分配變數時“nil不能被強制轉換為整數”（僅限）

紅寶石'2.7.3'導軌（6.1.4.1）

看起來很奇怪：

當我使用 activerecord 查詢 DB 中的某些（某些特定）行并嘗試將其分配給變數時，它會引發“nil can't be coerced into Integer”

但是當我不嘗試將它分配給變數時，它可以作業：

Recipient.find(45638)
 => #<Recipient id: 45638, company_id: 7, callout_id: 18, phone: "***", created_at: "2022-02-14 02:14:04.816032000  0000", updated_at: "2022-02-15 06:50:37.828979000  0000", payload: {"first_name"=>"", "last_name"=>"", "lead_id"=>"388014"}, started_at: nil, finished_at: 1644907333994, call_duration: 95, call_result: nil, report_data: {"Recording"=>"...", "UF_CRM_1601886091616"=>"76"}, job_status: "longCallWithResult", job_id: "2105242339", aasm_state: "finished", attempts: 1, tag: "...", tag_payload: {}, code: "37cca71006817c4f9e2e172d4e0afe80", schedule_at: "2022-02-11 09:07:47.000000000  0000", synced_to_external_crm: false> 

2.7.3 :035 > recipient = Recipient.find(45638)
Traceback (most recent call last):
TypeError (nil can't be coerced into Integer)

它只發生在資料庫中的特定行上。不僅使用模型物件，還使用 ??ActivRecord::Relation 物件：

作品：

recipients = Recipient.where(callout_id: 18).where('schedule_at IS NULL OR schedule_at <= ?', DateTime.current).limit(1).offset(5)

 => #<ActiveRecord::Relation [#<Recipient id: 45640, company_id: 7, callout_id: 18, phone: "***", created_at: "2022-02-14 04:59:10.175701000  0000", updated_at: "2022-02-15 06:50:38.224724000  0000", payload: {"firs... 

不起作用：

2.7.3 :045 > recipients = Recipient.where(callout_id: 18).where('schedule_at IS NULL OR schedule_at <= ?', DateTime.current).limit(1).offset(6)

Traceback (most recent call last):
TypeError (nil can't be coerced into Integer)

不同型號也會出現同樣的問題：

模型“標注”：

2.7.3 :001 > callout = Callout.find 18
 => #<Callout id: 18, company_id: 7, name: "***", token: [FILTERED], created_at: "2021-12-19 13:50:51.383907000  0000", updated_at: "2022-02-08 09:19:20.153542000  0000", auto_queue: true> 

2.7.3 :002 > callout = Callout.find 17
Traceback (most recent call last):
TypeError (nil can't be coerced into Integer)

2.7.3 :003 > Callout.find 17
 => #<Callout id: 17, company_id: 1, name: "***", token: [FILTERED], created_at: "2021-11-27 11:07:30.927895000  0000", updated_at: "2022-02-14 07:59:24.154910000  0000", auto_queue: false> 

2.7.3 :004 > Callout.find 18
 => #<Callout id: 18, company_id: 7, name: "***", token: [FILTERED], created_at: "2021-12-19 13:50:51.383907000  0000", updated_at: "2022-02-08 09:19:20.153542000  0000", auto_queue: true> 

模型“公司”：

2.7.3 :005 > Company.find 7
 => #<Company id: 7, name: "***", created_at: "2021-12-19 13:39:12.045709000  0000", updated_at: "2021-12-19 13:39:12.045709000  0000", balance: 0, api_token: [FILTERED]> 

2.7.3 :006 > c = Company.find 7
 => #<Company id: 7, name: "***", created_at: "2021-12-19 13:39:12.045709000  0000", updated_at: "2021-12-19 13:39:12.045709000  0000", balance: 0, api_token: [FILTERED]> 

2.7.3 :008 > Company.find 1
 => #<Company id: 1, name: "***", created_at: "2021-10-22 12:23:19.831733000  0000", updated_at: "2021-12-01 20:15:04.464389000  0000", balance: 0, api_token: [FILTERED]> 

2.7.3 :007 > c = Company.find 1
Traceback (most recent call last):
TypeError (nil can't be coerced into Integer)

模型源代碼：

class Recipient < ApplicationRecord
  validates :phone, presence: true, uniqueness: { scope: :callout_id }
  validates :code, presence: true, uniqueness: true
  belongs_to :company
  belongs_to :callout

  before_validation :generate_code

  private

  # Generates unique code for every recipient
  # because phone column can't be unique
  def generate_code
    if self.code.nil?
      self.code = Recipient.make_code self.phone, self.callout_id, self.payload
    end
  end

end


class Callout < ApplicationRecord
  belongs_to :company
  has_many :recipients, dependent: :destroy
  validates :company_id, presence: true
  validates :name, presence: true

  scope :auto_queue, -> { where(auto_queue: true ) }

end


class Company < ApplicationRecord

  before_validation :generate_token!

  has_many :callouts, dependent: :destroy
  has_many :recipients, dependent: :destroy
  has_many :user_companies, dependent: :destroy
  has_many :users, through: :user_companies
  has_many :invoices, dependent: :destroy
  has_many :balance_logs, dependent: :destroy

  validates :name, presence: true


  def generate_token!
    if api_token.nil?
      update! api_token: SecureRandom.hex
    end
  end

end

uj5u.com熱心網友回復：

這與一些與使用--nomultiline或IRB.conf[:USE_MULTILINE] = false內部.irbrc檔案有關的意外問題有關。

與黑客類似的問題

為避免該問題，您可以--nomultiline在啟動 rails 控制臺時跳過使用選項。

bundle exec rails c -e production

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