Schema.rb is an artifact of running the migrations. You never edit it (as it mentions in the first line or so) directly.
If you haven't already, please take a couple of days and work all the way through the (free to use online) http://railstutorial.org program. It will make so much more sense once you've done that.
> On Apr 7, 2017, at 7:17 PM, fugee ohu <firstname.lastname@example.org> wrote:
> I dunno, your answer confuses me for now What's a migration file have to do with schema.rb ?
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