In daily web app development, we often need to check if two model objects are equal. When I first started using Rails, this is what I wrote:
Use obj1 == obj2 instead
Of course, that reflects my ignorance on learning the new tool.
So, here’s a proper way to compare if two model objects are equal:
What about new record?
Basically, a new model object only equals to itself:
Learning to use
== operator for checking model equality
is useful. Because now, we can start using other methods
that depend on
== operator. For instance,
Rails learning tests
You may notice the code examples are written as tests. This is my first Rails learning test. So the plan is to write more tests as a way to learn Rails. I will post them here occationally if interesting enough to share.
Source code: model_equality_test.rb