嵌套对象创建空白条目

Question

不知何故，我的创建操作无法正常工作，但编辑操作正常。我的代码中某处出错了，我似乎无法找到它。正如标题所说，即使填写我的字段，我也会创建一个空白条目。

花名册嵌套在团队类中，像这样。

/团队/ ID /名册/ ID

rosters_controller.rb

class RostersController < ApplicationController 
    before_action :set_roster, only: [:show, :edit, :update, :destroy, :player_roster] 
    before_action :team 
    before_filter :authenticate_user! 

    def index 
    @rosters = @team.rosters 
    end 

    def show 
    @players = Player.all 
    end 

    def new 
    @roster = Roster.new 
    end 

    def edit 
    @players = Player.all 
    end 

    def create 
    @roster = @team.rosters.build(params[:roster_params]) 

    respond_to do |format| 
     if @roster.save 
     format.html { redirect_to team_rosters_path(@roster.team), notice: 'Roster was successfully created.' } 
     format.json { render action: 'show', status: :created, location: @roster.team } 
     else 
     format.html { render action: 'new' } 
     format.json { render json: @roster.errors, status: :unprocessable_entity } 
     end 
    end 
    end 

    def update 

    respond_to do |format| 
     if @roster.update(roster_params) 
     format.html { redirect_to team_rosters_path(@roster.team), notice: 'Roster was successfully updated.' } 
     format.json { head :no_content } 
     else 
     format.html { render action: 'edit' } 
     format.json { render json: @roster.errors, status: :unprocessable_entity } 
     end 
    end 
    end 

    def destroy 

    @roster.destroy 
    respond_to do |format| 
     format.html { redirect_to team_rosters_path(@roster.team), notice: 'Roster was successfully deleted.' } 
     format.json { head :no_content } 
    end 
    end 

    private 

    def team 
     @team = Team.find(params[:team_id]) 
    end 

    def set_roster 
     @roster = Roster.find(params[:id]) 
    end 

    def roster_params 
     params.require(:roster).permit(:name, :team_id, :starts_at, :ends_at, :current, :player_tokens, :q) 
    end 
end 

名册形成

<%= form_for([@team, @roster]) do |f| %> 
    <% if @roster.errors.any? %> 
    <div id="error_explanation"> 
     <h2><%= pluralize(@roster.errors.count, "error") %> prohibited this roster from being saved:</h2> 
     <ul> 
     <% @roster.errors.full_messages.each do |msg| %><li><%= msg %></li><% end %> 
     </ul> 
    </div> 
    <% end %> 

    <%= f.label :current %><br> 
    <%= f.check_box :current %><br> 

    <%= f.label :starts_at %><br> 
    <%= f.date_select :starts_at %><br> 

    <%= f.label :ends_at %><br> 
    <%= f.date_select :ends_at, {:include_blank => true, :default => nil} %><br> 

    <%= f.label :player_tokens, "Players" %><br /> 
    <%= f.text_field :player_tokens, "data-pre" => @roster.players.map(&:attributes).to_json, :id => "player-tokens" %><br> 

    <%= f.submit :class => "btn btn-warning" %> 

    <script type="text/javascript"> 
    $(document).ready(function() { 
    $("#player-tokens").tokenInput("/players.json", { 
     crossDomain: false, 
     prePopulate: $("#roster_player_tokens").data("pre"), 
     theme: "facebook", 
     propertyToSearch: "gamertag", 
     hintText: "Type in a gamertag", 
     searchingText: "Searching...", 
     tokenLimit: 4, 
     preventDuplicates: true 
     }); 
    }); 
    </script> 

<% end %> 

名册模型

class Roster < ActiveRecord::Base 
    attr_reader :player_tokens 

    has_and_belongs_to_many :players 
    has_many :placements 

    belongs_to :team, touch: true 

    def current_roster? 
     current? 
    end 

    def player_tokens=(ids) 
     self.player_ids = ids.split(",") 
    end 

    def self.total_prize_money 
     sum.placements(:prize_money) 
    end 
end 

Answer 1

不要使用强参数在你的create方法，所以没有参数传递给您的模型。该模型没有任何验证属性的存在，所以它只会创建一个空白记录。

在您的控制器中，您需要更改为使用已在更新操作中使用的强参数。变化：

def create 
    @roster = @team.rosters.build(params[:roster_params]) 
    ... 

到：

def create 
    @roster = @team.rosters.build(roster_params) 
    ...