Install Mongo before you need to remove all the active record related entries from application.rb and config/initializers/*
Step1 Remove database adapter gems from your Gemfile
install in Gemfile gem 'sqlite3'
Step2 Remove require ‘rails/all’ and Add below
#require 'rails/all'
require "action_controller/railtie"
require "action_mailer/railtie"
require "sprockets/railtie"
require `"rails/test_unit/railtie"`
Step3 Delete database.ym , schema.rb and all the migrations
Step4 Delete migration checks from test/test_helper.rb
Step5 Delete all activerecord related configuration from config/environments
# config.active_record.migration_error = :page_load
in config/environments/production.rb setting # config.active_record.dump_schema_after_migration = false
Install Mongoid Use gemfile
in Gemfile gem 'mongoid', '~> 6.1.0'
User rails g mongoid:config create config/initializers/mongoid.rband Add below
Mongoid.load!(File.expand_path("config/mongoid.yml", Dir.pwd))
in application.rb setting
config.generators do |g|
g.orm :mongoid
end
注意如果Rails 5.1.1 版本使用rails c接著使用query User.all.count當掉或是掛掉請降版本
Ralis 版本降到4.2.7 mongoid降到4.0.0 Ruby版本降到 2.2.3
mongodb安裝按照下列步驟使用
Step1. brew install mongodb使用homebrew安裝mongodb
Step2. mongod啟動mongoDB
Step3. sudo mkdir -p /data/db創建文件(用來存放 Mongo DB資料所使用)
Step4. mongod --dbpath ~/data/db將Mongo DB資料存放在此目錄底下
如果發現無法連線到MongoDB請先確認是否有開啟MongoDB而且MongoDB dbpath指向哪邊
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