Before you build your first app in Rails 6
rails aborted! ActiveRecord::InvalidForeignKey: PG::ForeignKeyViolation: ERROR: update or delete on table "users" violates foreign key constraint "fk_rails_03de2dc08c" on table "comments" DETAIL: Key (id)=(11) is still referenced from table "comments ...
Key (blob_id)=(13) is not present in table "active_storage_blobs" · Issue #37984 · rails/rails · GitHub
Database constraints
postgresql - How to ignore foreign key constraint to delete in hibernate/jpa - Stack Overflow
Cannot Delete or Update a Parent Row: A Foreign Key Constraint Fails: Solved
Rails 7 adds support for deferrable foreign key constraints in PostgreSQL | Saeloun Blog
SQL Server Foreign Key Update and Delete Rules
Add users table with unique & foreign key constraints in PostgreSQL - DEV Community 👩💻👨💻
ruby on rails - PG::ForeignKeyViolation: ERROR: update or delete on table and I don't know why in my case - Stack Overflow
prefer "dependent: destroy" in ruby/model or in postgres on delete cascade? : r/rails
Rails】外部キー追加におけるreference型の使用、未使用の違い。外部キー制約によるエラーをコンソールで確認してみた。 - Qiita
Active Record Associations — Ruby on Rails Guides
ruby on rails - Must a Foriegn Key Be Filled in a Row in a Related Table in a DB? - Stack Overflow
Data Integrity: Foreign Keys and Uniqueness Constraints
Chapter 8: Composite Keys and Domain-Key Normal Form | dan chak
SQLite INSERT, UPDATE, DELETE Query with Example
PG::UndefinedColumn」と言うエラーが出ました | Nanayaku blog
Zammad error in data privacy - Technical assistance - Zammad - Community
Chapter 8: Composite Keys and Domain-Key Normal Form | dan chak
postgres - truncate, refresh materialized view 暴力清空一个表ERROR: update or delete on table "" violates foreign key constraint ... - 申思维的技术站点-ruby/rails /titanium/敏捷方法论/测试驱动/自动化/全栈攻城狮/jquery/极客/直男
Zammad error in data privacy - Technical assistance - Zammad - Community
9 reasons why there are no foreign keys constraints in your database (referential integrity checks) - Dataedo Blog
postgresql - How can I show a flash notice message when I get PG::ForeignKeyViolation error in Rails - Stack Overflow
Rails】外部キー追加におけるreference型の使用、未使用の違い。外部キー制約によるエラーをコンソールで確認してみた。 - Qiita
postgresql - Violates foreign key constraint - Database Administrators Stack Exchange
