CODEWITHSUNDEEP
ruby-on-railsruby-on-rails-4tags
hellomello
hellomello

Reputation: 8587

Rails 4 Tagging users on a model

Whats the best method on tagging users? If you have a team model, and when you create a team, you want to add the members, how would this architecture work?

I was thinking of just using acts as tanggble and use it on the users, but not sure if this would be the best method? Is there another gem out there that would do something like this?

Upvotes: 2

Views: 251

Answers (2)

Richard Peck
Richard Peck

Reputation: 76784

To add to @tpbowden's answer, if you just want to "tag" users, you may wish to use has_and_belongs_to_many:

# app/models/user.rb
class User < ActiveRecord::Base
   has_and_belongs_to_many :teams
end

# join table "teams_users" - team_id | user_id

# app/models/team.rb
class Team < ActiveRecord::Base
   has_and_belongs_to_many :users
end

This will allow you to use the singular_collection_ids method, with which you'll be able to define which user is in a "team":

#app/controllers/teams_controller.rb
class TeamsController < ApplicationController
   def edit
     @team = Team.find params[:id]
   end

   def update
     @team = Team.find params[:id]
     @team.update team_params
   end

   private

   def team_params
     params.require(:team).permit(user_ids: [])
   end
end

#app/views/teams/edit.html.erb
<%= form_for @team do |f| %>
   <%= f.collection_select :user_ids, User.all, :id, :name %>
   <%= f.submit %>
<% end %>

This is as close to "tagging" as you're going to get without any extra dependencies.

Upvotes: 0

tpbowden
tpbowden

Reputation: 2090

It sounds like you're looking for a has many through relationship. This would require you to have a joining table called team_members to record which users are members of each team, having user_id and team_id columns. So for example your Team model would have a relationship that looks like this:

has_many :users, through: :team_members

This then defines the appropriate method on Team for adding, querying and removing users.

More information is here

Upvotes: 2

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