Rails/UniqueValidationWithoutIndex String/Symbol discrepancy

[baarkerlounger]

Given a model:

class Account < ApplicationRecord
  validates "some_field", uniqueness: true
end

and a schema.rb:

  enable_extension "plpgsql"

  create_table "accounts", force: :cascade do |t|
    t.string "name"
    t.datetime "created_at", null: false
    t.datetime "updated_at", null: false
    t.integer "some_field"
    t.index ["some_field"], name: "some_field_index", unique: true
  end

Rubocop passes.

But changing the model validation to use a symbol rather than a string:

validates :some_field, uniqueness: true

It fails with:

C: Rails/UniqueValidationWithoutIndex: Uniqueness validation should be with a unique index

I would expect both of those to produce the same result.

RuboCop version

0.80.1 (using Parser 2.7.0.5, running on ruby 2.7.0 x86_64-darwin19)

Rails version

6.0.2.2

Ruby version

2.7.0 This appears to work as expected on Ruby 2.7.1

[koic]

I cannot reproduce this issue.
RuboCop Rails 2.5.1 has been released. Will updating to RuboCop 2.5.1 reproduce the issue?
https://github.com/rubocop-hq/rubocop-rails/releases/tag/v2.5.1

[baarkerlounger]

Turns out the issue actually has nothing to do with Symbols/Strings it's just changing the file at all that does it.

This is actually a duplicate of #227 so will close it.