Question

I am currently attempting to build a model using Ruby on Rails. As of now, I am trying to separate posts based upon their ‘tags’ (which is a column in my posts model) – I want all ‘sports’ articles, for example, to pop up on a separate page. Tags are assigned to a post via text-field. However, I can’t seem to come to a conclusion as to how I’d be able to complete this task.

Here is some code I’ve tried out within my posts model:

def self.getTag
  find(:all, :include => params[:tags], :order => 'created_at DESC')
end

However, it seems as if params[:tags] is an invalid argument.

Answer 1

params is not available (and should not be used) in the model. Just pass a parameter to the model method:

# controller code
Model.getTag(params[:tags])

# model code
def self.getTag(tags)
  find(:all, :include => tags, :order => 'created_at DESC')
end