# How to add a migration with a plugin? **URL:** \ **Category:** Rails\ **Created:** [May 25, 2006, 3:36pm UTC](https://www.ruby-forum.com/t/how-to-add-a-migration-with-a-plugin/61605 "2006-05-25T15:36:09Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![Berin\_L](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/b/e95f7d/32.png) [@Berin\_L](https://www.ruby-forum.com/u/Berin_L)\ **Post date:** [May 25, 2006, 3:36pm UTC](https://www.ruby-forum.com/t/how-to-add-a-migration-with-a-plugin/61605/1 "2006-05-25T15:36:09Z")
I’m working on a plugin that requires some database support to do its job (adding a model or two). I’d like the plugin to automatically add a migration once it is installed. Is there already a mechanism for this? If so, how do you do it? – _Berin L._ Owner _Work:_ 571-215-7708 _Email:_ removed\_email\_address@domain.invalid [mailto:removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) _IM:_ removed\_email\_address@domain.invalid (MSN) \*[http://www.linkedin.com/in/bloritsch](http://www.linkedin.com/in/bloritsch) \* - - ``` *D-Haven* ``` 20044 Great Falls Forest Dr. [http://maps.google.com/maps?q=20044+Great+Falls+Forest+Dr.%2CGreat+Falls%2CVA+22066%2CUSA&hl=en](http://maps.google.com/maps?q=20044+Great+Falls+Forest+Dr.%2CGreat+Falls%2CVA+22066%2CUSA&hl=en) Great Falls, VA 22066 USA See who we know in common [http://www.linkedin.com/e/wwk/5678360/](http://www.linkedin.com/e/wwk/5678360/) Want a signature like this? [http://www.linkedin.com/e/sig/5678360/](http://www.linkedin.com/e/sig/5678360/) ---
**Author:** ![Berin\_L](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/b/e95f7d/32.png) [@Berin\_L](https://www.ruby-forum.com/u/Berin_L)\ **Post date:** [May 25, 2006, 7:47pm UTC](https://www.ruby-forum.com/t/how-to-add-a-migration-with-a-plugin/61605/2 "2006-05-25T19:47:08Z")
On Thursday, May 25, 2006, at 9:34 AM, Berin L. wrote: > _Email:_ removed\_email\_address@domain.invalid [mailto:removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) > See who we know in common [http://www.linkedin.com/e/wwk/5678360/](http://www.linkedin.com/e/wwk/5678360/) Want > a signature like this? [http://www.linkedin.com/e/sig/5678360/](http://www.linkedin.com/e/sig/5678360/) > > * * * > > Rails mailing list > removed\_email\_address@domain.invalid > [http://lists.rubyonrails.org/mailman/listinfo/rails](http://lists.rubyonrails.org/mailman/listinfo/rails) Plugins will call files name ‘install.eb’ when installed. I wouldn’t force it to run the migration, but you could have it generate a message telling the user to run a custom rake task. \_Kevin ---
**Author:** ![Berin\_L](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/b/e95f7d/32.png) [@Berin\_L](https://www.ruby-forum.com/u/Berin_L)\ **Post date:** [May 26, 2006, 5:19am UTC](https://www.ruby-forum.com/t/how-to-add-a-migration-with-a-plugin/61605/3 "2006-05-26T05:19:57Z")
Kevin O. wrote: > My interest is in generating the migration automatically. I leave it to the user to execute the ‘rake migrate’ command. So if I call the “generate migration” script using install.rb and then populate the contents with what I have, everything will be good? Of course, the question is how do I know the exact filename? Does generate migration provide any feedback I can parse for that purpose? ---
**Author:** ![Berin\_L](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/b/e95f7d/32.png) [@Berin\_L](https://www.ruby-forum.com/u/Berin_L)\ **Post date:** [May 25, 2006, 9:57pm UTC](https://www.ruby-forum.com/t/how-to-add-a-migration-with-a-plugin/61605/4 "2006-05-25T21:57:46Z")
On May 25, 2006, at 10:42 AM, Kevin O. wrote: > > _Berin L._ > > maps?q=20044+Great+Falls+Forest+Dr.%2CGreat+Falls%2CVA+22066% > > \_Kevin ``` You might want to have a look at the acts_as_authenticated plugin. ``` It uses a simple generator to create a migration. So after you install the plugin, you can run a script/generate command to have it generate the migration file. Cheers- -Ezra ---
**Author:** ![Berin\_L](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/b/e95f7d/32.png) [@Berin\_L](https://www.ruby-forum.com/u/Berin_L)\ **Post date:** [May 26, 2006, 3:10pm UTC](https://www.ruby-forum.com/t/how-to-add-a-migration-with-a-plugin/61605/5 "2006-05-26T15:10:40Z")
On Thursday, May 25, 2006, at 11:17 PM, Berin L. wrote: > > telling the user to run a custom rake task. > > * * * > > Rails mailing list > removed\_email\_address@domain.invalid > [http://lists.rubyonrails.org/mailman/listinfo/rails](http://lists.rubyonrails.org/mailman/listinfo/rails) Your approach sounds reasonable, your migration should be the highest numbered migration, and you should probably know the name part of the filename. \_Kevin