Adding Postgresql to an existing Rails project

Question

I'm following this guide, https://devcenter.heroku.com/articles/getting-started-with-rails5. I take out the 'sqlite3' gem and add 'pg', then run bundle install. Then I change my config/database.yml file to look like the following

config/database.yml

default: &default
  adapter: postgresql
  encoding: unicode
  pool: <%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %>

development:
  <<: *default
  database: myapp5_development

test:
  <<: *default
  database: myapp5_test

production:
  <<: *default
  database: myapp5_production
  username: myapp5
  password: <%= ENV['MYAPP_DATABASE_PASSWORD'] %>

For the next part, the guide gives me two choices and I have tried both. Installing this gem 'rails_12factor' or add the following code to my 'config/environments/production.rb' file

config/environments/production.rb

config.public_file_server.enabled =     ENV['RAILS_SERVE_STATIC_FILES'].present?

if ENV["RAILS_LOG_TO_STDOUT"].present?
  logger           = ActiveSupport::Logger.new(STDOUT)
  logger.formatter = config.log_formatter
  config.logger = ActiveSupport::TaggedLogging.new(logger)
end

Then if I run rake db:create followed by rake db:migrate it gives me errors so I run rake db:reset and that lets the migrations run through. If I start up my site I get the error

PG::UndefinedTable: ERROR:  relation "videos" does not exist
LINE 1: SELECT  "videos".* FROM "videos" ORDER BY "videos"."title" A...
                            ^
: SELECT  "videos".* FROM "videos" ORDER BY "videos"."title" ASC LIMIT $1 OFFSET $2
Extracted source (around line #2):

<div class="container">
<% @videos.each do |x| %>
<p> <div class="child">  
  <video controls width="310" height="230" src="<%= x.file %>"></video>
    <p> <%= x.title %> </p>

When I take a look at my tables through ActiveRecord::Base.connection.tables I see that videos exists.

["Videos", "ipaddresstrackers", "users", "votes", "schema_migrations", "ar_internal_metadata"]

Rename "Videos" to "videos". Postgresql is case sensitive for quoted names. More details: stackoverflow.com/questions/21796446/postgres-case-sensitivity — Pavel Mikhailyuk
– Pavel Mikhailyuk, Commented Mar 28, 2019 at 6:40
It was a case sensitive problem, thank you! If you would like to make this comment an answer I would gladly mark it as the right answer. — ChrisWilson
– ChrisWilson, Commented Mar 28, 2019 at 17:38

Community · Accepted Answer · 2020-06-20 09:12:55Z

1

Rename "Videos" table to "videos".

In PostgreSQL unquoted names are case-insensitive. Thus SELECT * FROM videos and SELECT * FROM ViDeOs are equivalent.

However, quoted names are case-sensitive. SELECT * FROM "videos" is not equivalent to SELECT * FROM "Videos".

More details here.

edited Jun 20, 2020 at 9:12

CommunityBot

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answered Mar 29, 2019 at 7:32

Pavel Mikhailyuk

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