Databases
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    <p>One possibility to consider: making destructive (i.e. one-way, non-reversible) changes to your model may be problematic for reasons beyond inhibiting your ability to provide this beta functionality. For example, it may difficult to backout from a change if you have a problem during the migration.</p> <p>Instead, I would recommend looking at ways to only add to the model: add columns while leaving old columns in place for backward compatibility, version stored procedures if you're using them, etc. If you need to alter column data types, instead create a new column of the target data type, then have your migration also copy existing rows data from the old column to the new column in the new format. You can then perform your database migration in your test environment and confirm that both the old and new versions of the application continue to work with the database changes.</p> <p>One potential way to serve up multiple versions of your application is to use an alternative respond_to format for your beta site. You could create a method in your ApplicationController to check if the user was in the beta. If true, you can override the request.format value and in your respond_to block have a "format.beta" type response.</p> <p>The challenge with this approach is the controller logic. Without embedding some kind of switching logic within your controller methods, you won't have a way of altering the controller code path. This may not be a major problem, depending on how many controller changes you have.</p> <p>(By the way, it looks like we have very similar names! :-) )</p>
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    1. POHow do I offer a beta feature to select users? (rails)
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    1. USChris Hart
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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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