Unexpected method was called when receive some JSON response

[ryz310]

Hi, I have a trouble. Please see below.

An API is expected to return following result as JSON.

{
  "age_range": {
    "max": 30,
    "min": 20
  }
}

A Sawyer::Agent instance returns result as Sawyer::Resource.

agent = Sawyer::Agent.new('https://example.com')
result = agent.call(:get, 'age_range')
result[:max] # => 30

However, if the API returns following result, above execution will unexpected result.

{
  "age_range": {
    "min": 20
  }
}

result = agent.call(:get, 'age_range')
result[:max] # => [:min, 20]

I think the cause is into the Sawyer::Resource implementation. Sawyer::Resouce#[] calls #method_missing and searches the key from inner fields. Ordinarily it will return nil if does not find the key.

However, :max is Enumerable module instance so it will happen that calls Enumerable#max method.