我正在使用ruby 1.9.3和mysql 5.5来处理Rails 3.2.9应用程序。我需要编写一个查询,我应该在我的控制器文件的where子句中使用用户定义的变量。这是代码..请让我知道我该怎么做!如果没有我怎样才能将对象转换(我猜是这样),我从代码行中没有4以便让我可以用一个Fixnum进行比较后如何在mysql中使用ruby的用户自定义变量?
def is_user_allowed?
@company_id = params[:user][:company_id]
#THIS LINES GIVES A SYNTAX ERROR AT '?'
@no_of_licenses = Company.find_by_sql("SELECT NO_OF_LICENSES FROM COMPANIES WHERE ID=?",@company_id)
#THIS LINE RETURNS AN OBJECT I GUESS N HENCE CANNOT COMPARE WITH FIXNUM
@no_of_licenses = Company.find(:first,:conditions => ["id = ?",@company_id] , :select => 'no_of_licenses')
@present_users = User.where("company_id = ?", @company_id).count
if @present_users < @no_of_licenses
return true
else
return false
end
end
谢谢洛特阿米特!他们都工作:) –