英文:
Instance Methods Class Error: in `new': wrong number of arguments (given 7, expected 0) (ArgumentError)
问题
class Quarterbackattr_accessor :id, :firstname, :secondname, :club, :position, :price, :totalpointsdef initialize(id, firstname, secondname, club, position, price, totalpoints)@id = id@firstname = firstname@secondname = secondname@club = club@position = position@price = price@totalpoints = totalpointsenddef info"#{firstname} 在 #{club} 工作，价格是 #{price}。"endsparky = Quarterback.new('1', 'John', 'Edgar', 'Liverpool', 'Forward', '100', '38')puts sparky.infoend
英文:
Hi I am just getting the following error: "in `new': wrong number of arguments (given 7, expected 0) (ArgumentError)"
In app/services/quarterback.rb I have:
class Quarterbackattr_accessor :id, :firstname, :secondname, :club, :position, :price, :totalpoints,def initialize(id, firstname, secondname, club, position, price, totalpoints)@id = id@firstname = firstname@secondname = secondname@club = club@position = position@price = price@totalpoints = totalpointsenddef info"#{firstname} works for #{club} and has a cost of #{price}."endsparky = Quarterback.new('1', 'John', 'Edgar', 'Liverpool', 'Forward', '100', '38' )puts sparky.infoend
Thanks for the help!
答案1
得分: 1
那是因为在第二行末尾有一个,：
attr_accessor :id, :firstname, :secondname, :club, :position, :price, :totalpoints,
需要替换为：
attr_accessor :id, :firstname, :secondname, :club, :position, :price, :totalpoints
关于为什么触发了该错误的更详细解释，请阅读这个很棒的答案：https://stackoverflow.com/a/58176158/11330290
英文:
That's because you have a , at the end of line 2:
attr_accessor :id, :firstname, :secondname, :club, :position, :price, :totalpoints,
to be replaced with
attr_accessor :id, :firstname, :secondname, :club, :position, :price, :totalpoints
For a more detailed explanation as to why that error was triggered, I would suggest to have a read at this great answer: https://stackoverflow.com/a/58176158/11330290
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