Using variables returned in object in ruby

Question

Im new to ruby and need to know how to easily display the specific variables in this returned response below.

Any help is greatly appreciated.

response

[#<Fedex::Rate:0x007fb9320ba7f0 @service_type="FEDEX_GROUND", 
  @rate_type="PAYOR_ACCOUNT_PACKAGE", @rate_zone="4", @total_billing_weight="6.0 LB", 
  @total_freight_discounts={:currency=>"USD", :amount=>"2.75"}, @total_net_charge="6.84", 
  @total_taxes="0.0", @total_net_freight="6.42", @total_surcharges="0.42", 
  @total_base_charge="9.17", @total_net_fedex_charge=nil, @total_rebates="0.0">]

We can't help you based on the code you've posted. You need to figure out what public methods the Fedex::Rate class exposes. — user229044
– user229044 ♦, Commented Mar 17, 2014 at 19:14
check if any getter method exist like #rate_type for the instances of the class Fedex::Rate.. — Arup Rakshit
– Arup Rakshit, Commented Mar 17, 2014 at 19:18
Do you have access to the source code of this object? If so paste that. It'll either be self explanatory or folks here can help you with code in front of them. — Richard Jordan
– Richard Jordan, Commented Mar 17, 2014 at 19:27

Mark Thomas · Accepted Answer · 2014-03-17 19:44:41Z

1

According to the docs, you call it this way:

rate = fedex.rate(:shipper=>shipper,
                  :recipient => recipient,
                  :packages => packages,
                  :service_type => "FEDEX_GROUND",
                  :shipping_options => shipping_options)

and then any of the instance variables (the @ variables) can be retrieved via an accessor:

puts rate.total_net_charge

answered Mar 17, 2014 at 19:44

Mark Thomas

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5 Comments

Jaison Brooks Over a year ago

Thanks Mark, appreciate the response. Im receiving a NoMethodError for total_net_charge by doing it this way. Any ideas?

Mark Thomas Over a year ago

It's not sufficient to know that it's a NoMethodError, you have to know what object it is being sent to. Please note the object in the error message.

Jaison Brooks Over a year ago

The returned response is undefined method total_net_charge' for #<Array:0x007fc8db3499b8> (NoMethodError)`

Mark Thomas Over a year ago

For some reason, your response is being wrapped in an Array. I'd like to see your calling code. Does it match the examples on the gem's documentation page? Try rate.first.total_net_charge instead.

Jaison Brooks Over a year ago

So if i had first to the call, it works!!! Thank you Mark. And yes it matches exactly what the doc states.

Pierre Pretorius · Accepted Answer · 2014-03-17 19:29:34Z

1

It looks like the response is an array with one object of type Fedex::Rate. As mentioned by others, you should read the docs to see what Fedex::Rate exposes as methods. To programatically see the methods Fedex::Rate exposes you could use:

rate = response.first
puts rate.methods

Alternatively if you want to read the variables from the object (which is probably a bad idea), you could use:

rate.instance_variable_get('@total_freight_discounts')

answered Mar 17, 2014 at 19:29

Pierre Pretorius

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2 Comments

Jaison Brooks Over a year ago

Thanks @Pierre Pretorius! The returned methods are in my above updated description.

Mark Thomas Over a year ago

@JaisonBrooks That looks like a stacktrace, not a method list.

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