How to add pagination in Kaminari

Question

How to add pagination to feed_entries in category?

I use kaminari, mongoid 4, rails 4

Category.rb

class Category
  def feed_entries
    FeedEntry.in(source_id: sources.map(&:id))
  end
end

show.html.erb

<% @category.feed_entries.includes(:source).each do |feed_entry| %>
  <%= link_to feed_entry.name, feed_entry %>
  <%= feed_entry.source.title %>
<% end %>

Models

class Category
  include Mongoid::Document
  field :name, type: String
  has_many :sources, dependent: :destroy
end

class FeedEntry
  include Mongoid::Document
  field :name, type: String
  belongs_to :source, touch: true
  validates :source_id, presence: true
end

class Source
  include Mongoid::Document
  field :title, type: String
  has_many :feed_entries, dependent: :destroy
  belongs_to :category, touch: true
end

Sonalkumar sute · Accepted Answer · 2015-02-18T11:15:09.730

0

Something like this should work

in you categories controller

 def show 
     @category = Category.find(params[:id]) 
     @feed_entries = @category.sources.includes(:feed_entries).page(params[:page])
 end

In view

<%= @feed_entries.each do |feed_entry| %>
  <%= link_to feed_entry.name, feed_entry %>
  <%= feed_entry.source.title %>
<% end %>
<%= paginate @feed_entries %>

edited Feb 18 '15 at 11:15

answered Feb 18 '15 at 10:55

Sonalkumar sute

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doesnt' work in category_controller.rb **undefined method `sources' for Category:Class** – Anton Ipatov Feb 18 '15 at 11:04
undefined method `sources' for Category:Class – Anton Ipatov Feb 18 '15 at 11:05
Sorry category was in small, my bad. Try now – Sonalkumar sute Feb 18 '15 at 11:08
same problem **NameError (undefined local variable or method `sources' for #): app/controllers/categories_controller.rb:11:in `show'** – Anton Ipatov Feb 18 '15 at 11:13
undefined method `source' – Anton Ipatov Feb 18 '15 at 11:40
In view right? but `feed_entry` should have `source`, check if feed_entry has `source_id` – Sonalkumar sute Feb 18 '15 at 12:23
doesn't work **ActionView::Template::Error (undefined method `name' for #):** – Anton Ipatov Feb 18 '15 at 13:00
@AntonIpatov - Please check the value of `@feed_entries` in the view, I think it's a source object there, if so you can try something like `feed_entry.feed_entries.first.name`, `feed_entry.title` or in controller try changing `@category.feed_entries.includes(:source).page(params[:page])` with this if we get `feed_entries` object in view rather than source object – Sonalkumar sute Feb 18 '15 at 13:11
Thank you all works with `@category.feed_entries.includes(:source).page(params[:page])` but how to add `sort_by(&:score_count).reverse` ? – Anton Ipatov Feb 18 '15 at 20:01
`@feed_entries = @category.feed_entries.includes(:source)` `@feed_entries.sort_by! { |value| value.score_count }` `@feed_entries = @feed_entries.page(params[:page])` you can try something like this – Sonalkumar sute Feb 19 '15 at 07:04

How to add pagination in Kaminari

1 Answers1