Rails%203%20In%20Action

Attaching a file
You use the url B method here with link_to to provide the user with a link to
download 6 this file. In this case, the URL for this file would be something like http://
localhost:3000/system/assets/1/original/file.txt.
Where is this system route defined? Well, it’s not a route. It’s actually a directory
inside the public folder of your application where Paperclip saves your files.
Requests to files from the public directory are handled by the server rather than by
Rails, and anybody who enters the URL in their browser can access them. This is bad
because the files in a project should be visible only to authorized users. You’ll handle
that problem a little later in the chapter.
Underneath the filename, you display the size of the file, which is stored in the
database as the number of bytes. To convert it to a human-readable output (such as
“71 Bytes,” which will be displayed for your file), you use the number_to_human_size
Action View helper.
With the file’s information now being output in app/views/tickets/show.html.erb,
this feature passes when you run bin/cucumber features/creating_tickets
.feature:
4 scenarios (4 passed)
52 steps (52 passed)
Awesome! Your files are being uploaded and taken care of by Paperclip, which stores
them at public/system/assets. Let’s see if your changes have brought destruction or salvation
by running rake cucumber:ok spec:
46 scenarios (46 passed)
466 steps (466 passed)
# and
26 examples, 0 failures, 11 pending
What I will say when I get through this book! Let’s commit but not push this just yet:
git add .
git commit -m "Added the ability to attach a file to a ticket"
Have a look at the commit output. It contains this line:
create mode 100644 public/system/assets/1/original/speed.txt
This line is a leftover file from your test and shouldn’t be committed to the repository
because you could be testing using files much larger than this. You can tell Git to
ignore the entire public/system directory by adding it to the .gitignore file. Open that
file now and add this line to the bottom:
public/system
6 Some browsers open certain files as pages rather than downloading them. Modern browsers do so for .txt files
and the like.
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