An error occurred while Rails/UniqueValidationWithoutIndex cop

[jamesst20]

Information

0.80.1 (using Parser 2.7.0.5, running on ruby 2.6.3 x86_64-linux)

(Running under BitBucket-Pipeline in Ruby 2.6.3 docker image)

Edit April 1, 2020
Error is still present:

rubocop-rails 2.5.0
Mention the following information in the issue report:
0.81.0 (using Parser 2.7.0.5, running on ruby 2.6.3 x86_64-linux)

Error

An error occurred while Rails/UniqueValidationWithoutIndex cop was inspecting /opt/atlassian/pipelines/agent/build/app/models/user.rb:11:2.
To see the complete backtrace run rubocop -d.
1 error occurred:
An error occurred while Rails/UniqueValidationWithoutIndex cop was inspecting /opt/atlassian/pipelines/agent/build/app/models/user.rb:11:2.
Errors are usually caused by RuboCop bugs.
Please, report your problems to RuboCop's issue tracker.
https://github.com/rubocop-hq/rubocop/issues
Mention the following information in the issue report:
0.80.1 (using Parser 2.7.0.5, running on ruby 2.6.3 x86_64-linux)
Inspecting 56 files
........................................................
56 files inspected, no offenses detected

The file in error

# User of the app
class User < ApplicationRecord
  attr_writer :login # Used for devise authentication by username

  devise :invitable, :database_authenticatable,
         :recoverable, :rememberable, :trackable, :validatable,
         :confirmable, :lockable, :timeoutable, timeout_in: 2.days

  belongs_to :legacy_user, foreign_key: :id, inverse_of: :user

  validates :username, presence: true, uniqueness: { case_sensitive: false }
  validates :username, format: { with: /^[a-zA-Z0-9_\.]*$/, multiline: true }

  def login
    @login || username
  end

  def self.find_first_by_auth_conditions(warden_conditions)
    conditions = warden_conditions.dup
    login = conditions.delete(:login)
    if login.present?
      where(conditions).find_by(["lower(username) = :value ", { value: login.downcase }])
    elsif conditions[:username].nil?
      find_by(conditions)
    else
      find_by(username: conditions[:username])
    end
  end
end

Extra information

I am not able to replicate the issue on my PC (Mac OS Catalina).

Thank you

[denny]

I might have a bizarre extra clue or two to add to this:

denny/ShinyCMS-ruby@b2856c1

denny/ShinyCMS-ruby@a0c1a2a

[koic]

@jamesst20 Thank you for the feedback. Can you show me the backtrace of running rubocop -d?

[jamesst20]

@koic

BitBucket Pipeline didn't make it easy to copy paste hehe

https://pastebin.com/LQhyhHY3

[sagg0t]

@koic

Have same issue
0.74.0 (using Parser 2.7.0.5, running on ruby 2.6.5 x86_64-linux)

Running with debug flag gives this error:

An error occurred while Rails/UniqueValidationWithoutIndex cop was inspecting /home/oleh/dev/bookstore/app/models/category.rb:4:2.
undefined method `method?' for #<RuboCop::AST::BlockNode:0x0000558992abdbe8>
Did you mean?  method
               methods

[koic]

@olehvolynets Can you open a new issue with the error reproduction steps?
https://github.com/rubocop-hq/rubocop-rails/issues/new?template=bug_report.md

[sagg0t]

@koic Sorry, couldn't reproduce the error, but noticed that rubocop was outdated, so updating to 0.81.0 and rubocop-rails to 2.5 solved that error for me.
Previously had rubocop 0.74.0 and rubocop-rails 2.3.
But now have bug described in #225

[jamesst20]

I updated rubocop and still having the same error

Mention the following information in the issue report:
0.81.0 (using Parser 2.7.0.5, running on ruby 2.6.3 x86_64-linux)

[sagg0t]

@jamesst20 is rubocop-rails version 2.5 ?

[jamesst20]

@olehvolynets Yes it is

[koic]

RuboCop Rails 2.5.1 has been released. If the error is the same cause as #214, the issue will be resolved.
https://github.com/rubocop-hq/rubocop-rails/releases/tag/v2.5.1

If you upgrade to RuboCop Rails 2.5.1 and still get unexpected errors, please open a new issue with reproduction steps . Thank you for your feedback!

[jamesst20]

#226