I work with Rails 4 and use PaperClip to attach images to different models.
I would like to retrieve styles dimensions in order to use them as a hint for user, something like:
<%= t('image_dimensions_hint', :dimensions => Person.avatar.standard') %>
When my model Person looks like that:
has_attached_file :avatar,
:styles => {
:standard => "150x150>",
:small => "50x50>>",
}
Is it possible?
Not sure about the question but I think you can get the dimensions with this:
:dimensions => Paperclip::Geometry.from_file(file.queued_for_write[:original].path)
Related
When integrating my RoR application with AWS to store a user's Facebook photo, the photo is stored as "original" rather than "medium".
Here is the relevant information from my User model:
class User < ActiveRecord::Base
has_attached_file :avatar,
:storage => :s3,
:style => {:medium => "370x370", :thumb => "100x100"}
validates_attachment_content_type :avatar, :content_type => /\Aimage\/.*\Z/
Calling the original photo is successful, but I need the medium thumbnail, because displaying the photo as original presents an aesthetic issue.
Here is the relevant information from my _user.html.erb user file:
<div class="img"><%= image_tag user.avatar.url(:original), height: "370", width: "370" %> </div>
however, like I said, I do not want to put original, I would like to call the file from AWS, like so:
<%= image_tag user.avatar.url(:medium)
When I inspect the page, I see that ":medium" it is not being saved, so I would assume this is a problem with the model user.rb, but any and all help is greatly appreciated, as I've been stuck on this issue for quite some time.
I assume you need to first set the validator. I think PaperClip cares about the image size. So in your model:
validates_with AttachmentSizeValidator, :attributes => :avatar, :less_than => 1.megabytes
That worked for me.
Using Rails 3.2 and Paperclip 3.4.2. I have the following:
# photo.rb
has_attached_file :data,
:styles => {
:picture_lightbox => ["600x450>", :jpg],
:picture_preview => ["250x250^", :jpg],
:picture_thumb => ["76x76^", :jpg]
},
:default_url => "placeholder_:style.png"
# shop.rb
has_many :photos
# show.html.erb
<% if !shop.photos.blank? %>
<%= image_tag(shop.photos[0].data.url(:picture_thumb)) %>
<% else %>
<%= image_tag('placeholder_picture_thumb.png') %>
<% end %>
While this works, but it defeats the purpose of specifying :default_url in photo.rb, because I don't know a way to show the default image when shop.photos (which is an array of photo objects) is blank.
This is not about asset pipeline. It's about how can I detect that shop.photos is blank, then it returns the default image url, instead of explicitly specifying the default image url. What should I change?
The purpose of :default_url on Paperclip in your case is to set a default url for photo object. But you have a problem with showing a default "cover photo" of shop. This is additional logic in your code. You cannot achieve this only with Paperclip's :default_url option. If you want to take advantage of :default_url option, I will suggest you to create a method in shop.rb which looks something like this:
def cover_url
# I guess you want to use first photo based on your code
photos.first_or_initialize.data.url(:picture_thumb)
end
Then in your view you will have just <%= image_tag(shop.cover_url) %>
Actually the default URL will work when you have a relation like
class User
has_attached_file :photo
end
when user.photo is nil, default user.photo.url will return default URL.
What you have done in your case seems correct to me.
I have two models. One being Image which has an attachment called "file" and saves to "/photos". These would be simple images that would be inside of, say, an album. I also have users that have an attachment called "avatar" which saves to "avatars/etc etc". How can I copy one attachment (#image.file) over to my user to save it as his avatar? I want the user to be able to select an image that he/she has in their album images and use it as an avatar. I want to copy it though so if the user ever deletes that image from their album, it won't delete their avatar.
User Model Snippet:
has_attached_file :avatar, :styles => {
:huge => '220x220!',
:full => '72x72!',
:medium => '48x48!',
:small => '24x24!'
},
:path => ':rails_root/public/avatars/:userid_prefix/:userid/:style-:random.:extension',
:url => '/avatars/:userid_prefix/:userid/:style-:random.:extension',
:default_url => :default_avatar_url
Image Model Snippet
has_attached_file :file,
:styles => {
:large => '640x480',
:avatar => '72x72!',
:cover => '160x160!'},
:path => ':rails_root/public/photos/:userid_prefix/:userid/:id_:style-:random.:extension',
:url => '/photos/:userid_prefix/:userid/:id_:style-:random.:extension'
Perhaps not the most efficient approach in the world, but you could have Paperclip import the image from the URL on your site.
Let's say you present the user with their photos, and whichever one they click calls User#update with params => { :avatar_url => 'http://www.yourownwebsite.com/url/of/image.jpg' }.
You then process this param in the controller doing something like:
if params.has_key? :avatar_url
begin
#user.avatar = open params[:avatar_url]
rescue
logger.warn "Unable to open #{params[:avatar_url]}"
end
end
if #user.save
# Regular response handling goes here...
I'm implementing a generic media gallery using Ruby on Rails. I've chosen ActiveAdmin to handle the administration portion of my task and it's worked well so far, except for one thing: It's not displaying the "Choose file" dialog as intended.
This is a form for my "Media" section of ActiveAdmin. I have a model called "Medium" with the following fields (in addition to id and timestamp:
asset_file_name
asset_file_size
asset_content_type
asset_updated_at
My Medium model looks like this:
class Medium < ActiveRecord::Base
has_and_belongs_to_many :galleries
has_and_belongs_to_many :entities
has_attached_file :asset, :styles => { :medium => "300x300>", :thumb => "100x100>" }
attr_accessible :asset
end
And I'm adding it to the ActiveAdmin form like this:
form :html => { :enctype => "multipart/form-data" } do |f|
f.input :asset, :as => :file
f.buttons
end
Here's a screencap of my ActiveAdmin page:
I see nothing wrong with how I'm implementing this. I've read that Formtastic has historically had issues with paperclip and I'm not averse to switching to attachment_fu or any other suitable solutions.
I should also note: I know that I can add in a custom partial. It's not my ideal solution, as I'd like to keep everything in the Formtastic DSL.
Thanks!
Formtastic requires that you wrap all calls to #input in a call to #inputs. It's definitely something that I would like to see fixed in Active Admin.
It should work if you wrap your input in a call to inputs:
form :html => { :enctype => "multipart/form-data" } do |f|
f.inputs do
f.input :asset, :as => :file
end
f.buttons
end
Let me know if this works for you.
Or you can do:
form :html => {:multipart => true} do |f|
which is easier to remember, imho.
the latest active admin handle it automatic
I use carrier wave with active admin and works as above.
This should be a simple thing to do, but I'm running into a wall and I'm not sure how to debug this response.
In my Image model, I have:
class Image < ActiveRecord::Base
has_attached_file :image, :styles => { :display => "500x500>",
:thumbnail => "95x95>"}
Then in my Views, my form contains this:
-form_for #image, :html => { :multipart => true } do |image|
%tr
%td.woc_left
=label_tag :image, 'photo to upload', :class => 'required'
%td.woc_center
=image.file_field :image
In my Mysql table, I have a column called "image_file_name" (string).
However, when I try to upload an image and submit it, I see
2 errors prohibited this from being saved
There were problems with the following fields:
Image Paperclip::CommandNotFoundError
Image Paperclip::CommandNotFoundError
What am I doing wrong? Thank you for your help!
Paperclip relies on external tools to resize the images. It looks like you either don't have the tools installed or they are not found.
I've used ImageMagick but other tools may be usable by Paperclip.
Which environment are you running on?