Do your users want to add food, drinks, books, movies, and many other stuff to favorites?
— How should I name this table — users_foods or foods_users?
— Damn, I forget to add
:id => false to migration again!
— Holy sh*t! I have to create a lot of tables for this relations!
Nope, you don't have to create relations or think about migrations — markable will handle this.
Should your users be able to add each other to friends? Or do you want to make a twitter-like followers system?
— Oh… Self-relation again…
Nope, markable can handle it too!
Add to your Gemfile
bundle install rails generate markable:migration rake db:migrate
At first you should define markers — these are models which will mark other models.
If User can mark Food as favorite, then User — is a marker.
class User < ActiveRecord::Base acts_as_marker end
Then you should define markables
class Food < ActiveRecord::Base markable_as :favorite end
Thats it! Now you can mark pizza as a favorite food of your user
user.set_mark :favorite, pizza # or user.mark_as_favorite pizza # or user.favorite_foods << pizza
— Also I hate broccoli!
As you wish! Just a little change to your Food model
class Food < ActiveRecord::Base markable_as [ :hated, :favorite ] end
and The World will know, what kind of food do you hate.
user.hated_foods << broccoli
You can easily get list of all food marked as favorite by your user
user.foods_marked_as :favorite # or user.foods_marked_as_favorite # or user.favorite_foods
Also you can get a list of all users, who loves pizza too!
pizza.users_have_marked_as :favorite # or pizza.users_have_marked_as_favorite
And all food loved by users
Food.marked_as :favorite # or Food.marked_as_favorite
— Hmm… What kind of food my friends likes?
Food.marked_as_favorite :by => [ user1, user2, user3 ]
— Hey! I have found a users who loves pizza too — I want to be friends with them!
No problem! Just make User markable as friendly!
class User < ActiveRecord::Base acts_as_marker markable_as :friendly, :by => :user end
And now you can add all pizza-lovers to your friends
user.friendly_users << pizza.users_have_marked_as_favorite
Piece of cake!
class User < ActiveRecord::Base acts_as_marker end class Food < ActiveRecord::Base markable_as :favorite end
# Getters user.favorite_foods # => [food1, food2, …] user.foods_marked_as :favorite # => [food1, food2, …] user.foods_marked_as_favorite # => [food1, food2, …] food.users_have_marked_as :favorite # => [user1, user2, …] food.users_have_marked_as_favorite # => [user1, user2, …] Food.marked_as :favorite # => [food1, food2, …] Food.marked_as :favorite, :by => user1 # => [food1, food2, …] Food.marked_as_favorite # => [food1, food2, …] Food.marked_as_favorite :by => user1 # => [food1, food2, …] # Setters user.favorite_foods << [food1, food2] user.foods_marked_as(:favorite) << [food1, food2] user.foods_marked_as_favorite << [food1, food2] user.mark_as_favorite [food1, food2] user.set_mark :favorite, [food1, food2] food.users_have_marked_as(:favorite) << [user1, user2] food.users_have_marked_as_favorite << [user1, user2] food.mark_as :favorite, [user1, user2] # Removals food.unmark :favorite food.unmark :favorite, :by => user1 food.users_have_marked_as(:favorite).delete [food1, food2] food.users_have_marked_as_favorite.delete [food1, food2] user.remove_mark :favorite, [food1, food2] user.favorite_foods.delete [food1, food2] # Check food.marked_as? :favorite food.marked_as_favorite?
You can find some usage examples at wiki page: Usage examples
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Copyright (c) 2012 Alex Chrome
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