Rails looking for MySQL instead of Postgres after MYSql installation

Question

I was using postgresql with rails. I installed mysql yesterday for some side project and today when I ran rails c, It gave the following error,

home/rahul/.rvm/gems/ruby-2.6.0/gems/arel-9.0.0/lib/arel/visitors.rb:7:in require': cannot load such file -- arel/visitors/mysql (LoadError)

I have not changed anything in my rails project. My rails application still uses Postgres

database.yml

default: &default
  adapter: postgresql
  pool: 50
  timeout: 5000
  # host: localhost
  encoding: utf8
development:
  <<: *default
  database: enquiry_dispatch_development
test:
  <<: *default
  database: enquiry_dispatch_test

How does your config/database.yml look like (without password!)? Did you replace pg with mysql2 in your Gemfile and run bundle install? — spickermann
– spickermann, Commented Feb 4, 2019 at 11:58
@spickermann, I have put my database.yml in question. And no, my Gemfile contains pg and not mysql2 — Rahul Ahuja
– Rahul Ahuja, Commented Feb 4, 2019 at 12:06
please check in application if somewhere is written require 'mysql' or 'mysql2' — chaitanya
– chaitanya, Commented Feb 4, 2019 at 12:32
No. As I said earlier, my rails application used postgresql from the beginning and nothing has been changed in it. — Rahul Ahuja
– Rahul Ahuja, Commented Feb 4, 2019 at 12:35

Gleb A. · Accepted Answer · 2019-05-24 17:39:34Z

3

Hello just remove the gem 'arel'

gem uninstall arel

and run

bundle install

edited May 24, 2019 at 17:39

Gleb A.

1,17015 silver badges25 bronze badges

answered May 24, 2019 at 15:23

2cats2furious

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