CODEWITHSUNDEEP
ruby-on-railsactiverecordsinatra
0xSina
0xSina

Reputation: 21603

to_json wrapping a single object in array?

In my API, I am converting an ActiveRecord object into json via:

user.to_json :methods => :new_messages

Using irb, when I execute this statement, I get:

{someAttr: someValue, ....}

which is perfect. This is a single object so it's not wrapped in an array. Now when I run this in sinatra app like this:

get '/api/users/:fb_id' do |fb_id|
    user = User.where :fb_id => fb_id
    user.to_json :methods => :new_cookies
end

It wraps it in an array!!! Like this:

[{someAttr: someValue, ....}]

How can I fix this, and more importantly, why?!?

Upvotes: 2

Views: 398

Answers (2)

ChuckE
ChuckE

Reputation: 5688

replace this line:

user = User.where :fb_id => fb_id

with this line:

user = User.find_by_fb_id fb_id

Upvotes: 1

user1790619
user1790619

Reputation: 510

Simply using Hash.[]

 Hash[{a: :b}]
 # => {:a=>:b}

and more importantly, why?!?

Which ORM are you using in the second example? If it's ActiveRecord, then User.where :fb_id => fb_id returns ActiveRecord::Relation object which wraps into an array when you call .to_json. It can be fixed like so

get '/api/users/:fb_id' do |fb_id|
  user = User.find_by_fb_id(fb_id)
  user.to_json :methods => :new_cookies
end

Upvotes: 1

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