Sql 自定义提要，仅显示跟踪用户的文章

我一直在参考rails教程，试图创建一个提要，其中只有属于接受我朋友请求的用户的文章才会出现在我的提要中

然而，我有一个不同于教程的模式和用户模型（我还有一个额外的步骤，在这个步骤中，朋友请求等待接受）。我的用户模型中的以下方法不会过滤掉未被接受的友谊，因此未经确认的朋友的文章出现在我的提要中，这不是我想要的

user.rb

  has_many :friendships
  has_many :received_friendships, class_name: "Friendship", foreign_key: "friend_id"
  has_many :active_friends, -> { where(friendships: { accepted: true}) }, through: :friendships, source: :friend
  has_many :received_friends, -> { where(friendships: { accepted: true}) }, through: :received_friendships, source: :user
  has_many :pending_friends, -> { where(friendships: { accepted: false}) }, through: :friendships, source: :friend
  has_many :requested_friendships, -> { where(friendships: { accepted: false}) }, through: :received_friendships, source: :user

  def feed
    friend_ids = "SELECT friend_id FROM friendships
                     WHERE  user_id = :user_id"
    Article.where("user_id IN (#{friend_ids})
                     OR user_id = :user_id", user_id: id)
  end

  create_table "friendships", force: :cascade do |t|
    t.integer "user_id"
    t.integer "friend_id"
    t.boolean "accepted", default: false
    t.datetime "created_at", null: false
    t.datetime "updated_at", null: false
  end

<%= render @feed %>

schema.rb

  has_many :friendships
  has_many :received_friendships, class_name: "Friendship", foreign_key: "friend_id"
  has_many :active_friends, -> { where(friendships: { accepted: true}) }, through: :friendships, source: :friend
  has_many :received_friends, -> { where(friendships: { accepted: true}) }, through: :received_friendships, source: :user
  has_many :pending_friends, -> { where(friendships: { accepted: false}) }, through: :friendships, source: :friend
  has_many :requested_friendships, -> { where(friendships: { accepted: false}) }, through: :received_friendships, source: :user

  def feed
    friend_ids = "SELECT friend_id FROM friendships
                     WHERE  user_id = :user_id"
    Article.where("user_id IN (#{friend_ids})
                     OR user_id = :user_id", user_id: id)
  end

  create_table "friendships", force: :cascade do |t|
    t.integer "user_id"
    t.integer "friend_id"
    t.boolean "accepted", default: false
    t.datetime "created_at", null: false
    t.datetime "updated_at", null: false
  end

<%= render @feed %>

页面控制器

def home
    @feed = current_user.feed.all
end

home.html.erb

  has_many :friendships
  has_many :received_friendships, class_name: "Friendship", foreign_key: "friend_id"
  has_many :active_friends, -> { where(friendships: { accepted: true}) }, through: :friendships, source: :friend
  has_many :received_friends, -> { where(friendships: { accepted: true}) }, through: :received_friendships, source: :user
  has_many :pending_friends, -> { where(friendships: { accepted: false}) }, through: :friendships, source: :friend
  has_many :requested_friendships, -> { where(friendships: { accepted: false}) }, through: :received_friendships, source: :user

  def feed
    friend_ids = "SELECT friend_id FROM friendships
                     WHERE  user_id = :user_id"
    Article.where("user_id IN (#{friend_ids})
                     OR user_id = :user_id", user_id: id)
  end

  create_table "friendships", force: :cascade do |t|
    t.integer "user_id"
    t.integer "friend_id"
    t.boolean "accepted", default: false
    t.datetime "created_at", null: false
    t.datetime "updated_at", null: false
  end

<%= render @feed %>

---

对于您的案例，我认为关键在于这里（user\u id=：user\u id AND accepted=true），我从友谊模式中获取accepted字段

  def feed
    friend_ids = "SELECT friend_id FROM friendships
                     WHERE (user_id = :user_id AND accepted = 't')"
    Article.where("user_id IN (#{friend_ids})
                     OR user_id = :user_id", user_id: id)
  end