> I stumbled upon the same problem the other day when I migrated our
> server. I have created a merge request
> https://gitorious.org/gitorious/mainline/merge_requests/220 that
> should fix the migration (once the MR is completely created, which is
> taking unusually long...) Otherwise you can find the actual change in
> my clone of Gitorious here:
> https://gitorious.org/~saur/gitorious/saurs-mainline/commit/edaebc812...
> <https://gitorious.org/%7Esaur/gitorious/saurs-mainline/commit/edaebc8...>

> The problem for you, however, is that you will have to revert the part
> of the failed migration that actually took place before you can apply
> the corrected version (unless you can revert using backups). You will
> have to remove the content_type column from the project_memberships table.

> //Peter

> *From:*gitorious@googlegroups.com [mailto:gitorious@googlegroups.com]
> *On Behalf Of *Rodrig Lima
> *Sent:* 30 October 2012 14:03
> *To:* gitorious@googlegroups.com
> *Subject:* [gitorious] rake db:migrate error

> Hi all,

> This is my error:

> git@maverick:~$ pwd

> /var/www/gitorious

> git@maverick:~$ bundle exec rake db:migrate

> .

> .

> .

> ==  AddProjectMemberships: migrating
> ==========================================

> -- create_table(:project_memberships)

>    -> 0.0043s

> -- add_index(:project_memberships, [:project_id, :member_id,
> :member_type], {:name=>"project_memberships_index"})

>    -> 0.0062s

> ==  AddProjectMemberships: migrated (0.0110s)
> =================================

> ==  MakeProjectMembershipPolymorphicOnSubject: migrating
> ======================

> -- add_column(:project_memberships, :content_type, :string)

>    -> 0.0062s

> rake aborted!

> An error has occurred, all later migrations canceled:

> Mysql::Error: Table 'gitorious_production.content_memberships' doesn't
> exist: SELECT * FROM `content_memberships`

> (See full trace by running task with --trace)

> =======================================================

> *with --trace*

> *git@maverick:~$ bundle exec rake db:migrate --trace*

> *(in /var/www/gitorious)*

> *** Invoke db:migrate (first_time)*

> *** Invoke environment (first_time)*

> *** Execute environment*

> *** Execute db:migrate*

> *==  MakeProjectMembershipPolymorphicOnSubject: migrating
> ======================*

> *-- add_column(:project_memberships, :content_type, :string)*

> *rake aborted!*

> *An error has occurred, all later migrations canceled:*

> **

> *Mysql::Error: Duplicate column name 'content_type': ALTER TABLE
> `project_memberships` ADD `content_type` varchar(255)*

> **

> I'm following this steps:
> http://gitorious.org/gitorious/pages/DebianSqueezeInstallation

> How can I fix it?

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