Paperclip :default_url - ruby-on-rails

I have a lot of files with has_attached_file method from paperclip but without :default_url; now I want to use the same image for all of them but I don't want to go from file to file and add this :default_url line for each file. There are some solution to set this in one place and will work for all the has_attached_file method calls?
I tried to do it in this way, but seems like it does not have any effect
module Paperclip
module ClassMethods
def has_attached_file(name, options = {})
options[:default_url] => Rails.root + "/missing.png"
HasAttachedFile.define_on(self, name, options)
end
end
end

You are about to make it work – just change options[:default_url] => Rails.root + "/missing.png" to options[:default_url] = Rails.root + "/missing.png" (= instead of =>).
However, I suggest a better solution:
module Paperclip
module ClassMethods
def has_attached_file_with_preconfigured_default_url(name, options = {})
options.reverse_merge! default_url: Rails.root + "/missing.png"
has_attached_file_without_preconfigured_default_url(name, options)
end
alias_method_chain :has_attached_file, :preconfigured_default_url
end
end
# Now you could use both new has_attached_file and old has_attached_file_without_preconfigured_default_url.
And place this code into initializer.

Related

Rails paperclip default image only under certain conditions

I've got a Lead model which is splited by lead_status param on products and offers. Only leads with product status should contain images and offers should not. I've migrated attached product_image table to schema and tried to set a default image only for products. Like this:
class Lead < ApplicationRecord
has_attached_file :product_image, styles: { small: "150x150>", default: "350x350"}
validates_attachment_content_type :product_image, content_type: /\Aimage\/.*\z/
before_save :product_image_default_url
def product_image_default_url
if self.lead_status == "product" && self.product_image.url.nil?
self.product_image.url = "/images/:style/default_user_avatar.png"
end
end
Every time when I save a new lead without uploaded image I get "/product_images/original/missing.png" as a default url. No matter which status it has.
Model doesn't recognize new leads by it's status
How can I change that? Force my Lead model to save a default image url according to a "product" status and ignore all those with "offer" status?
My rails version is 5.2.1 and paperclip 6.0.0
Try with following,
has_attached_file
:product_image,
styles: { small: "150x150>", default: "350x350"},
default_url: ":style/default_user_avatar.png"
# app/assets/images/medium/default_user_avatar.png
# app/assets/images/thumbs/default_user_avatar.png
Existing method is,
def default_url
if #attachment_options[:default_url].respond_to?(:call)
#attachment_options[:default_url].call(#attachment)
elsif #attachment_options[:default_url].is_a?(Symbol)
#attachment.instance.send(#attachment_options[:default_url])
else
#attachment_options[:default_url]
end
end
In initializer, Provide monkey patch for following,
require 'uri'
require 'active_support/core_ext/module/delegation'
module Paperclip
class UrlGenerator
def default_url
if #attachment.instance.lead_status == 'product'
default_url = attachment_options[:default_url]
else
default_url = # provide another missing default_url
end
if default_url.respond_to?(:call)
default_url.call(#attachment)
elsif default_url.is_a?(Symbol)
#attachment.instance.send(default_url)
else
default_url
end
end
end
end
Update as per cases

Displaying an Image from Rails Seeds.rb [duplicate]

