February 11, 2018

How to Change Primary Keys in Ecto

73

clicks

How to Change Primary Keys in Ecto

Source: niallburkley.com

Ecto Phoenix Framework

The article authored by Niall Burkley offers a detailed guide on how to change the primary key of a database table in a Phoenix project by using Ecto. It begins by describing the original state of a sample `books` table that uses an ISBN string as the primary key. The goal is to change this to a serial datatype while creating a new `isbn` column for the old primary key values. The process involves multiple steps including adding new columns, copying existing ID values, swapping to the new primary key, renaming the primary key, and adding an index. The article emphasizes the importance of a methodical approach due to the constraints of relational databases. Finally, a complete migration example is provided in Elixir code.

Continue reading

Related posts

Integrating WebComponents with Phoenix LiveView

The article delves into using WebComponents within the Phoenix LiveView ecosystem to enhance UI capabilities. It discusses the challenges and benefits of combining server-side rendering with client-side components and offers practical examples and solutions for better integration.

Jun 11, 2024

Enhancing Ecto Schemas with the :source Option

John Curran discusses how to make boolean Ecto schema fields more readable by using the :source option to map to database columns.

Sep 01, 2023

Introduction of Phoenix Playground for Single-File Phoenix Applications

Wojtek Mach announces the release of Phoenix Playground, a new project that simplifies running single-file Phoenix applications, aimed to aid in prototyping, bug reporting, and sharing Phoenix code.

Jun 18, 2024

© HashMerge 2024