Rails - Nested form data not appearing in “edit” page despite showing in “show” page

问题

I have a rails app in which I have a Project model, a Team model and a User model. I am trying to create a nested form within the Project form using the Team model, and in this nested form I have a collection_select field which allows the user to select an existing User's email (from the User model) and input the data retrieved in a column called :member within the Team model.

The issue at hand is that that after saving the form, the fields from the nested form appear in the show page, however when I go back to editing the form, the previous entries for the nested form do not appear in the form for me to edit or remove. How can I make the existing form entries appear in the edit page?

project form :-

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

.
.
  <% f.fields_for :teams do |builder| %>
    <%= builder.collection_select :member, User.all, :id, :email, { prompt: "Please select", :selected => params[:user], label: "Employee" } %> 
    <%= builder.link_to_remove "Remove" %>
  <% end %>
  <%= f.link_to_add "Add Team Member", :teams %>


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

Projects controller:-

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, :id, :member])
    end
end

来源：https://stackoverflow.com/questions/31807042/rails-nested-form-data-not-appearing-in-edit-page-despite-showing-in-show

标签

ruby-on-rails

nested-forms