CODEWITHSUNDEEP
ruby-on-railsruby
Auxion
Auxion

Reputation: 13

Ruby on Rails: How to make a next/prev page button for post?

I need to make a next/prev button for a page that is listing posts (without gem). I want to limit it to 8 per page (newest to oldest). For the controller I have this:

def index
    @links = Link.order(created_at: :desc).limit(8).offset(@page * 8)
end

private
def set_page
    @page = params[:page] || 0
end

In the index.html.erb

<%= link_to 'Prev Page', page: -1.to_i %>
<%= link_to 'Next Page', page: +1.to_i %>

It listed 8 topics on the first page but when I click next page, its just a blank page. I followed this from another post but I'm not sure what I missed. Thanks

Upvotes: 1

Views: 494

Answers (1)

fool-dev
fool-dev

Reputation: 7777

Look, if you don't want use gem then follow the following code like in the controller 

before_action :set_page, only: [:index]
PAGE_SIZE = 8
def index
    @links = Link.order(created_at: :desc).offset(PAGE_SIZE * @page).limit(PAGE_SIZE)
end


private
def set_page
    @page = (params[:page] || 0).to_i
end

and in the view

<nav>
    <ul class="pager">
        <li class="previous <%= page == 0 ? 'disabled' : '' %>">
            <%= link_to_if page > 0, "&larr; Previous".html_safe, your_index_path(page: page - 1) %>
        </li>
        <li class="next">
            <%= link_to "Next &rarr;".html_safe, your_index_path(page: page + 1) %>
        </li>
    </ul>
</nav>

Upvotes: 3

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