ruby on rails-Rake任务-未定义的方法

Question

我修改了创建一个rake任务的方法，该任务可以获取给定页面抛出facebook图的签入量。我喜欢考拉的宝石和栏杆。

我通过创建一个rake任务来做到这一点：

task :get_likes => :environment do
    require 'koala'
    # Grab the first user in the database
    user = User.first
    # Loop throw every school & and call count_checkins
    School.columns.each do |column|
        user.facebook.count_checkins(column.name, user)
    end
end
# Count like for every school else return 0
def count_checkins(name, u)
    a = u.facebook.fql_query('SELECT checkins FROM page WHERE name = "' + name + '"')
    if a[0].nil?
        return 0
    else 
        return b = a[0]["checkins"]
    end
end
# Initialize an connection to the facebook graph
def facebook
    @facebook ||= Koala::Facebook::API.new(oauth_token)
end

但我得到了一个错误：

private method `count_checkins' called for #<Koala::Facebook::API:0x007fae5bd348f0>

任何编写rake任务代码的想法或更好的方法都会很棒！

请在此处查看完整错误：https://gist.github.com/shuma/4949213

Answer 1

在注释中无法正确格式化，所以我将把它放在一个答案中。我会将以下内容放入用户模型中：

# Count like for every school else return 0
def count_checkins(name)
    a = self.facebook.fql_query('SELECT checkins FROM page WHERE name = "' + name + '"')
    if a[0].nil?
        return 0
    else 
        return b = a[0]["checkins"]
    end
end
# Initialize an connection to the facebook graph
def facebook
    @facebook ||= Koala::Facebook::API.new(oauth_token)
end

然后将rake任务更改为：

task :get_likes => :environment do
    require 'koala'
    # Grab the first user in the database
    user = User.first
    # Loop throw every school & and call count_checkins
    School.columns.each do |column|
        user.count_checkins(column.name)
    end
end

通过这种方式，count_checkins是在用户模型上定义的，而不是试图在Koala中修改一个类——而且你不需要传递更多的user和Facebook参数来重复工作。