Create an array with hash Ruby on Rails 4 - ruby-on-rails

Question

I am new at Ruby and Rails and I'm trying to create an array like this:
#data =[
{
order => {key => value, key1 => value1},
folder => { 0 => {key => value , key1 => value1}, 1 => {key => value, key1 => value}},
document => { 0 => {key => value , key1 => value1}, 1 => {key => value, key1 => value}}
},
{
order => {key => value, key1 => value1},
folder => { 0 => {key => value , key1 => value1}, 1 => {key => value, key1 => value}},
document => { 0 => {key => value , key1 => value1}, 1 => {key => value, key1 => value}}
},
]
I have 3 tables, Order, Folder and Document. I have to make a find in Order with certain condition and is going to retrieve some records.
If the find in Order retrieve 3(can be any number) records then I have to make 3 find in Folders and the condition is the Order.id.
Then I have to make a find in Document and the condition is the last Folder.id, this can retrieve many records.
So, I wanna make this so i can send #data to the view and make some foreach for show all the necessary information.
EDIT:
Mudasobwa this is what I try:
Order.where(conditions).find_each do |order|
logger.debug(order.id) #first log
Folder.where(condition order.id).find_each do |folder|
logger.debug(folder.id) #second log
end
Document.where(folder.id).find_each do |doc|
logger.debug(doc.id) #third log
end
end
With this I am getting the info that I want. 1 order.id then all the folders related with that order.id and all the document related with the last folder.id but I dont know how to create the #data array with all this info, how to join everything.