Error occurred Rails/UniqueValidationWithoutIndex

[katelovescode]

An error was thrown while running rubocop -a. All my cops pass.

---

Expected behavior

Not throw an error.

Actual behavior

All cops pass, but an error is thrown.

1 error occurred:
An error occurred while Rails/UniqueValidationWithoutIndex cop was inspecting /Users/katedonaldson/Projects/pieforproviders/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 2.6.5 x86_64-darwin19)

Steps to reproduce the problem

Backtrace for this error:

.Scanning /Users/katedonaldson/Projects/pieforproviders/app/models/user.rb
An error occurred while Rails/UniqueValidationWithoutIndex cop was inspecting /Users/katedonaldson/Projects/pieforproviders/app/models/user.rb:11:2.
undefined method `type' for nil:NilClass
/Users/katedonaldson/.rvm/gems/ruby-2.6.5@pieforproviders/gems/rubocop-rails-2.5.0/lib/rubocop/rails/schema_loader/schema.rb:82:in `each_content'
/Users/katedonaldson/.rvm/gems/ruby-2.6.5@pieforproviders/gems/rubocop-rails-2.5.0/lib/rubocop/rails/schema_loader/schema.rb:62:in `each'
/Users/katedonaldson/.rvm/gems/ruby-2.6.5@pieforproviders/gems/rubocop-rails-2.5.0/lib/rubocop/rails/schema_loader/schema.rb:62:in `map'
/Users/katedonaldson/.rvm/gems/ruby-2.6.5@pieforproviders/gems/rubocop-rails-2.5.0/lib/rubocop/rails/schema_loader/schema.rb:62:in `build_columns'
/Users/katedonaldson/.rvm/gems/ruby-2.6.5@pieforproviders/gems/rubocop-rails-2.5.0/lib/rubocop/rails/schema_loader/schema.rb:51:in `initialize'
/Users/katedonaldson/.rvm/gems/ruby-2.6.5@pieforproviders/gems/rubocop-rails-2.5.0/lib/rubocop/rails/schema_loader/schema.rb:27:in `new'
/Users/katedonaldson/.rvm/gems/ruby-2.6.5@pieforproviders/gems/rubocop-rails-2.5.0/lib/rubocop/rails/schema_loader/schema.rb:27:in `block in build!'
/Users/katedonaldson/.rvm/gems/ruby-2.6.5@pieforproviders/gems/rubocop-rails-2.5.0/lib/rubocop/rails/schema_loader/schema.rb:37:in `block in each_table'
/Users/katedonaldson/.rvm/gems/ruby-2.6.5@pieforproviders/gems/rubocop-rails-2.5.0/lib/rubocop/rails/schema_loader/schema.rb:34:in `each'
/Users/katedonaldson/.rvm/gems/ruby-2.6.5@pieforproviders/gems/rubocop-rails-2.5.0/lib/rubocop/rails/schema_loader/schema.rb:34:in `each_table'
/Users/katedonaldson/.rvm/gems/ruby-2.6.5@pieforproviders/gems/rubocop-rails-2.5.0/lib/rubocop/rails/schema_loader/schema.rb:26:in `build!'
/Users/katedonaldson/.rvm/gems/ruby-2.6.5@pieforproviders/gems/rubocop-rails-2.5.0/lib/rubocop/rails/schema_loader/schema.rb:12:in `initialize'
/Users/katedonaldson/.rvm/gems/ruby-2.6.5@pieforproviders/gems/rubocop-rails-2.5.0/lib/rubocop/rails/schema_loader.rb:34:in `new'
/Users/katedonaldson/.rvm/gems/ruby-2.6.5@pieforproviders/gems/rubocop-rails-2.5.0/lib/rubocop/rails/schema_loader.rb:34:in `load!'
/Users/katedonaldson/.rvm/gems/ruby-2.6.5@pieforproviders/gems/rubocop-rails-2.5.0/lib/rubocop/rails/schema_loader.rb:18:in `load'
/Users/katedonaldson/.rvm/gems/ruby-2.6.5@pieforproviders/gems/rubocop-rails-2.5.0/lib/rubocop/cop/rails/unique_validation_without_index.rb:128:in `schema'
/Users/katedonaldson/.rvm/gems/ruby-2.6.5@pieforproviders/gems/rubocop-rails-2.5.0/lib/rubocop/cop/rails/unique_validation_without_index.rb:35:in `on_send'
/Users/katedonaldson/.rvm/gems/ruby-2.6.5@pieforproviders/gems/rubocop-0.80.1/lib/rubocop/cop/commissioner.rb:57:in `block (2 levels) in trigger_responding_cops'
/Users/katedonaldson/.rvm/gems/ruby-2.6.5@pieforproviders/gems/rubocop-0.80.1/lib/rubocop/cop/commissioner.rb:136:in `with_cop_error_handling'
/Users/katedonaldson/.rvm/gems/ruby-2.6.5@pieforproviders/gems/rubocop-0.80.1/lib/rubocop/cop/commissioner.rb:56:in `block in trigger_responding_cops'
/Users/katedonaldson/.rvm/gems/ruby-2.6.5@pieforproviders/gems/rubocop-0.80.1/lib/rubocop/cop/commissioner.rb:55:in `each'
/Users/katedonaldson/.rvm/gems/ruby-2.6.5@pieforproviders/gems/rubocop-0.80.1/lib/rubocop/cop/commissioner.rb:55:in `trigger_responding_cops'
/Users/katedonaldson/.rvm/gems/ruby-2.6.5@pieforproviders/gems/rubocop-0.80.1/lib/rubocop/cop/commissioner.rb:32:in `block (2 levels) in <class:Commissioner>'
/Users/katedonaldson/.rvm/gems/ruby-2.6.5@pieforproviders/gems/rubocop-0.80.1/lib/rubocop/ast/traversal.rb:57:in `block in on_begin'
/Users/katedonaldson/.rvm/gems/ruby-2.6.5@pieforproviders/gems/rubocop-0.80.1/lib/rubocop/ast/traversal.rb:57:in `each'
/Users/katedonaldson/.rvm/gems/ruby-2.6.5@pieforproviders/gems/rubocop-0.80.1/lib/rubocop/ast/traversal.rb:57:in `on_begin'
/Users/katedonaldson/.rvm/gems/ruby-2.6.5@pieforproviders/gems/rubocop-0.80.1/lib/rubocop/cop/commissioner.rb:33:in `block (2 levels) in <class:Commissioner>'
