rails migration
如果Migration 寫錯，只要修改後再重新執行 rails db:migrate 指令就行了。 什麼是Migration. Migration 是用來描述「資料庫的架構長什麼樣子」的檔案，它會隨著專案 ... ,The rails commands that manipulate migrations and your schema. ... This migration adds a table called products with a string column called name and a text ...
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 rails migration 相關參考資料
Ruby on Rails 實戰聖經| Active Record - 資料庫遷移(Migration)
Migrations 會自動追蹤哪些變更已經執行過了、那些還沒有，你只要新增Migration 檔案，然後執行rake db:migrate 就搞定了。它會自己搞清楚該跑哪些migrations，如此 ... https://ihower.tw Model Migration 為你自己學Ruby on Rails | 高見龍 - railsbook.tw
如果Migration 寫錯，只要修改後再重新執行 rails db:migrate 指令就行了。 什麼是Migration. Migration 是用來描述「資料庫的架構長什麼樣子」的檔案，它會隨著專案 ... https://railsbook.tw Active Record Migrations — Ruby on Rails Guides
The rails commands that manipulate migrations and your schema. ... This migration adds a table called products with a string column called name and a text ... https://guides.rubyonrails.org Migrations - Ruby on Rails Guides
When Bob runs rake db:migrate, Rails knows that it has not run Alice's two migrations so it executes the up method for each migration. Of course this is no ... https://guides.rubyonrails.org Active Record Migrations - Rails Edge Guides - Ruby on Rails
Migrations are a feature of Active Record that allows you to evolve your database schema over time. Rather than write schema modifications in pure SQL, ... https://edgeguides.rubyonrails Ruby on Rails-談Migration概念與用法- 張凱喬- Medium
在一開始學Rails時一定經歷過 rails generate model user rails db:migrate 然後根本搞不懂migration在搞屁. 基本上migration並不代表資料庫. https://medium.com Active Record 遷移— Ruby on Rails 指南
Migration，遷移。Active Record 眾多功能之一，可與時俱進的管理資料庫綱要。最棒的是遷移提供了簡潔的Ruby DSL，無需寫純SQL，便能變更資料表。 讀完本篇，您 ... https://rails.ruby.tw Ruby on Rails Guides: Migrations（資料庫遷移）
所以，您只要更新手頭的原始碼，然後執行rake db:migrate，其餘的就交給Active Record，它會自己搞懂該跑哪些migrations。還有，它也會更新db/schema.rb 檔案，以 ... https://guides.ruby.tw |