CarrierWave causing json output to become nested on photo key - ruby-on-rails

Question

I have a weird issue with CarrierWave that I can't find anywhere else.
I'm using Jbuilder to generate the JSON for my API. I have a photos table and a url field on the table.
Without mount_uploader :url PhotoUploader on the photos model, my JSON looks like this:
"photos": [
{
"id": 11,
"url": "https://s3.amazonaws.com/...",
"order": 1
},
{
"id": 12,
"url": "https://s3.amazonaws.com/...",
"order": 2
}
]
But when I add the uploader, my JSON ends up looking like this:
"photos": [
{
"id": 3,
"url": {
"url": {
"url": "https://bucket-name.s3.amazonaws.com/uploads/photos/https%3A//s3.amazonaws.com/bucket-name/uploads/folder/photos/img-name.jpg"
}
},
"order": 2
},
{
"id": 2,
"url": {
"url": {
"url": "https://bucket-name.s3.amazonaws.com/uploads/photos/https%3A//s3.amazonaws.com/bucket-name/uploads/folder/photos/img-name.jpg"
}
},
"order": 1
}
],
Everything works fine, but the JSON is just so messy looking, and a pain to iterate over. Also, can anyone explain why the URL is so weird looking, repeating itself twice?
Jbuilder code:
json.exercises current_user.current_training_week.exercises.uniq do |exercise|
json.id exercise.id
json.name exercise.name
json.description exercise.description
json.photos exercise.photos, :id, :url, :order
json.videos exercise.videos, :id, :url
end
Thanks!

Answer 1

#Arel, if you need to keep same json hash structure, just override :serializable_hash method in your uploader class:
class PhotoUploader < CarrierWave::Uploader::Base
def serializable_hash
model.read_attribute :url
end
end

Answer 2

When you do something like mount_uploader. CarrierWave will override the read column method and replace it with return an object of your uploader.
So when you try to call url on photo it return you an uploader with url method so it will keep calling url, and get the url value. So there are three url in your json.
But you can still use url_url methods get the origin value.
So if you just want to get the specific url, just do like this will be OK.
json.photos exercise.photos, :id, :url_url, :order #url_url is the url column value.