First, it's standard practice to use [polymorphic
tags](http://cookbook.hobocentral.net/manual/dryml-guide#polymorphic_tags)
rather than defining a render method on your model object. OTOH,
sometimes it is reasonable to define a method on the model object: the
"name" method is a reasonable example here.
I see a couple of options:
1) STI, aka Single Table Inheritance. This means that a single
database table holds all the attributes for all of the different types
of objects, and one column is used to hold the "type". This generally
just means that some columns are unused in some objects. See
http://cookbook.hobocentral.net/recipes/23-using-single-table-inheritance-sti-models
for a recipe on how to use STI. (Note that there may be an issue using
STI with Hobo on Ruby 1.9.2 -- Ruby 1.8.7 works.)
2) rather than "has_many reviews", you can just use:
has_many :amazon_reviews
has_many :yelp_reviews
def reviews
amazon_reviews+yelp_reviews
end
then <collection:reviews> will automagically do the right thing and
correctly display the correct card for each review.
Bryan
On 10-11-12 02:48 PM, Peter Booth wrote:
I'm wondering if there's a Right Way to do the following in Hobo/Rails?
I'm working on an application that will list (aggregate) a collection of
dissimilar objects that are rendered differently depending on their type.
Specifically the objects are product reviews, where some might have one or more
numeric scores, comments, stars. Some objects might summarize reviews (average
4.56 of 7 reviews). The appropriate formatting will depend on the review source.
So I first thought product has_many reviews, where a review is an object that
has a render method, but actually there would be many review types, with
different implementations of render().
I'm wondering whether each of these objects should in fact be different hobo
models, or if there is any reason to hide this?
I hope this explanation makes sense
Sent from my iPhone
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