Question

I have 2 queries that are very different:

Model.where(:a => '1', b => '2', c => '3', d => '4')
Model.where(:e => '5', f => '6')

Is it a good (or valid) practice to get the union the results as follows?

models = Model.where(:a => '1', b => '2', c => '3', d => '4')
models += Model.where(:e => '5', f => '6')

Working in Rails 3.07. This is not the actual query. It is simplified for the example.

EDIT:
Sorry, I was not explicit. The goal is to get the union (the sum of results).

Answer 1

In the event that there is overlap in the two result sets, you may get duplicate values. Try the pipe operator instead:

models = Model.where(:a => '1', b => '2', c => '3', d => '4') | Model.where(:e => '5', f => '6')