StackOverflow2013

Note that there are some explanatory texts on larger screens.

plurals

PO
text
Body
copied!<p>There are a few ways to approach it, but the logic certainly does not belong in the view. You have the various models associated with one another in a clear hierarchy with the top of the hierarchy being the House model, if I am reading your description correctly. That being the case, I would add an appropriate method of set of methods to the House model that may be composed of calls to calculation methods in the Room models associated with a given House instance and on down the line of association. That ways the relevant calculation can be performed at each level and through composing one or more methods at the House model level you are able to have a clean, expressive and maintainable way to deal with calculations.</p> <p>One thing to do, as well, would be to make sure that any calculations that can be performed by the DB are. For example, if there is a calculation that a Room model can do by simply querying it's own data then by all means push that computational burden to the DB using the ability of ActiveRecord to invoke such lower level calculation logic. Check out the <a href="http://ar.rubyonrails.org/classes/ActiveRecord/Calculations/ClassMethods.html" rel="noreferrer">API docs</a> for the details.</p> <p>I would look very carefully at the logic you want and see how it can be pushed into the model since that is probably where it belongs, close to the actual data of the calculations, and within the class structures that represent that data specifically; I would not create a model just to handle the calculation logic unless you really need to store the calculations persistently for some reason.</p>

Querying!

Guidance

An individual column

Larger individual text columns get their own page to allow for proper reading.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload