Ruby on Rails Paperclip gem nested form problem with retention

[inna]

Good day. I'm doing a little project, I'm faced with the problem of keeping pictures.

My models:

class Arendakvartir < ActiveRecord::Base
has_many :attachments, dependent: :destroy

accepts_nested_attributes_for :attachments

validates_associated :attachments
end
class Attachment < ActiveRecord::Base
belongs_to :arendakvartir
has_attached_file :image,

:path => ":rails_root/public/images/:id/:filename",

:url  => "/images/:id/:filename",

styles: { medium: "300x300>", thumb: "100x100>" }
validates_attachment_content_type :image, :content_type => ["image/jpg", "image/jpeg", "image/png", "image/gif"]

validates_attachment :image, presence: true

validates_attachment_size :image, :less_than => 5.megabytes
end

Controller:

class ArendakvartirsController < ApplicationController

def new

@arenda = Arendakvartir.new()

end
def show
end
def create
binding.pry
@arenda = Arendakvartir.new()
@arenda.attachments.build()

if @arenda.save(arenda_params)
  respond_to do |format|
      flash[:positive] = "Объект сохранен успешно"
      format.html { redirect_to new_arendakvartir_path }
  end
else
  respond_to do |format|
      flash[:negative] =  "Объект не был сохранен успешно"
      format.html { render action: 'new'}
 end

end

end

private
def arenda_params
params.require(:arendakvartir).permit(:attachments_attributes =[:image]

)

end
end

Proposal form:

<%= nested_form_for(@arenda, :html =>  { :class => "ui form", :id => "create_new_arenda", :multipart => true }) do |t| %>

    &lt;%= render 'shared/errors', :obj =&gt; @arenda  %&gt;

      &lt;%= t.fields_for :attachments do |a| %&gt;
          &lt;%= a.file_field :image, :name =&gt; 'arendakvartir[attachments_attributes][][image]' %&gt;
      &lt;% end %&gt;

<%= submit_tag("Добавить объект", :class => "ui huge olive button") %>
<% end %>

Ultimately, I'm getting a mistake in validating the Attachment model.

In shape there are errors:

Attachments image can't be blank
Attachments is invalid

Tell me where I'm wrong. My gemfile:

source 'https://rubygems.org'

gem 'pg'
Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
gem 'rails', '4.2.3'
Use sqlite3 as the database for Active Record
gem 'sqlite3'
Use SCSS for stylesheets
gem 'sass-rails', '~> 5.0'
Use Uglifier as compressor for JavaScript assets
gem 'uglifier', '>= 1.3.0'
Use CoffeeScript for .coffee assets and views
gem 'coffee-rails', '~> 4.1.0'
See https://github.com/rails/execjs#readme for more supported runtimes
gem 'therubyracer', platforms: :ruby
Use jquery as the JavaScript library
gem 'jquery-rails'
Turbolinks makes following links in your web application faster. Read more: https://github.com/rails/turbolinks
gem 'turbolinks'
Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
gem 'jbuilder', '~> 2.0'
bundle exec rake doc:rails generates the API under doc/api.
gem 'sdoc', '~> 0.4.0', group: :doc

gem 'paperclip', '~> 4.3'

#gem 'rmagick', '~> 2.15', '>= 2.15.4'

#Use ActiveModel has_secure_password

gem 'bcrypt', '~> 3.1.7'

gem "wysiwyg-rails"

gem "font-awesome-rails"

gem "nested_form"

gem 'semantic-ui-sass', github: 'doabit/semantic-ui-sass'
Use Unicorn as the app server
gem 'unicorn'
Use Capistrano for deployment
gem 'capistrano-rails', group: :development
group :development, :test do
Call 'byebug' anywhere in the code to stop execution and get a debugger console
gem 'byebug'
gem 'pry'
Access an IRB console on exception pages or by using <%= console %> in views
gem 'web-console', '~> 2.0'
Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
gem 'spring'

end

[Pearlaqua]

Hashmap with attributes makes sense in the following methods. model:

• new (sighs)build for association)
• create
• assign_attributes
• update_attributes (+ alas) update)

Not at all. savewhich is responsible solely for recording the current status of the OBD facility.