Please suggest me a way to save an image from an URL by Paperclip.
In Paperclip 3.1.4 it's become even simpler.
def picture_from_url(url)
self.picture = URI.parse(url)
end
This is slightly better than open(url). Because with open(url) you're going to get "stringio.txt" as the filename. With the above you're going to get a proper name of the file based on the URL. i.e.
self.picture = URI.parse("http://something.com/blah/avatar.png")
self.picture_file_name # => "avatar.png"
self.picture_content_type # => "image/png"
Here is a simple way:
require "open-uri"
class User < ActiveRecord::Base
has_attached_file :picture
def picture_from_url(url)
self.picture = open(url)
end
end
Then simply :
user.picture_from_url "http://www.google.com/images/logos/ps_logo2.png"
It didn't work for me until I used "open" for parsed URI.
once I added "open" it worked!
def picture_from_url(url)
self.picture = URI.parse(url).open
end
My paperclip version is 4.2.1
Before open it wouldn't detect the content type right, because it wasn't a file. It would say image_content_type: "binary/octet-stream", and even if I override it with the right content type it wouldn't work.
First download the image with the curb gem to a TempFile and then simply assign the tempfile object and save your model.
Into official documentation is reported here https://github.com/thoughtbot/paperclip/wiki/Attachment-downloaded-from-a-URL
Anyway it seems not updated, because in last version of paperclip something has changed and this line of code is no more valid:
user.picture = URI.parse(url)
It raise an error, in particular this error is raised:
Paperclip::AdapterRegistry::NoHandlerError: No handler found for #<URI:: ...
The new correct syntax is this one:
url = "https://www.example.com/photo.jpeg"
user.picture = Paperclip.io_adapters.for(URI.parse(url).to_s, { hash_digest: Digest::MD5 })
Also we need to add these lines into config/initializers/paperclip.rb file:
Paperclip::DataUriAdapter.register
Paperclip::HttpUrlProxyAdapter.register
Tested this with paperclip version 5.3.0 and it works.
It may helpful to you. Here is the code using paperclip and image present in remote URL .
require 'rubygems'
require 'open-uri'
require 'paperclip'
model.update_attribute(:photo,open(website_vehicle.image_url))
In model
class Model < ActiveRecord::Base
has_attached_file :photo, :styles => { :small => "150x150>", :thumb => "75x75>" }
end
As those are old Answer's here's a newer one:
Add Image Remote URL to your desired Controller in the Database
$ rails generate migration AddImageRemoteUrlToYour_Controller image_remote_url:string
$ rake db:migrate
Edit your Model
attr_accessible :description, :image, :image_remote_url
.
.
.
def image_remote_url=(url_value)
self.image = URI.parse(url_value) unless url_value.blank?
super
end
*In Rails4 you have to add the attr_accessible in the Controller.
Update your form, if you allow other to upload an Image from a URL
<%= f.input :image_remote_url, label: "Enter a URL" %>
This is a hardcore method:
original_url = url.gsub(/\?.*$/, '')
filename = original_url.gsub(/^.*\//, '')
extension = File.extname(filename)
temp_images = Magick::Image.from_blob open(url).read
temp_images[0].write(url = "/tmp/#{Uuid.uuid}#{extension}")
self.file = File.open(url)
where Uuid.uuid just makes some random ID.

Paperclip how to change basename (filename)?

I am trying to change the basename (filename) of photos:
In my model I have:
attr_accessor :image_url, :basename
has_attached_file :image,
:styles => { :original => ["300x250>", :png], :small => ["165x138>", :png] },
:url => "/images/lille/:style/:id/:basename.:extension",
:path => ":rails_root/public/images/lille/:style/:id/:basename.:extension"
before_save :basename
private
def basename
self.basename = "HALLLO"
end
But the filename is not changed at all.
If you are assigning the file directly you can do this:
photo.image = the_file
photo.image.instance_write(:file_name, "the_desired_filename.png")
photo.save
Im doing this to strip whitespaces:
before_post_process :transliterate_file_name
private
def transliterate_file_name
self.instance_variable_get(:#_paperclip_attachments).keys.each do |attachment|
attachment_file_name = (attachment.to_s + '_file_name').to_sym
if self.send(attachment_file_name)
self.send(attachment).instance_write(:file_name, self.send(attachment_file_name).gsub(/ /,'_'))
end
end
end
I hope this will help you.
edit:
In your example:
def basename
self.image_file_name = "foobar"
end
Should do the job. (but might rename the method ;) )
Paperclip now allows you to pass in a FilenameCleaner object when setting up has_attached_file.
Your FilenameCleaner object must respond to call with filename as the only parameter. The default FilenameCleaner removes invalid characters if restricted_characters option is supplied when setting up has_attached_file.
So it'll look something like:
has_attached_file :image,
filename_cleaner: MyRandomFilenameCleaner.new
styles: { thumbnail: '100x100' }
And MyRandomFilenameCleaner will be:
class MyRandomFilenameCleaner
def call(filename)
extension = File.extname(filename).downcase
"#{Digest::SHA1.hexdigest(filename + Time.current.to_s).slice(0..10)}#{extension}"
end
end
You could get away with passing in a class that has a self.call method rather than an object but this conforms to Paperclip's documentation in Attachment.rb.
I wanted to avoid having to add a before_create callback to every model with an attachment. I had a look at the source and at the time of this writing it looked sth like:
module Paperclip
class Attachment
...
def assign_file_information
instance_write(:file_name, cleanup_filename(#file.original_filename))
instance_write(:content_type, #file.content_type.to_s.strip)
instance_write(:file_size, #file.size)
end
So you could just patch cleanup_filename.
config/initializers/paperclip.rb
module Paperclip
class Attachment
def cleanup_filename(filename)
"HALLLO"
end
end
end

