I think I misunderstood something, but I cannot find out what. My Rails app create an embedded one to many model the first time the user signup, then it schedule twice a day it's updates, ... but duplicate each user entry was previously already saved, each time it run.

The user model is app/models/user.rb :
<pre>
class User
include Mongoid::Document

field :provider
field :uid
field :name

embeds_many :watchlists

def self.create_with_omniauth(auth)

nickname = auth['user_info']['nickname']
conn = FaradayStack.build 'https://api.github.com'
resp = conn.get "/users/#

{nickname}/watched"

create! do |user|
user.provider = auth["provider"]
user.uid = auth["uid"]
user.name = auth["user_info"]["name"]

resp.body.each do |repo|
user.watchlists.build( html_url: "#{repo['html_url']}",
description: "#{repo['description']}",
created_at: "#{repo['created_at']}",
pushed_at: "#{repo['pushed_at']}",
end
end
end
end
</pre>

while the embedded child is app/models/watchlist.rb :

<pre>
class Watchlist
include Mongoid::Document

field :html_url
field :description
field :created_at, :type => DateTime
field :pushed_at, :type => DateTime

embedded_in :user
end
</pre>

Now, what seems to be broken, is the scheduled code ( running within rufus-scheduler ):

<pre>
conn = FaradayStack.build 'https://api.github.com'
User.all.map do |user|
nickname = user.nickname
resp = conn.get "/users/#{nickname}

/watched"

resp.body.each do |repo|
user.watchlists.build( html_url: "#

{repo['html_url']}

",
description: "#

{repo['description']}

",
created_at: "#

{repo['created_at']}

",
pushed_at: "#

{repo['pushed_at']}

" )
user.update_attributes!
end
end
</pre>

Where did i go wrong with that ?
Thanks in advance