CODEWITHSUNDEEP
ruby-on-railsrubyruby-on-rails-4simple-form
nobody
nobody

Reputation: 8293

simple_form only allow upload when file is present

I am using the simple_form (https://github.com/plataformatec/simple_form) library to do a file upload using Rails 4.2.5. I want to disallow file uploads unless a file is present in the form using simple_form but do not know exactly how to do this. My code is below:

<%= simple_form_for @business, html: { multipart: true } do |f| %>
            <%= f.simple_fields_for :attached_files, AttachedFile.new do |af| %>
            <%= af.input :file, as: :file, label: false %>
          <% end %>
          <%= f.button :submit,
                       'Upload File',
                       class: 'btn btn-mini btn-success hidden',
                       id: 'submit-file-upload' %>
        <% end %>

Upvotes: 3

Views: 6975

Answers (1)

Collin Graves
Collin Graves

Reputation: 2267

Let me know if you're looking for something a little more verbose, but the simplest implementation of this is simply by adding a required field to the input statement: 

<%= simple_form_for @business, html: { multipart: true } do |f| %>
      <%= f.simple_fields_for :attached_files, AttachedFile.new do |af| %>
        <%= af.input :file, as: :file, label: false, required: true %>
      <% end %>
      <%= f.button :submit,
                   'Upload File',
                   class: 'btn btn-mini btn-success hidden',
                   id: 'submit-file-upload' %>
<% end %>

Additionally, you're going to want to make sure you're doing server-side validations, as they're really the only concrete validations (browser validations can always be tampered with)

  def create
    @business = Business.new(business_params)

    unless params[:file].nil?
      if @business.save!
        redirect_to root_path
      else
        render :new
      end 
  end

Lastly, make sure your config file is set to handle browser validations: 

SimpleForm.browser_validations = true

Upvotes: 9

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