CODEWITHSUNDEEP
ruby-on-railsrubysortingruby-on-rails-4tags
Loenvpy
Loenvpy

Reputation: 919

Rails: find related records

I'm using act-as-taggable gem and want to sort similar article to a given article based on maximum similar tags, for example i have an article that i must show their related articles and is tagged with

([“awesome”, “cool”, "foo", "bar", "rails"])

and anothers tagged with

A1= ([“awesome”, “cool”, "foo", "bar", "rails"])

A2= ([“awesome”, “cool”, "foo", "bar", "python"])

A3= ([“awesome”, “cool”, "foo", "python", "django"])

in the sorting of related article A1 must be the first followed by A2 & finally A3 Howa can I achieve this

actually what i'm doing is @related_articles = Article.tagged_with(@article.tag_list, any: true) but this show all tags with only one similar tags so even if there is some articles with 5 or 4 similar tags they will not be first, the other solution is to use :match_all => true but if there is no article with all this tag the related article will be nil, So I'm wondering on how can i achieve this?

Upvotes: 1

Views: 141

Answers (1)

Nobita
Nobita

Reputation: 23713

I am not familiar with this gem, but you could do it this way. Assuming the main article you want to get similar articles from is named @article and its tags are accessible via @article.tag_list, you could do:

1 - Get all the articles that match any of the tags from @article:

@related_articles = Article.tagged_with(@article.tag_list, any: true)

2 - Sort them afterwards by doing:

@related_articles.sort_by { |ra| (ra.tag_list & @article.tag_list).size }.reverse

The key here is the & operator. Play with it on the console :)

Upvotes: 1

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