Question

Suppose I have a method in a controller:

 def my_find(is_published, count)
    items = Idea.where(published: is_published)
    #......
 end

Sometimes I want to pass some extra filter arguments

 def my_find(is_published, count, some_extra_filter = nil)
    items = Idea.where(published: is_published) #.where (some_extra_filter)
    #......
 end

where some_extra_filter can be lambda or just an plain sql “where” string and it can also be nil or “”.

So how do I concatenate .where(published: is_published) with where (some_extra_filter) to get what I need?

Answer 1

This is actually very easy using scopes:

def my_find
  @items = Idea.scoped
  @items = @items.where(published: is_published) unless is_published.nil?
  @items = @items.where(other: other_param) if other_params < 10
  # etc, etc
end