ruby-on-rails - Rails 没有为新记录分配唯一 ID

Question

今天早上我使用 db:seed:dump 恢复了一个数据库.现在，在尝试运行一个简单的 rake 文件后，我收到了以下错误。

ActiveRecord::RecordNotUnique: PG::UniqueViolation: ERROR:  duplicate key value violates unique constraint "reports_pkey"
DETAIL:  Key (id)=(1) already exists.
: INSERT INTO "reports" ("worker_id", "report_month", "status", "created_at", "updated_at") VALUES ($1, $2, $3, $4, $5) RETURNING "id"
/path/to/app/dir/lib/tasks/produce.rake:22:in `block (3 levels) in <top (required)>'
/path/to/app/dir/lib/tasks/produce.rake:17:in `each'
/path/to/app/dir/lib/tasks/produce.rake:17:in `block (2 levels) in <top (required)>'

Caused by:
PG::UniqueViolation: ERROR:  duplicate key value violates unique constraint "reports_pkey"
DETAIL:  Key (id)=(1) already exists.
/path/to/app/dir/lib/tasks/produce.rake:22:in `block (3 levels) in <top (required)>'
/path/to/app/dir/lib/tasks/produce.rake:17:in `each'
/path/to/app/dir/lib/tasks/produce.rake:17:in `block (2 levels) in <top (required)>'
Tasks: TOP => produce:report_month
(See full trace by running task with --trace)

我之前已经多次运行这个 rake 任务，没有错误，唯一的区别是我最近部署了一个备份。

阅读错误，似乎 Rails 正在尝试将 ID 间隔重新启动回到 1，该间隔已被占用。

seed:dump gem 创建一个 seeds.rb 文件，其结构如下:

Note.create!([
  {id: 1, notable_id: 51, notable_type: "Worker", body: "Some sort of text here", created_at: "2017-10-27 00:27:21", updated_at: "2017-10-27 00:27:21"},
  {id: 2, notable_id: 68, notable_type: "Worker", body: "another note", created_at: "2017-11-11 18:43:13", updated_at: "2017-11-11 18:43:13"}
])

有没有人遇到过这个？知道如何解决吗？

Answer 1

回答:不要使用 db:seed:dump gem 进行数据库备份。至少不是我使用它的方式。

我最终从通过 pg_dump 命令创建的早期备份中恢复。

感谢所有评论者