Обновляем конфиг БД

Gemfile

@@ -8,7 +8,7 @@ gemspec
 gem 'appraisal'
 
 gem 'fastimage'
-gem 'sqlite3'
+gem 'pg', '~> 1.1.4'
 
 gem 'aws-sdk-s3'
 gem 'fog-local'

gemfiles/rails_52.gemfile

@@ -4,7 +4,7 @@ source "https://rubygems.org"
 
 gem "appraisal"
 gem "fastimage"
-gem "sqlite3"
+gem "pg", "~> 1.1.4"
 gem "aws-sdk-s3"
 gem "fog-local"
 gem "delayed_paperclip", git: "https://github.com/insales/delayed_paperclip.git"

test/database.yml

@@ -1,4 +1,7 @@
 test:
-  adapter: sqlite3
-  database: ":memory:"
-
+  adapter: postgresql
+  host: 127.0.0.1
+  database: paperclip_test
+  encoding: utf8
+  username: postgres
+  port: 5432

test/test_helper.rb

@@ -7,7 +7,7 @@ require 'mocha/test_unit'
 require 'pry'
 require 'pry-byebug'
 require 'tempfile'
-require 'sqlite3'
+require 'pg'
 
 require 'active_record'
 require 'active_support'