ruby-on-rails – 嵌入式表单更新上的ActiveSupport :: HashWith

这是最简单的例子：

形成：

<h1>PlayersToTeams#edit</h1>
<%= form_for @players_to_teams do |field| %>
    <%= field.fields_for @players_to_teams.player do |f| %>
        <%= f.label :IsActive %>
        <%= f.text_field :IsActive %>
    <% end %>
    <%= field.label :BT %>
    <%= field.text_field :BT %>
    <br/>
    <%= field.submit "Save",class: 'btn btn-primary' %>
<% end %>

楷模：

class PlayersToTeam < ActiveRecord::Base
  belongs_to :player
  belongs_to :team

  accepts_nested_attributes_for :player
end

class Player < ActiveRecord::Base
  has_many :players_to_teams
  has_many :teams,through: :players_to_teams
end

控制器：

class PlayersToTeamsController < ApplicationController
  def edit
    @players_to_teams=PlayersToTeam.find(params[:id])
  end

  def update
    @players_to_teams=PlayersToTeam.find(params[:id])
    respond_to do |format|
      if @players_to_teams.update_attributes(params[:players_to_team])
        format.html { redirect_to @players_to_teams,notice: 'Player_to_Team was successfully updated.' }
        format.json { head :no_content }
      else
        format.html { render action: "edit" }
        format.json { render json: @players_to_teams.errors,status: :unprocessable_entity }
      end
    end
  end
end

这是表单提交时的params [：players_to_team]对象：

?

ActiveSupport :: HashWithIndifferentAccess错误是什么意思？要让此表单更新players_to_team条目,我需要做些什么？

编辑

BT是players_to_teams中的一列.如果我删除了teh field_for块,我可以成功保存BT字段/ players_to_teams行.

谢谢