It should actually just look like this:
class AddEnvironmentToHosts < ActiveRecord::Migration
def self.up
add_column :hosts, :environment, :string
end
def self.down
remove_column :hosts, :environment
end
end
The conditional code was for doing a bulk update on all the tables.
-Blake
On Jul 7, 2008, at 3:52 AM, Frank Sweetser wrote:
>
> I haven't done much with rails migrations, but shouldn't the
> "unless" in
> self.down be an "if"?
>
> Thom May wrote:
>> ---
>> .../rails/database/002_add_environment_to_host.rb | 13 ++++++++++
>> +++
>> 1 files changed, 13 insertions(+), 0 deletions(-)
>> create mode 100644 lib/puppet/rails/database/
>> 002_add_environment_to_host.rb
>>
>> diff --git a/lib/puppet/rails/database/
>> 002_add_environment_to_host.rb b/lib/puppet/rails/database/
>> 002_add_environment_to_host.rb
>> new file mode 100644
>> index 0000000..712265a
>> --- /dev/null
>> +++ b/lib/puppet/rails/database/002_add_environment_to_host.rb
>> @@ -0,0 +1,13 @@
>> +class AddEnvironmentToHost < ActiveRecord::Migration
>> + def self.up
>> + unless
>> ActiveRecord::Base.connection.columns("hosts").collect {|c|
>> c.name}.include?("created_at")
>> + add_column :hosts, :environment, :string
>> + end
>> + end
>> +
>> + def self.down
>> + unless
>> ActiveRecord::Base.connection.columns("hosts").collect {|c|
>> c.name}.include?("created_at")
>> + remove_column :hosts, :environment
>> + end
>> + end
>> +end
>
>
> --
> Frank Sweetser fs at wpi.edu | For every problem, there is a
> solution that
> WPI Senior Network Engineer | is simple, elegant, and wrong. - HL
> Mencken
> GPG fingerprint = 6174 1257 129E 0D21 D8D4 E8A3 8E39 29E3 E2E8
> 8CEC
>
> >
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