/Users/katedonaldson/.rvm/gems/ruby-2.6.5@pieforproviders/gems/rubocop-0.80.1/lib/rubocop/ast/traversal.rb:99:in `on_class'
/Users/katedonaldson/.rvm/gems/ruby-2.6.5@pieforproviders/gems/rubocop-0.80.1/lib/rubocop/cop/commissioner.rb:33:in `block (2 levels) in <class:Commissioner>'
/Users/katedonaldson/.rvm/gems/ruby-2.6.5@pieforproviders/gems/rubocop-0.80.1/lib/rubocop/ast/traversal.rb:14:in `walk'
/Users/katedonaldson/.rvm/gems/ruby-2.6.5@pieforproviders/gems/rubocop-0.80.1/lib/rubocop/cop/commissioner.rb:44:in `investigate'
/Users/katedonaldson/.rvm/gems/ruby-2.6.5@pieforproviders/gems/rubocop-0.80.1/lib/rubocop/cop/team.rb:124:in `investigate'
/Users/katedonaldson/.rvm/gems/ruby-2.6.5@pieforproviders/gems/rubocop-0.80.1/lib/rubocop/cop/team.rb:112:in `offenses'
/Users/katedonaldson/.rvm/gems/ruby-2.6.5@pieforproviders/gems/rubocop-0.80.1/lib/rubocop/cop/team.rb:44:in `inspect_file'
/Users/katedonaldson/.rvm/gems/ruby-2.6.5@pieforproviders/gems/rubocop-0.80.1/lib/rubocop/runner.rb:296:in `inspect_file'
/Users/katedonaldson/.rvm/gems/ruby-2.6.5@pieforproviders/gems/rubocop-0.80.1/lib/rubocop/runner.rb:244:in `block in do_inspection_loop'
/Users/katedonaldson/.rvm/gems/ruby-2.6.5@pieforproviders/gems/rubocop-0.80.1/lib/rubocop/runner.rb:276:in `block in iterate_until_no_changes'
/Users/katedonaldson/.rvm/gems/ruby-2.6.5@pieforproviders/gems/rubocop-0.80.1/lib/rubocop/runner.rb:269:in `loop'
/Users/katedonaldson/.rvm/gems/ruby-2.6.5@pieforproviders/gems/rubocop-0.80.1/lib/rubocop/runner.rb:269:in `iterate_until_no_changes'
/Users/katedonaldson/.rvm/gems/ruby-2.6.5@pieforproviders/gems/rubocop-0.80.1/lib/rubocop/runner.rb:240:in `do_inspection_loop'
/Users/katedonaldson/.rvm/gems/ruby-2.6.5@pieforproviders/gems/rubocop-0.80.1/lib/rubocop/runner.rb:119:in `block in file_offenses'
/Users/katedonaldson/.rvm/gems/ruby-2.6.5@pieforproviders/gems/rubocop-0.80.1/lib/rubocop/runner.rb:143:in `file_offense_cache'
/Users/katedonaldson/.rvm/gems/ruby-2.6.5@pieforproviders/gems/rubocop-0.80.1/lib/rubocop/runner.rb:117:in `file_offenses'
/Users/katedonaldson/.rvm/gems/ruby-2.6.5@pieforproviders/gems/rubocop-0.80.1/lib/rubocop/runner.rb:108:in `process_file'
/Users/katedonaldson/.rvm/gems/ruby-2.6.5@pieforproviders/gems/rubocop-0.80.1/lib/rubocop/runner.rb:87:in `block in each_inspected_file'
/Users/katedonaldson/.rvm/gems/ruby-2.6.5@pieforproviders/gems/rubocop-0.80.1/lib/rubocop/runner.rb:86:in `each'
/Users/katedonaldson/.rvm/gems/ruby-2.6.5@pieforproviders/gems/rubocop-0.80.1/lib/rubocop/runner.rb:86:in `reduce'
/Users/katedonaldson/.rvm/gems/ruby-2.6.5@pieforproviders/gems/rubocop-0.80.1/lib/rubocop/runner.rb:86:in `each_inspected_file'
/Users/katedonaldson/.rvm/gems/ruby-2.6.5@pieforproviders/gems/rubocop-0.80.1/lib/rubocop/runner.rb:73:in `inspect_files'
/Users/katedonaldson/.rvm/gems/ruby-2.6.5@pieforproviders/gems/rubocop-0.80.1/lib/rubocop/runner.rb:39:in `run'
/Users/katedonaldson/.rvm/gems/ruby-2.6.5@pieforproviders/gems/rubocop-0.80.1/lib/rubocop/cli/command/execute_runner.rb:21:in `execute_runner'
/Users/katedonaldson/.rvm/gems/ruby-2.6.5@pieforproviders/gems/rubocop-0.80.1/lib/rubocop/cli/command/execute_runner.rb:13:in `run'
/Users/katedonaldson/.rvm/gems/ruby-2.6.5@pieforproviders/gems/rubocop-0.80.1/lib/rubocop/cli/command.rb:10:in `run'
/Users/katedonaldson/.rvm/gems/ruby-2.6.5@pieforproviders/gems/rubocop-0.80.1/lib/rubocop/cli/environment.rb:17:in `run'
/Users/katedonaldson/.rvm/gems/ruby-2.6.5@pieforproviders/gems/rubocop-0.80.1/lib/rubocop/cli.rb:65:in `run_command'
/Users/katedonaldson/.rvm/gems/ruby-2.6.5@pieforproviders/gems/rubocop-0.80.1/lib/rubocop/cli.rb:72:in `execute_runners'
/Users/katedonaldson/.rvm/gems/ruby-2.6.5@pieforproviders/gems/rubocop-0.80.1/lib/rubocop/cli.rb:41:in `run'
/Users/katedonaldson/.rvm/gems/ruby-2.6.5@pieforproviders/gems/rubocop-0.80.1/exe/rubocop:13:in `block in <top (required)>'
/Users/katedonaldson/.rvm/rubies/ruby-2.6.5/lib/ruby/2.6.0/benchmark.rb:308:in `realtime'
/Users/katedonaldson/.rvm/gems/ruby-2.6.5@pieforproviders/gems/rubocop-0.80.1/exe/rubocop:12:in `<top (required)>'
/Users/katedonaldson/.rvm/gems/ruby-2.6.5@pieforproviders/bin/rubocop:23:in `load'
/Users/katedonaldson/.rvm/gems/ruby-2.6.5@pieforproviders/bin/rubocop:23:in `<main>'
/Users/katedonaldson/.rvm/gems/ruby-2.6.5@pieforproviders/bin/ruby_executable_hooks:24:in `eval'
/Users/katedonaldson/.rvm/gems/ruby-2.6.5@pieforproviders/bin/ruby_executable_hooks:24:in `<main>'

