Kaminari error when collection is smaller than per(x)

Question

I am running the Kaminari gem for my pagination.

Controller

def dashboard
  @projects = Project.find_by_user_id(current_user)
  if @projects.size > 10
    @projects.page(params[:page]).per(10)
  end
end

Dashboard view

= paginate @projects, :theme => 'twitter-bootstrap-3', :remote => true

In my case, the @projects is sometimes only 1 record or even zero records. When it is nil, I get an error on the params[:page] being nil.

So this works

def dashboard
  @projects = Project.page(params[:page]).per(10)
end

This gets error undefined method 'page' for #<Project:0x007f8cac5f14b0>

  def dashboard
    @projects = Project.find_by_user_id(current_user).page(params[:page]).per(10)
  end

I think it is because the @projects is only a couple of records which is less than the 10 specified in .per

I tried adding a @projects.count or @projects.size but I get the error undefined method 'size' for #<Project:0x007f8c996865f0>

def dashboard
  @projects = Project.find_by_user_id(current_user)
  if @projects.size > 10
    @projects.page(params[:page]).per(10)
  end
end

What the hell am I doing wrong!? haha

I am guessing I can fix this in the first instance instead of trying to fix the second or third options. Any help would be greatly appreciated.

Answer 1

The issue is Project.find_by_user_id(current_user) returns an Array, not an ActiveRecord::Relation

You should do something like:

current_user.projects.page(params[:page]).per(10)

If your relationships are correctly setup.

Or:

Project.where(user_id: current_user.id).page(params[:page]).per(10)