# How to create migration files?
**URL:** https://meta.discourse.org/t/how-to-create-migration-files/48991
**Category:** Development
**Created:** [8월 22, 2016, 10:55오전 UTC](https://meta.discourse.org/t/how-to-create-migration-files/48991 "2016-08-22T10:55:12Z")
**Posts on this page:** 7
**Page:** 1
### Author:  [@dachary](https://meta.discourse.org/u/dachary)
#### Post date: [8월 22, 2016, 10:55오전 UTC](https://meta.discourse.org/t/how-to-create-migration-files/48991/1 "2016-08-22T10:55:12Z")
I would like to create a new table (to store the graph for vote delegation). Should I create a migration file similar to **db/migrate/20120311170118\_create\_users.rb** manually ? Or is it enough to update the **== Schema Information** at the end of the model file ? I naively tried that and run **rake db:migrate** but it did not work 😉
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### Author:  [@Overgrow](https://meta.discourse.org/u/Overgrow)
#### Post date: [8월 22, 2016, 11:43오전 UTC](https://meta.discourse.org/t/how-to-create-migration-files/48991/2 "2016-08-22T11:43:22Z")
No, you need to create migrate file and run it with db:migrate (see [ActiveRecord docs](http://edgeguides.rubyonrails.org/active_record_migrations.html) )
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### Author:  [@Falco](https://meta.discourse.org/u/Falco)
#### Post date: [8월 22, 2016, 1:43오후 UTC](https://meta.discourse.org/t/how-to-create-migration-files/48991/3 "2016-08-22T13:43:38Z")
Note that if you are developing a plugin, discourse provides a PluginStore to help you avoid migrations, since undoing then when the plugin gets uinstalled is a open problem.
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### Author:  [@dachary](https://meta.discourse.org/u/dachary)
#### Post date: [8월 22, 2016, 1:49오후 UTC](https://meta.discourse.org/t/how-to-create-migration-files/48991/4 "2016-08-22T13:49:55Z")
> [@Overgrow](#):
>
> No, you need to create migrate file and run it with db:migrate
Thanks, I’m glad I did not miss something 🙂
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### Author:  [@dachary](https://meta.discourse.org/u/dachary)
#### Post date: [8월 22, 2016, 1:52오후 UTC](https://meta.discourse.org/t/how-to-create-migration-files/48991/5 "2016-08-22T13:52:41Z")
> [@Falco](#):
>
> discourse provides a PluginStore to help you avoid migrations
cool. Is there a plugin I could read to see how it’s used ? I found [something on rubydoc](http://www.rubydoc.info/github/discourse/discourse/PluginStore).
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### Author:  [@Falco](https://meta.discourse.org/u/Falco)
#### Post date: [8월 22, 2016, 1:59오후 UTC](https://meta.discourse.org/t/how-to-create-migration-files/48991/6 "2016-08-22T13:59:39Z")
Canned replies is recent and does it very clearly:
>
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### Author:  [@Overgrow](https://meta.discourse.org/u/Overgrow)
#### Post date: [8월 22, 2016, 2:41오후 UTC](https://meta.discourse.org/t/how-to-create-migration-files/48991/7 "2016-08-22T14:41:12Z")
> [@Falco](#):
>
> Note that if you are developing a plugin, discourse provides a PluginStore to help you avoid migrations, since undoing then when the plugin gets uinstalled is a open problem.
OK, thanks… I see …