The line that seems to throw the error is validates :email, presence: true, uniqueness: true in user.rb

# frozen_string_literal: true

# Application users
class User < ApplicationRecord
  # Handles UUIDs breaking ActiveRecord's usual ".first" and ".last" behavior
  self.implicit_order_column = 'created_at'

  has_many :businesses, dependent: :restrict_with_error

  validates :active, inclusion: { in: [true, false] }
  validates :email, presence: true, uniqueness: true
  validates :full_name, presence: true
  validates :language, presence: true
  validates :opt_in_email, inclusion: { in: [true, false] }
  validates :opt_in_phone, inclusion: { in: [true, false] }
  validates :opt_in_text, inclusion: { in: [true, false] }
  validates :service_agreement_accepted, inclusion: { in: [true, false] }
  validates :timezone, presence: true

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

  # format phone numbers - remove any non-digit characters
  def phone=(value)
    super(value.blank? ? nil : value.gsub(/[^\d]/, ''))
  end
end

Here's my .rubocop.yml:

require: rubocop-rails

AllCops:
  Exclude:
    - db/**/**
    - bin/**
    - Guardfile
    - vendor/**/*

Naming/FileName:
  Exclude:
    - config/initializers/**

Metrics/BlockLength:
  Exclude:
    - spec/**/**
    - lib/tasks/**

Layout/LineLength:
  Max: 180

Rails:
  Enabled: true

Style/ClassAndModuleChildren:
  EnforcedStyle: compact
  Exclude:
    - config/application.rb

Style/Encoding:
  Enabled: false

Style/HashEachMethods:
  Enabled: true

Style/HashTransformKeys:
  Enabled: true

Style/HashTransformValues:
  Enabled: true

RuboCop version

0.80.1 (using Parser 2.7.0.5, running on ruby 2.6.5 x86_64-darwin19)

[koic]

I think this error has been probably resolved by #214. Can you upgrade RuboCop Rails to 2.5.1?
https://rubygems.org/gems/rubocop-rails/versions/2.5.1

[katelovescode]

Yep, that did it! Thank you very much!