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我有一个本地 PSQL 数据库设置，并且在使 rake db:migrate 正常运行时遇到问题。例如，我的数据库已经将其 high_school 列名更改为 high_school_name，但 rake db:migrate 失败，状态显示如下：

up     20130307043554  Adding seo tables
up     20130307185401  Create admin notes
up     20130307185402  Move admin notes to comments
up     20130308160956  Add active flad to users
up     20130308214928  Add column public to users table
up     20130325203837  Add duration to videos
up     20130326171803  Update duration of videos
down    20130410145000  Fix high school name
up     20130410145028  Add high school id to users
up     20130410161705  Convert units for stats
up     20130410164209  ********** NO FILE **********
up     20130416142844  Add column coach id to users

为什么迁移顺序中间的迁移失败/被读取为“关闭”？这是错误：

Migrating to AddingSeoTables (20130307043554)
Migrating to CreateAdminNotes (20130307185401)
Migrating to MoveAdminNotesToComments (20130307185402)
Migrating to AddActiveFladToUsers (20130308160956)
Migrating to AddColumnPublicToUsersTable (20130308214928)
Migrating to AddDurationToVideos (20130325203837)
Migrating to UpdateDurationOfVideos (20130326171803)
Migrating to FixHighSchoolName (20130410145000)
(0.1ms)  BEGIN
==  FixHighSchoolName: migrating ==============================================
-- rename_column(:users, :high_school, :high_school_name)
(0.4ms)  ALTER TABLE "users" RENAME COLUMN "high_school" TO "high_school_name"
PG::Error: ERROR:  column "high_school" does not exist
: ALTER TABLE "users" RENAME COLUMN "high_school" TO "high_school_name"
(0.1ms)  ROLLBACK
rake aborted!
An error has occurred, this and all later migrations canceled:

PG::Error: ERROR:  column "high_school" does not exist
: ALTER TABLE "users" RENAME COLUMN "high_school" TO "high_school_name"

显然，存在架构问题或其他问题。Schema 是通过远程分支跟踪的，所以我不知道问题出在哪里。

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2 回答 2

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我怀疑 down 无法正确处理列重命名更改，除非只是添加或删除列。

您可能希望考虑的一种选择实际上是使用 SQL 更改名称。例如，如果要更改high_school为的迁移high_school_name失败并且数据库本身当前具有high_school_name，则将其（在 SQL 中）重命名为high_school，然后尝试运行迁移。这可能是您的一种选择。

于 2013-04-16T20:18:04.463 回答
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在重命名列的行的末尾添加 resque nil

于 2013-04-16T20:18:35.557 回答