Rails - 嵌套表单未显示在“show”页面上

Question

我无法弄清楚如何通过嵌套模型收集一些数据出现在“show”页面上。我有一个包含3个模型的rails应用程序，用户模型，项目模型和团队模型。模型关联如下：

项目： -

class Project < ActiveRecord::Base

  has_many :users, :through => :team
  has_one :team, :dependent => :destroy

    accepts_nested_attributes_for :team, allow_destroy: true

end

小组： -

class Team < ActiveRecord::Base

    belongs_to :project
    has_many :users

end

用户： -

class User < ActiveRecord::Base
  # Include default devise modules. Others available are:
  # :confirmable, :lockable, :timeoutable and :omniauthable
  devise :database_authenticatable, :registerable,
         :recoverable, :rememberable, :trackable, :validatable


  has_and_belongs_to_many :teams


end

每个项目都有一个团队，每个团队都包含许多已保存在数据库中的用户。我想要做的就是能够在Project表单中选择多个现有用户（通过嵌套表单）并将其保存到名为Team的模型中。我设法使表单正常工作，但我不知道如何将收集的数据保存到团队模型，然后使所选的用户组（团队）出现在项目的显示页面中，因为那里涉及3个模型。请帮忙！

P.S我使用嵌套表单gem在项目表单中添加多个团队成员。

项目显示页面： -

<%= bootstrap_nested_form_for(@project, :html => {:multipart => true}, layout: :horizontal)   do |f| %>


  <% f.fields_for :teams do |builder| %>
  <% if builder.object.new_record? %>

  <%= builder.collection_select :user, User.all, :id, :email, { prompt: "Please select", :selected => params[:user], label: "Employee" } %> 
  <% else %> 
  <%= builder.hidden_field :_destroy %>
  <%= builder.link_to_remove "Remove" %>

  <% end %>

<%= f.link_to_add "Add Team Member", :teams %>



 <%= f.submit %>
<% end %>

项目控制器： -

class ProjectsController < ApplicationController
  before_action :set_project, only: [:show, :edit, :update, :destroy]

  respond_to :html

  def index
    @projects = Project.all
    respond_with(@projects)
  end

  def show
    respond_with(@project)
  end

  def new
    @project = Project.new
    @project.pictures.build
    @project.teams.build
    respond_with(@project)
  end


  def edit
  @project = Project.find(params[:id])
  @project.pictures.build
  @project.teams.build
  end

  def create

    @project = Project.new(project_params)
    if @project.save
    flash[:notice] = "Successfully created project."
    redirect_to @project
    else
    render :action => 'new'
    end

  end

  def update
    @project.update(project_params)
    respond_with(@project)
  end

  def destroy
    @project.destroy
    respond_with(@project)
  end

  private
    def set_project
      @project = Project.find(params[:id])
    end

    def project_params
      params.require(:project).permit(:id, :title, :description, :status, :phase, :location, :image, pictures_attributes: [:id, :image], teams_attributes: [:project_id, :user_id])
    end
end