CODEWITHSUNDEEP
ruby-on-railsactiverecord
Leo
Leo

Reputation: 2103

method on activerecord::relation

So i do have a User model, on which i need by_posts method. by_post is intended to be executed on already browsed users, eg on 

users.where(name: "Jack")

I imagine this method as:

self.by_post(condition)
    return self if condition.blank?
    ##something
end

But right know when i return self like this, it returns a class, not a relation. So when i call this method on object such as:

    (byebug) users
    []
    (byebug) users.class
    ActiveRecord::Relation

what i get back after

users.by_post(nil)

is:

(byebug) users
User(id: integer, , username: string, email: string, created_at: datetime, updated_at: datetime etc

How can i make this method return the exact same object it begun with?

Upvotes: 1

Views: 692

Answers (2)

Klante
Klante

Reputation: 141

If you use the self.methodname it will be added the the User as a class method. 

User.by_post("jack")

If you want to call it on user instance skip the 'self.'

Like this

def by_post(condition)
    return self if condition.blank?
    ##something
end

Then you can use it like this

user = User.first
user.by_post("jack")

Upvotes: 0

Andrey Deineko
Andrey Deineko

Reputation: 52357

How can i make this method return the exact same object it begun with?

by_post method operates on the class (User), not on the relation, thus what you get is actually the "object it begun with" :)

So in order to return a relation from the by_post method, you'd want to load it:

self.by_post(condition)
    return self.all if condition.blank? # self.scoped for Rails 3
    ##something
end

Upvotes: 2

Related Questions