CODEWITHSUNDEEP
ruby-on-railsruby-on-rails-3hashtag
Amy Brown
Amy Brown

Reputation: 117

how to extract hashtags and display them groups by descending dates? (ruby on rails)

I created a new model called 'hashtags' and a new table in my database

Here's the schema.db

create_table "hashtags", :force => true do |t|
    t.string   "hashtags"
    t.integer  "post_id"
    t.datetime "created_at",   :null => false
    t.datetime "updated_at",   :null => false
  end

hashtags.rb

class Hashtags < ActiveRecord::Base
  attr_accessible :hashtags, :post_id
end


def create
  hashtag_regex = /\b#\w\w+/
  @post = current_user.posts.build(params[:post])
  @post.hashtags = @post.text.scan(hashtag_regex)
end

Inside the post model, this is what I've added

class Post < ActiveRecord::Base
  attr_accessible :content
  belongs_to :user
  has_many :hashtags, dependent: :destroy

For all posts where there's a hashtag (or could be 2+ hashtags), I want to list them in descending order by date in a new page called '/hashtags'. So this is how I want it to show in view

4/30/2013
#tag3 #tag2 by user2
#tag1 by user5

4/29/2013
#tagz by user10
#tagx #tagy by user3

4/25/2013
#tagz #tagy #tagx by user2

Inside views\static_pages\hashtags.html.erb

I'm trying to create this view, but how could I best go about this?

Upvotes: 0

Views: 855

Answers (2)

Asher Namanya
Asher Namanya

Reputation: 27

This is how you would dot it in your Model: For

class Post < ApplicationRecord
 has_many :hashtags, dependent: :destroy
 after_commit :process_hashtags

def process_hashtags
    hashtag_regex = (/#\w+/)       
    text_hashtags = content.to_s.scan(hashtag_regex)       
    text_hashtags.each do |name| 
        HashTag.create name: name, address: user.country       
    end      
    end
 end

Model for # for hashTags

class HashTag < ApplicationRecord
 
  belongs_to :post

end

Upvotes: 0

AlexBrand
AlexBrand

Reputation: 12429

To save the hash tags you need a before save callback method, and get rid of that logic in the controller.

class Post < ActiveRecord::Base

    after_save :process_hashtags

    def process_hashtags
       hashtag_regex = /\B#\w\w+/
       text_hashtags = text.scan(hashtag_regex)
       text_hashtags.each do |tag|
         hashtags.create name: tag
       end
     end
end

This callback will iterate through the array of hashtags that it finds in the text, and create a Hashtag model and associate it with the Post model.

Let me know if it works, as it might need some adjustments.

Upvotes: 0

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