Discover rails-engine/action-store Open Source project

ActionStore

Store different kinds of actions (Like, Follow, Star, Block, etc.) in a single table via ActiveRecord Polymorphic Associations.

Like Posts/Comment/Reply ...
Watch/Subscribe to Posts
Follow Users
Favorite Posts
Read Notifications/Messages

And more and more.

中文介绍和使用说明

Basic table struct

Column	Chars Limit	Description
`action_type`	64	The type of action [like, watch, follow, star, favorite]
`action_option`	64	Secondary option for storing your custom status, or null if unneeded.
`target_type`, `target_id`	64	Polymorphic Association for different `Target` models [User, Post, Comment]
`user_type`	64	Polymorphic Association for different user model [User, Group, Member]

Uniqueness

version: ">= 0.4.0"

The have database unique index on fields: [action_type, target_type, target_id, user_type, user_id] for keep uniqueness for same action from user to target.

Usage

gem 'action-store'

and run bundle install

Generate Migrations:

$ rails g action_store:install
create  config/initializers/action_store.rb
migration 20170208024704_create_actions.rb from action_store

and run rails db:migrate.

Define Actions

Use action_store to define actions:

# app/models/user.rb
class User < ActiveRecord::Base
  action_store <action_type>, <target>, opts
end

Convention Over Configuration:

action, target	Target Model	Target `counter_cache_field`	User `counter_cache_field`	Target has_many	User has_many
`action_store :like, :post`	`Post`			`has_many :like_by_user_actions`, `has_many :like_by_users`	`has_many :like_post_actions`, `has_many :like_posts`
`action_store :like, :post, counter_cache: true`	`Post`	`likes_count`		`has_many :like_by_user_actions`, `has_many :like_by_users`	`has_many :like_post_actions`, `has_many :like_posts`
`action_store :star, :project, class_name: 'Repository'`	`Repository`	`stars_count`	`star_projects_count`	`has_many :star_by_user_actions`, `has_many :star_by_users`
`action_store :follow, :user`	`User`	`follows_count`	`follow_users_count`	`has_many :follow_by_user_actions`, `has_many :follow_by_users`	`has_many :follow_user_actions`, `has_many :follow_users`
`action_store :follow, :user, counter_cache: 'followers_count', user_counter_cache: 'following_count'`	`User`	`followers_count`	`following_count`	`has_many :follow_by_user_actions`, `has_many :follow_by_users`	`has_many :follow_user_actions`, `has_many :follow_users`

for example:

# app/models/user.rb
class User < ActiveRecord::Base
  action_store :like, :post, counter_cache: true
  action_store :star, :post, counter_cache: true, user_counter_cache: true
  action_store :follow, :post
  action_store :like, :comment, counter_cache: true
  action_store :follow, :user, counter_cache: 'followers_count', user_counter_cache: 'following_count'
end

Counter Cache

Add counter_cache field to target and user tables.

add_column :users, :star_posts_count, :integer, default: 0
add_column :users, :followers_count, :integer, default: 0
add_column :users, :following_count, :integer, default: 0

add_column :posts, :likes_count, :integer, default: 0
add_column :posts, :stars_count, :integer, default: 0

add_column :comments, :likes_count, :integer, default: 0

Example usage:

@user likes @post

irb> User.create_action(:like, target: @post, user: @user)
true
irb> @user.create_action(:like, target: @post)
true
irb> @post.reload.likes_count
1

@user1 unlikes @user2

irb> User.destroy_action(:follow, target: @post, user: @user)
true
irb> @user.destroy_action(:like, target: @post)
true
irb> @post.reload.likes_count
0

Check if @user1 likes @post

irb> action = User.find_action(:follow, target: @post, user: @user)
irb> action = @user.find_action(:like, target: @post)
irb> action.present?
true

Other following use cases:

# @user1 -> follow @user2
irb> @user1.create_action(:follow, target: @user2)
irb> @user1.reload.following_count
=> 1
irb> @user2.reload.followers_count
=> 1
irb> @user1.follow_user?(@user2)
=> true

# @user2 -> follow @user1
irb> @user2.create_action(:follow, target: @user1)
irb> @user2.follow_user?(@user1)
=> true

# @user1 -> follow @user3
irb> @user1.create_action(:follow, target: @user3)

# @user1 -> unfollow @user3
irb> @user1.destroy_action(:follow, target: @user3)

Subscribe cases:

Sometimes, you may need use action_option option.

For example, user to subscribe a issue (like GitHub Issue) on issue create, and they wants keep in subscribe list on unsubscribe for makesure next comment will not subscribe this issue again.

So, in this case, we should not use @user.unsubscribe_issue method to destroy action record, we need set a value on action_option to mark this subscribe is ignore.

irb> User.create_action(:subscribe, target: @issue, user: @user)
irb> @user.subscribe_issue?(@issue)
=> true

irb> User.create_action(:subscribe, target: @issue, user: @user, action_option: "ignore")
irb> @user.subscribe_issue?(@issue)
=> true

irb> action = User.find_action(:subscribe, target: @issue, user: @user)
irb> action.action_option
=> "ignore"

irb> @issue.subscribe_by_user_actions.count
=> 1
irb> @issue.subscribe_by_user_actions.where(action_option: nil).count
=> 0

Use different tables for store actions.

since 1.1.0

Sometimes, you may want to store actions into different table, for example, Like scenarios often have a lot of data, we wants store them into likes table.

Create a migration and model

$ rails g migration create_likes

And then modify this migration file to let this table have same struct like the actions

class CreateLikes < ActiveRecord::Migration[6.1]
  def change
    create_table :likes do |t|
      t.string :action_type, null: false
      t.string :action_option
      t.string :target_type
      t.bigint :target_id
      t.string :user_type
      t.bigint :user_id

      t.timestamps
    end

    add_index :likes, %i[user_type user_id action_type]
    add_index :likes, %i[target_type target_id action_type]
    add_index :likes, %i[action_type target_type target_id user_type user_id], unique: true, name: :uk_likes_target_user
  end
end

Create a app/model/like.rb model file:

class Like < Action
  self.table_name = "likes"
end

And then change you action_store define to special some case to use Like model:

# app/models/user.rb
class User < ActiveRecord::Base
  action_store :like, :post, counter_cache: true, action_class_name: "Like"
  action_store :like, :comment, counter_cache: true, action_class_name: "Like"
end

Now, user.like_post, user.like_comment will store the actions into likes table.

Built-in relations and methods

When you call action_store, ActionStore will define many-to-many relations for User and Target models.

For example:

class User < ActiveRecord::Base
  action_store :like, :post
  action_store :block, :user
end

Defines many-to-many relations:

For User model: <action>_<target>s (like_posts)
For Target model: <action>_by_users (like_by_users)

# for User model
has_many :like_post_actions
has_many :like_posts, through: :like_post_actions
## as user
has_many :block_user_actions
has_many :block_users, through: :block_user_actions
## as target
has_many :block_by_user_actions
has_many :block_by_users, through: :block_by_user_actions

# for Target model
has_many :like_by_user_actions
has_many :like_by_users, through: :like_user_actions

And User model will now have methods:

@user.create_action(:like, target: @post)
@user.destroy_action(:like, target: @post)
@user.find_action(:like, target: @post)
@user.like_post(@post)
@user.like_post?(@post)
@user.unlike_post(@post)
@user.block_user(@user1)
@user.unblock_user(@user1)
@user.like_post_ids
@user.block_user_ids
@user.block_by_user_ids

rails-engine/action-store

rails-engine

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