如何检查成员是否至少有一个有效成员？

Question

我一直在设法解决我的问题，但没有结果。我正在检查输入的成员是否有活跃的会员资格。

class Entry < ApplicationRecord
  belongs_to :member
  before_create :status

  def status
    member = Member.find(member_id)
    if member.has_active_membership
      return true
    else
      return false
    end
  end
end

class Member < ApplicationRecord
    has_many :memberships
    has_many :passes, through: :memberships

    def has_active_membership
        self.memberships.active?
    end
end

class Membership < ApplicationRecord
  belongs_to :member
  belongs_to :pass

  def active?
    if (self.valid_until >= Date.today)
      return true
    else
      return false
    end
  end
end

undefined method `active?' for #<ActiveRecord::Associations::CollectionProxy [#<Membership id: 1, name: "XD", valid_from: "2022-10-01", valid_until: "2022-10-31", member_id: 2, pass_id: 2, created_at: "2022-10-01 19:41:43.186045000 +0000", updated_at: "2022-10-01 19:41:43.186045000 +0000">]>
Did you mean?  acts_like? //error for member.rb has_active_membership

我很难确定会员是否至少有一个活跃的会员。谢谢你的帮助

Answer 1

问题是，您是在集合上调用active?，而不是在单个成员身份上调用

考虑到active?的实现方式，它不是一个作用域，您应该执行以下操作

def has_active_membership
  memberships.any?(&:active?)
end

另一种方法是将active实现为作用域。

scope :active, -> { where('valid_until >= ?', Date.today) }

然后

def has_active_membership
  memberships.active.exists?
end