未定义的局部变量或方法 'api' for main：Object (NameError)

Question

嗨，伙计们，我是 RoR 的新手，有问题， 当我尝试运行时，我在终端上收到此错误>Ruby api_controller.rb

未定义的局部变量或方法 'api' for main：Object (NameError(

这是我的代码：

require 'rubygems'  
require 'httparty'
url = https://api.coinmarketcap.com/v2/listings/ 
response = HTTParty.get(url) 
response.parsed_response

class Coinmarketcap
include HTTParty
base_uri 'api.coinmarketcap.com'
def listings
self.class.get('/v2/listings/')
end 
end

coinmarketcap = Coinmarketcap.new 
puts coinmarketcap.listings
coinmarketcap.listings.each do |post|   
#puts "Id: #{post['id']        
end

Answer 1

url 周围缺少引号

应该是：

url = 'https://api.coinmarketcap.com/v2/listings'

我复制/粘贴您的代码，它正在使用上述修改