Attach images in seed.rb file in rails using active storage - ruby

Question

I have a class called vehicles which can have an image attached to it. I have made a default image to display if no other image was uploaded in the vehicles.rb file.
I would like to include images in the seed.rb file so I don't have to manually upload all images. Is this possible?
Help is much appreciated thanks.
Here is my vehicle.rb:
class Vehicle < ApplicationRecord
belongs_to :make
belongs_to :model
accepts_nested_attributes_for :make
accepts_nested_attributes_for :model
has_one_attached :image
after_commit :add_default_image, on: %i[create update]
def add_default_image
unless image.attached?
image.attach(
io: File.open(Rails.root.join('app', 'assets', 'images', 'no_image_available.jpg')),
filename: 'no_image_available.jpg', content_type: 'image/jpg'
)
end
end
end
Here is how i am creating records in my seed file but I would like to include the images as well:
v = Vehicle.create(
vin: '1QJGY54INDG38946',
color: 'grey',
make_id: m.id,
model_id: mo.id,
wholesale_price: '40,000'
)

Answer 1

You could use the Ffaker gem to easily generate fake data and finally after creating the vehicle record you can update your record image attribute from the instance variable. Check Attaching File/IO Objects
This would be the code of db/seed.rb file:
if Vehicle.count.zero?
10.times do
v = Vehicle.create(
vin: FFaker::Code.ean,
color: FFaker::Color.name,
maker_id: m.id,
model_id: m.id,
wholesale_price: '40,000'
)
v.image.attach(
io: File.open(File.join(Rails.root,'app/assets/images/photo.jpg')),
filename: 'photo.jpg'
)
end
end
Don't forget to add the ffaker gem to your Gemfile file.

Answer 2

As the above answer states it's in the Edge Guides, for people having trouble getting the path right, this is an example of a line in the seeds.rb file attaching an avatar to the 1st created user:
User.first.avatar.attach(io: File.open(File.join(Rails.root,'app/assets/images/avatar.jpg')), filename: 'avatar.jpg')

Answer 3

This approach worked for me on Rails 7:
I put my images in public/images folder.
Seed the DB
db/seeds.rb
post = Post.create!(title: "My Title", description: "My description")
post.image.attach(io: File.open(Rails.root.join("public/images/sample.jpg")), filename: "sample.jpg")
Then in my views:
app/views/posts/show.html.erb
# to get the image URL:
polymorphic_url(#post.image)
# to display the image
image_tag post.image if post.image.attached?
All this assuming you installed ActiveStorage:
In your terminal:
$ rails active_storage:install
$ rails db:migrate
Then in your model:
models/post.rb
has_one_attached :image
And in your controller. Add image to permitted params:
params.require(:post).permit(:image, :everything_else)