Post migration hooks
Reported by jonuts | June 23rd, 2009 @ 12:47 PM | in 0.10.0
Hey
I was looking for a good/easy/convenient way to populate tables with default data. Until now I have been using rake tasks, which I have assumed is the only way to do it. I came up with a solution to this problem, but I first was wondering if this really is a 'problem', or if this behavior belongs in a plugin instead, or if it exists already and I have missed it..
Here is an example of what I am talking about:
class Foo
include DataMapper::Resource
property :id, Serial
property :name, String
post_migration do
create :name => "Hello there"
end
end
Comments and changes to this ticket
-
Dan Kubb (dkubb) July 3rd, 2009 @ 02:58 AM
- State changed from “new” to “not-applicable”
I don't believe seed data belongs in the model. Typically I just follow the same convention defined in rails and make a "db:seed" task, and have that populate my database as needed. Of course you're free to write a plugin that does this, but I don't think it belongs in dm-core or dm-migrations.
-
jonuts July 3rd, 2009 @ 08:39 AM
That's sort of what I figured.
If anyone else is interested, I set this up as a plugin http://github.com/jonuts/dm-seed_data
-
Dan Kubb (dkubb) July 3rd, 2009 @ 12:20 PM
Actually, one thing that might be worth doing is integrating a rake db:seed task into merb_datamapper and rails_datamapper.
The style that Rails uses, which is what I tend to use in project, is just make a db:seed rake task that does load(Rails.root / 'db' / 'seeds.rb') and have it be responsible for creating the seed data.
I've found that the majority of the time I want to seed data from several models, with associations between the resources. Having the concens for one model in another's seed_data block seems like it could get more confusing as the seed data grows. I think it's better to group it all in one place, and allow the programmer to do whatever they like in the script.
-
jonuts July 5th, 2009 @ 12:59 AM
That's a good idea and quite a bit more useful. I'll take a look into it today.
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Dan Kubb (dkubb)
jonuts