UploadedFile:0x007fb808357d58 @tempfile=#<Tempfile:/var/folders/v_/98sxm8bn24qbqj_jmj40fv400000gn/T/RackMultipart20140607-34739-lwkioi>, @original_filename="minimize_http_requests.png", @content_type="image/png", @headers="Content-Disposition: form-data; name=\"project[asset][image][]\"; filename=\"minimize_http_requests.png\"\r\nContent-Type: image/png\r\n">]}}, "commit"=>"Update Project", "action"=>"update", "controller"=>"projects", "id"=>"11"}

Now I also got an error in my terminal:

Unpermitted parameters: asset

Edit:

@pavan @kiri thorat -, project_params, , :

{"name"=>"Test", "description"=>"Test", "assets_attributes"=>{"0"=>{}}}

- , ?

@kirithorat .

{"utf8"=>"✓", "_method"=>"patch", "authenticity_token"=>"4iK1kUNvKvoJVOKoivz/pcLAe6LY0cUJikQioxa8BIs=", "project"=>{"name"=>"Test", "description"=>"Test", "assets_attributes"=>{"0"=>{"image"=>#<ActionDispatch::Http::UploadedFile:0x007fcd383c9a08 @tempfile=#<Tempfile:/var/folders/v_/98sxm8bn24qbqj_jmj40fv400000gn/T/RackMultipart20140610-36517-7ek1oq>, @original_filename="enabling-gzip-compression.jpg", @content_type="image/jpeg", @headers="Content-Disposition: form-data; name=\"project[assets_attributes][0][image]\"; filename=\"enabling-gzip-compression.jpg\"\r\nContent-Type: image/jpeg\r\n">}}}, "commit"=>"Update Project", "action"=>"update", "controller"=>"projects", "id"=>"13"}

.

@Valikiliy

{"utf8"=>"✓", "_method"=>"patch", "authenticity_token"=>"4iK1kUNvKvoJVOKoivz/pcLAe6LY0cUJikQioxa8BIs=", "project"=>{"name"=>"Test", "description"=>"Test", "image"=>#<ActionDispatch::Http::UploadedFile:0x007fcd3a08d0b8 @tempfile=#<Tempfile:/var/folders/v_/98sxm8bn24qbqj_jmj40fv400000gn/T/RackMultipart20140610-36517-rgy95n>, @original_filename="minimize_http_requests.png", @content_type="image/png", @headers="Content-Disposition: form-data; name=\"project[image]\"; filename=\"minimize_http_requests.png\"\r\nContent-Type: image/png\r\n">}, "commit"=>"Update Project", "action"=>"update", "controller"=>"projects", "id"=>"16"}

:

= simple_form_for(@project, :html => { :multipart => true }) do |f|
  %ul
    - @project.errors.full_messages.each do |error|
      %li= error
  .row
    .small-1.columns    
      = f.label :name, :class => "left inline"
    .small-11.columns
      = f.text_field :name
  .row
    .small-1.columns
      = f.label :description, :class => "left inline"
    .small-11.columns 
      = f.text_area :description
  .row
    = f.simple_fields_for :assets do |a|
      .small-1.columns
        = a.label :image, :class => "left inline"
      .small-11.columns
        - if a.object.new_record?
          = a.input :image, as: :file
        - else
          = image_tag a.object.image.url(:thumb)
          = a.input_field '_destroy', as: :boolean
  .row
    .small-9.small-offset-1.columns
      = f.submit nil ,:class => "button [radius round]"


def project_params
  params.require(:project).permit(:name, :description, images: [], assets_attributes: [:_destroy, :id, :image])
end

def find_project
  @project = Project.find(params[:id])
  @project.assets.build if %w[new edit].include?(action_name) 
end

:

class Project < ActiveRecord::Base
  has_many :assets, :dependent => :destroy

  validates_presence_of :name, :on => :create, :update => "can't be blank"
  validates_presence_of :description, :on => :create, :update => "can't be blank"

  accepts_nested_attributes_for :assets, :reject_if => lambda { |a| a[:content].blank? }, :allow_destroy => true
end
+4
3

, multiple: true, , - . .

, : :

def new
  @project = Project.new
  3.times{ @project.assets.build } 
end

def edit
  3.times{ @project.assets.build } 
end


.permit(..., assets_attributes: [ :_destroy, :id, :image ])

:

= f.simple_fields_for :assets do |a|
  .small-1.columns
    = a.label :image, :class => "left inline"
    - if a.object.new_record?
      .small-11.columns
        = a.file_field :image
    - else
      .small-11.columns
        = image_tag a.object.image.url(:thumb)
        = a.input_field '_destroy', as: :boolean

:

# view
a.file_field :image, multiple: true

# controller
.permit(..., assets_attributes: [ :_destroy, :id, image: [] ])

, Asset , .

, , :

: images=

def images=(files = [])
  assets.create(image: f)
end

: images: [] assets_attributes

.permit(..., images: [], assets_attributes: [ :_destroy, :id ])

view: fields_for

  .row
    .small-1.columns
      =f.file_field :images, multiple: true
  .row
    = f.simple_fields_for :assets do |a|
      .small-1.columns
        = a.label :image, :class => "left inline"
....
+17

project_params

def project_params
  params.require(:project).permit(:name, :description, assets_attributes: [:image])
end

, protected? , private.

+3

1- Project Asset, ..

has_many

simple_fields_for

= f.simple_fields_for :assets do |a|

assets NOT Asset

simple_fields_for Asset, params Asset params , assets_attributes , Unpermitted parameters: asset.

params . , @Pavan , , assets_attributes .

project_params, :

def project_params
  params.require(:project).permit(:name, :description, assets_attributes: [:image])
end

assets_attributes assets

UPDATE

@project.assets.build new edit ProjectsController, new edit. , :id assets_attributes project_params, :

  params.require(:project).permit(:name, :description, assets_attributes: [:id, :image])

, form partial,

  • , :html => {:multipart => true} .

    = simple_form_for @project do |f|


    = simple_form_for @project, :html => {:multipart => true} do |f|

  • The project has_many property, and each record Assetwill have only one image, so delete it multiple: true. In addition, since you are using simple_form, it is recommended that you use a helper method simple_formto download the file.

    Edit

    = file_field_tag :image, multiple: true,

    For

    = a.input :image, as: :file
+3
source

Source: https://habr.com/ru/post/1543688/

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