Using ruby on rails. I want carrierwave upload of an SVG file to make .png thumbnails.
I'm having trouble with the syntax of getting carrierwave to convert the files to png.
This is close, and the contents of the thumbnails are png data, but the filename extension is .svg
class SvgUploader < CarrierWave::Uploader::Base
include CarrierWave::MiniMagick
storage :file
version :thumb do
process :convert => 'png'
process resize_to_fit: [50, 50]
end
version :thumb_small do
process :convert => 'png'
process resize_to_fit: [15, 15]
end
After lots of research, there's a way to change the file suffix. The difficult part is to get carrierwave to change only the suffix of the thumbnails. If you're not careful it will change all files suffixes including the your original upload file.
Here's what worked
class SvgUploader < CarrierWave::Uploader::Base
include CarrierWave::MiniMagick
storage :file
version :thumb do
def full_filename(for_file)
super(for_file).chomp(File.extname(super(for_file))) + '.png'
end
process :convert => 'png'
process resize_to_fit: [50, 50]
end
version :thumb_small do
def full_filename(for_file)
super(for_file).chomp(File.extname(super(for_file))) + '.png'
end
process :convert => 'png'
process resize_to_fit: [15, 15]
end
Related
My uploader allows images and pdf's
def extension_whitelist
%w(pdf jpg jpeg gif png)
end
I need to resize images and process quality. In order to do this, I need to check first if the file is an image.
I've added
version :large, :if => :image? do
process :quality => 70
process :resize_to_limit => [1400, 1200]
end
protected
def image?(new_file)
new_file.content_type.include? 'image'
end
However, I don't want a "version". I have the file link on the front-end and the link points to an optimized and not resized version.
How can I check file type without creating a new version of the file?
I've tried
if image?
process :quality => 70
process :resize_to_limit => [1400, 1200]
end
but I get No Method Error
I had to do this instead:
process :quality => 70, if: :image?
process :resize_to_limit => [1400, 1200], if: :image?
My default image is working with carrierwave, except I can't get a thumb version of the default. #profile.photo and #profile.photo.thumb both return the same default_profile.png. How do I get this to work
Also, when I do upload a photo, #profile.photo.thumb does correctly return the resized version of the uploaded photo.
In /assets/images:
I have default_profile.png and thumb_default_profile.png, the latter is, of course, a scaled down version of the former. I also tried renaming the thumb file to default_profile_thumb.png
relevant portion of profile_photo_uploader.rb:
def default_url
"default_profile.png"
end
version :thumb do
process :resize_to_fill => [60, 60]
end
def default_url
"default_profile.png"
end
version :thumb do
process :resize_to_fill => [60, 60]
def default_url
"thumb_default_profile.png"
end
end
Nicer way todo:
def default_url(*args)
ActionController::Base.helpers.asset_path([version_name, "default_profile.png"].compact.join('_'))
end
I have Image model:
class Image < ActiveRecord::Base
mount_uploader :file, ModuleImageUploader
end
To upload image I use carrierwave + cloudinary:
class ModuleImageUploader < CarrierWave::Uploader::Base
include Cloudinary::CarrierWave
process :resize_to_limit => [700, 700]
version :mini do
process :resize_and_pad => [50, 50, '#ffffff']
end
version :thumb do
process :resize_and_pad => [100, 100, '#ffffff']
end
def public_id
return SecureRandom.uuid
end
end
I created new model AccountMediaContent:
class AccountMediaContent < ActiveRecord::Base
mount_uploader :image, AccountMediaContentImageUploader
end
with it's uploader which also uses carrierwave:
class AccountMediaContentImageUploader < CarrierWave::Uploader::Base
include Cloudinary::CarrierWave
process :resize_to_limit => [700, 700]
version :mini do
process :resize_and_pad => [50, 50, '#ffffff']
end
version :thumb do
process :resize_and_pad => [100, 100, '#ffffff']
end
def extension_white_list
%w(jpg jpeg gif png)
end
end
Right now I need to the way to transfer the image from Image to AccountMediaContent. So, that means if I had such file in Image:
http://res.cloudinary.com/isdfldg/image/upload/v1344344359/4adcda41-49c0-4b01-9f3e-6b3e817d0e4e.jpg
Then it means that I need the exact same file in AccountMediaContent so the link to the file will be the same. Is there any way to achieve this?
The optimal solution for this would be to have a new model which represents the image, and then link it to both models.
Ok my solution is not really good but anyway. What I did is I wrote the script which downloaded already existing images Image in Cloudinary and then I attached them to new model AccountMediaContent.
My task looks like this:
Image.find_in_batches do |imgs_in_batch|
imgs_in_batch.each do |img|
# Downloading image to tmp folder (works on heroku too)
file_format = img.file.format
img_url = img.file.url
tmp_file = "#{Rails.root.join('tmp')}/tmp-img.#{file_format}"
File.open(tmp_file, 'wb') do |fo|
fo.write open(img_url).read
end
# Creating AccountMediaContent with old image (it'll be uploaded to cloudinary.
AccountMediaContent.create(image: File.open(tmp_file))
FileUtils.rm(tmp_file)
end
end
Hope it'll be useful for someone.
I have ImageUploader class and i want to save my original image with original size of the image after saving the particular version. Help me to solve this
Uploader
class ImageUploader < IconBase
process :resize_to_fill => [490,68]
version :normal do
process resize_to_fill: [245,34]
def full_filename(for_file = model.logo.file)
"avatar1.png"
end
end
def filename
"avatar.png"
end
end
Your original size is not saved, because you have process :resize_to_fill => [490,68] in your uploader. To keep original size, you can put this into another version, so your main image will stay unproccessed, like this:
version :large do
process :resize_to_fill => [490,68]
end
Then you'll have:
uploader.url # original image
uploader.large.url # [490,68] version
uploader.normal.url # [245,34] version
This is the message that I get when I try to upload something that is not an image for example an mp3.
Failed to manipulate with MiniMagick, maybe it is not an image?
Original Error: MiniMagick::Invalid
So I tried to put a condition by checking the file extension. Only resize if It's not an mp3.
Here is my FileUploader using CarrierWave:
class FileUploader < CarrierWave::Uploader::Base
include CarrierWave::MiniMagick
...
if File.extname(File.name) != ".mp3"
process :resize_to_fit => [100, 100]
version :thumb do
process :resize_to_fit => [80, 80]
end
end
...
end
File.name provide me only the name without the extension of the current file. Do you know the variable which provide me the name + the extension ?
EDIT:
I have found an alternative in my controller:
def create
#myfile = File.new(params[:icon])
if #myfile.save
if #myfile.file.file.extension != "mp3"
#myfile.file.resize_to_fit(100, 100)
#file.save
end
end
But now I'm stuck with on my CarrierWave FileUploader:
version :thumb do
process :resize_to_fit => [80, 80]
end
It's getting too complicated, I need MiniMagick only for images
I just need a small condition:
if file_is_image? ==> resize + create a thumbnail
else ==> do nothing
thanks
process :resize_to_fit => [100, 100]; :if => :processable?
def processable? upload_name
File.extname(upload_name.path) != ".mp3"
end