将多个对象合并在一起的更有效方法

Question

So I'm trying to make an array that contains multiple objects, but first off I need to merge two kinds of objects into one, then add it to the array. The reason for this is so that I can loop through the array in a view and easily display the content. I'm working with tree different objects, Users, Players, and Teams. A User owns multiple players and multiple teams through players. I need to visually display information from both the team object and the player object, but I need to merge them into a single object and insert it into an array. So I'll be doing this for every team/player that the player owns and inserting them into an array that holds them all.

Here is my crack at this

    array = []
    @user.players.each do |player|
        @user.teams.each do |team|
            if player.team_id == team.id
                array << UserTeam.new(:id => team.id,
                                      :name => team.name,
                                      :tag => team.tag,
                                      :description => team.description,
                                      :recruiting => team.recruiting,
                                      :wins => team.wins,
                                      :losses => team.losses,
                                      :t_wins => team.t_wins,
                                      :rating => team.rating,
                                      :role => player.role,
                                      :position => player.position)
            end
        end
    end
    @teams = array

This works and I get the result I want, but I'm sure this is a really inefficient way to do it. What would be a better way of doing this? Can anyone help a rookie rails dev out?

Answer 1

It's difficult to determine why you're actually lumping everything into a single object. What are you intending to do with the result? If this is just for display purposes, you can use something much simpler and more elegant.

Assumptions

Models

class User < ActiveRecord::Base
  has_many :players
  has_many :teams, through: :players
end

class Player < ActiveRecord::Base
  belongs_to :user
  belongs_to :team
end

class Team < ActiveRecord::Base
  has_many :players
end

Controller

@players = @user.players.includes(:team)

View

<table>
  <thead>
    <tr>
      <th>Team Id</th>
      <th>Team Name</th>
      <!-- other team columns -->
      <th>Player Role</th>
      <th>Player Position</th>
    </tr>
  </thead>
  <tbody>
  <% @players.each do |player| %>
    <tr>
      <td><%= player.team.id %></td>
      <td><%= player.team.name %></td>
      <!-- other columns -->
      <td><%= player.role %></td>
      <td><%= player.position %></td>
    </tr>
  <% end %>
  </tbody>
</table>