Ruby - 意外的Hash数据结构

Question

A simple question:

In rails I get as response an hash like this:

{"success":true,"new_id":816704027}

So, the difference from a normal structure I guess is- "new_id": -instead of- new_id:

Does anyone know how to retrieve the data labelled "new_id"? The usual array["new_id"] doesn't work.

The response to the code:

new_customer_id = @response.body
puts new_customer_id
puts new_customer_id["new_id"]

is simply:

=> {"success":true,"new_id":816704028}
=> new_id

I come from the implementation of JSON_response. Anyway, they changed the app and I don't have anymore a JSON message, but they use the method:

return_200(additional_items: {:new_id => "@customer.id"} )

More:

If I write:

new_customer_id = @response.body
puts new_customer_id
puts new_customer_id[:new_id]

the answer printed is simply:

=> {"success":true,"new_id":816704028}

and the request for the :new_id content does not to be received.

Much more interesting is the following: After the fact that:

puts new_customer_id["new_id"]

prints:

=> new_id

If I write:

puts new_customer_id["new_id"][0]
puts new_customer_id["new_id"][1]
puts new_customer_id["new_id"][2]
...

I obtain:

=> n
=> e
=> w
...

Also:

if I write:

puts new_customer_id["new_"]
puts new_customer_id["new_i"]

I obtain:

=> new_
=> new_i

and if I write:

puts new_customer_id["new_id_anyOtherCharacter"]

I get nothing

Luca

Answer 1

That's not a ruby object you are getting back. It's JSON. You can get the new_id in a variety of ways:

JSON.parse(@response.body)["new_id"]

JSON.parse(@response.body).symbolize_keys[:new_id]

JSON.parse(@response.body).with_indifferent_access[:new_id]

Answer 2

使用params来获得如下值：

new_id= array[:new_id]

Answer 3

I bet the hash has a symbol key instead of a string key. Try with array[:new_id] .