How to upload images to folders with CarrierWave?

Itay Taragano

March 07, 2025 04:36 Updated

When using CarrierWave to perform server-side uploads, you can use code like the following:

classPictureUploader < CarrierWave::Uploader::Base      
  include Cloudinary::CarrierWave
  ...

  def public_id
    return "my_folder/" + model.short_name
  end  
end

Alternatively, if you would like to use a random public ID (because that may be default behavior for your uploads), you can use the following for public_id:

return "my_folder/" + Cloudinary::Utils.random_public_id;

If you're using client-side uploads, you can set the folder parameter when building the upload tag:

<%= f.cl_image_upload(:image, :folder => "my_folder") %>

For more information on the CarrierWave integration, please refer to the CarrierWave integration reference.

Comments

6 comments

Nadav Ofir

August 16, 2016 11:30 Edited
Hi, you can use our random_public_id method to generate a random public ID for the upload request, e.g.:
```
  def public_id
    return "my_folder/" + Cloudinary::Utils.random_public_id;
  end  
```
1
Ashrith

March 19, 2019 17:21
Hi Maor Gariv/Itay Taragano,

As updated recently by Itay Taragano, using public_id in the uploader class doesn't update the URL structure.

And URL generated still looks like this: "https://res-3.cloudinary.com/cloud_name/image/upload/pic_08.png"

And my public_id method looks as follows:
def public_id
"uploads/#{model.class.to_s.underscore}/#{mounted_as}/#{model.id}"
end

It still uses the `resource_type` and `type` instead of my model details as mentioned above. And i followed all the steps mentioned.
1
Maicon Sanson Penna

August 15, 2016 20:02 Edited
Do I must define a public_id with server-side? I only wanna create a folder and mantain the default public_id.

Is it possible?
0
Pedro Henrique Knoll

October 04, 2016 21:05 Edited
How can I use the
```
<%= f.cl_image_upload(:image, :folder => "my_folder") %>
```
with simple_form?
0
Maor Gariv

March 31, 2017 07:06
Hi,
Sorry for the very late reply, we have noticed that this request was left unattended. I guess this is not relevant anymore but if you have any further questions, feel free to reach out by opening a new support ticket -
https://support.cloudinary.com/hc/en-us/requests/new
0

Daniel Mendoza

March 30, 2019 00:14

Hi,

To save the `public_id` with that structure to your uploader, you can do the following:

def public_id
   "#{store_dir}/#{model.id}"
end

def filename
   "#{public_id}.#{file.extension}" if original_filename.present?
end

def store_dir
   "uploads/#{model.class.to_s.underscore}/#{mounted_as}"
end

Let me know if this works for you.

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