Save image from URL by paperclip

Please suggest me a way to save an image from an URL by Paperclip.
In Paperclip 3.1.4 it's become even simpler.
def picture_from_url(url)
self.picture = URI.parse(url)
end
This is slightly better than open(url). Because with open(url) you're going to get "stringio.txt" as the filename. With the above you're going to get a proper name of the file based on the URL. i.e.
self.picture = URI.parse("http://something.com/blah/avatar.png")
self.picture_file_name # => "avatar.png"
self.picture_content_type # => "image/png"
Here is a simple way:
require "open-uri"
class User < ActiveRecord::Base
has_attached_file :picture
def picture_from_url(url)
self.picture = open(url)
end
end
Then simply :
user.picture_from_url "http://www.google.com/images/logos/ps_logo2.png"
It didn't work for me until I used "open" for parsed URI.
once I added "open" it worked!
def picture_from_url(url)
self.picture = URI.parse(url).open
end
My paperclip version is 4.2.1
Before open it wouldn't detect the content type right, because it wasn't a file. It would say image_content_type: "binary/octet-stream", and even if I override it with the right content type it wouldn't work.
First download the image with the curb gem to a TempFile and then simply assign the tempfile object and save your model.
Into official documentation is reported here https://github.com/thoughtbot/paperclip/wiki/Attachment-downloaded-from-a-URL
Anyway it seems not updated, because in last version of paperclip something has changed and this line of code is no more valid:
user.picture = URI.parse(url)
It raise an error, in particular this error is raised:
Paperclip::AdapterRegistry::NoHandlerError: No handler found for #<URI:: ...
The new correct syntax is this one:
url = "https://www.example.com/photo.jpeg"
user.picture = Paperclip.io_adapters.for(URI.parse(url).to_s, { hash_digest: Digest::MD5 })
Also we need to add these lines into config/initializers/paperclip.rb file:
Paperclip::DataUriAdapter.register
Paperclip::HttpUrlProxyAdapter.register
Tested this with paperclip version 5.3.0 and it works.
It may helpful to you. Here is the code using paperclip and image present in remote URL .
require 'rubygems'
require 'open-uri'
require 'paperclip'
model.update_attribute(:photo,open(website_vehicle.image_url))
In model
class Model < ActiveRecord::Base
has_attached_file :photo, :styles => { :small => "150x150>", :thumb => "75x75>" }
end
As those are old Answer's here's a newer one:
Add Image Remote URL to your desired Controller in the Database
$ rails generate migration AddImageRemoteUrlToYour_Controller image_remote_url:string
$ rake db:migrate
Edit your Model
attr_accessible :description, :image, :image_remote_url
.
.
.
def image_remote_url=(url_value)
self.image = URI.parse(url_value) unless url_value.blank?
super
end
*In Rails4 you have to add the attr_accessible in the Controller.
Update your form, if you allow other to upload an Image from a URL
<%= f.input :image_remote_url, label: "Enter a URL" %>
This is a hardcore method:
original_url = url.gsub(/\?.*$/, '')
filename = original_url.gsub(/^.*\//, '')
extension = File.extname(filename)
temp_images = Magick::Image.from_blob open(url).read
temp_images[0].write(url = "/tmp/#{Uuid.uuid}#{extension}")
self.file = File.open(url)
where Uuid.uuid just makes some random ID.

Paperclip Processors are not loaded in Rails 3.0.0rc

I just started using paperclip and have a custom processor. I have put the new processor in the correct location RAILS_ROOT/lib/paperclip_processors But, it does not get loaded.
The reason for not loading, is that Rails.root is nil at the time paperclip is loaded. I've tested this by putting explicit code into the paperclip.rb
puts "What is Rails.root? #{Rails.root} #{Rails.root.nil?}"
if defined?(Rails.root) && Rails.root
Dir.glob(File.join(File.expand_path(Rails.root), "lib", "paperclip_processors", "*.rb")).each do |processor|
require processor
end
end
Which will print out What is Rails.root true. And the processors are never load.
Is there a fix or work around for this? The work around right now is to just add a require for our processor. but that doesn't seem right. Here is the work around (our processor does tar'ing), in the model that will be using the processor, just require it at the top:
require "#{Rails.root}/lib/paperclip_processors/tar.rb"
class Ad < ActiveRecord::Base
has_attached_file :adzip,
:styles => { :targzip => {:processors => [:tar], :format => 'tgz'} }
end
I had to include the paperclip_processors directory
module Trunk
class Application < Rails::Application
Paperclip::Railtie.insert
# Custom directories with classes and modules you want to be autoloadable.
config.autoload_paths += %W(#{Rails.root}/lib)
config.autoload_paths += %W(#{Rails.root}/lib/paperclip_processors)
end
end
But I'm still having a problem where it's not loading the class within cropper.
Expected /Users/jspooner/Dropbox/active/local.active.com/rails3/trunk/lib/paperclip_processors/cropper.rb to define Cropper
cropper.rb
module Paperclip
class Cropper < Thumbnail
def transformation_command
if crop_command
crop_command + super[1..super.length]
else
super
end
end
def crop_command
target = #attachment.instance
if target.cropping?
" -crop '#{target.crop_w.to_i}x#{target.crop_h.to_i}+#{target.crop_x.to_i}+#{target.crop_y.to_i}'"
end
end
end
end

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