We've noticed the following warning while testing the upgrade to
Ruby 3.0:
warning: File.exists? is deprecated; use File.exist? instead
We're adding a Rubocop rule so we don't call the deprecated method
in the future.
All the code in the `bin/` and the `config/` folders has been generated
running `rake app:update`. The only exception is the code in
`config/application.rb` where we've excluded the engines that Rails 6.0
has added, since we don't use them.
There are a few changes in Active Storage which aren't compatible with
the code we were using until now.
Since the method to assign an attachment in ActiveStorage has changed
and is incompatible with the hack we used to allow assigning `nil`
attachments, and since ActiveStorage now supports assigning `nil`
attachments, we're removing the mentioned hack. This makes the
HasAttachment module redundant, so we're removing it.
Another change in ActiveStorage is files are no longer saved before
saving the `ActiveStorage::Attachment` record. This means we need to
manually upload the file when using direct uploads. We also have to
change the width and height validations we used for images; however,
doing so results in very complex code, and we currently have to write
that code for both images and site customization images.
So, for now, we're just uploading the file before checking its
dimensions. Not ideal, though. We might use active_storage_validations
in the future to fix this issue (when they support a proc/lambda, as
mentioned in commit 600f5c35e).
We also need to update a couple of tests due to a small change in
response headers. Now the content disposition returns something like:
```
attachment; filename="budget_investments.csv"; filename*=UTF-8''budget_investments.csv
```
So we're updating regular expression we use to check the filename.
Finally, Rails 6.0.1 changed the way the host is set in integration
tests [1] and so both `Capybara.app_host` and `Capybara.default_host`
were ignored when generating URLs in the relationable examples. The only
way I've found to make it work is to explicitely assign the host to the
integration session. Rails 6.1 will change this setup again, so maybe
then we can remove this hack.
[1] https://github.com/rails/rails/pull/36283/commits/fe00711e9
This fixes a few issues we've had for years.
First, when attaching an image and then sending a form with validation
errors, the image preview would not be rendered when the form was
displayed once again. Now it's rendered as expected.
Second, when attaching an image, removing it, and attaching a new
one, browsers were displaying the image preview of the first one. That's
because Paperclip generated the same URL from both files (as they both
had the same hash data and prefix). Browsers usually cache images and
render the cached image when getting the same URL.
Since now we're storing each image in a different Blob, the images have
different URLs and so the preview of the second one is correctly
displayed.
Finally, when users downloaded a document, they were getting files with
a very long hexadecimal hash as filename. Now they get the original
filename.
Our previous system to delete cached attachments didn't work for
documents because the `custom_hash_data` is different for files created
from a file and files created from cached attachments.
When creating a document attachment, the name of the file is taken into
account to calculate the hash. Let's say the original file name is
"logo.pdf", and the generated hash is "123456". The cached attachment
will be "123456.pdf", so the generated hash using the cached attachment
will be something different, like "28af3". So the file that will be
removed will be "28af3.pdf", and not "123456.pdf", which will still be
present.
Furthermore, there are times where users choose a file and then they
close the browser or go to a different page. In those cases, we weren't
deleting the cached attachments either.
So we're adding a rake task to delete these files once a day. This way
we can simplify the logic we were using to destroy cached attachments.
Note there's related a bug in documents: when editing a record (for
example, a proposal), if the title of the document changes, its hash
changes, and so it will be impossible to generate a link to that
document. Changing the way this hash is generated is not an option
because it would break links to existing files. We'll try to fix it when
moving to Active Storage.
