Rails的3.1+嵌套表格问题：无法大规模指派保护属性(Rails 3.1+ Nested For

我有一个篮球的应用程序，其中名册有很多球员，而能够向玩家在多个名册。（原因很多一对多的是一个球员，名册存档）

Roster.rb

class Roster < ActiveRecord::Base
      belongs_to :team
      has_many :rosterizes
      has_many :players, :through => :rosterizes
      accepts_nested_attributes_for :players
      attr_accessible :jersey_number, :team_id, :class_year, :players
    end

Rosterizes.rb（命名不佳，我知道...）

class Rosterize < ActiveRecord::Base
  belongs_to :player
  belongs_to :roster
  attr_accessible :player_id, :roster_id
end

Player.rb

class Player < ActiveRecord::Base
  has_many :rosterizes
  has_many :rosters, :through => :rosterizes
  validates_presence_of :first_name, :last_name
  attr_accessible :first_name, :last_name, :active
end

风景

<div class="well">
    <h2>New Player</h2>
    <%= simple_form_for @roster, :url =>player_added_team_path, :html => { :class => 'form-horizontal' } do |f| %>
        <%= f.simple_fields_for @new_player do |x| %>
            <%= x.input :first_name %>
            <%= x.input :last_name %>
        <%end%>
        <%=f.input :class_year %>       
        <%=f.input :jersey_number %>
        <%=f.input :team_id, :as => :hidden, :input_html => {:value => params[:id]}%>

        <div class="well">
        <%= f.button :submit, :class => 'btn-primary icon-plus-sign btn-success', :value => "Add To Team" %>
        </div>
    <%end%>
</div>

我发送到控制器PARAMATERS：

"roster"=>{"player"=>{"first_name"=>"first name", "last_name"=>"last name"}, "class_year"=>"freshman", "jersey_number"=>"23", "team_id"=>"1"}, "commit"=>"Add To Team", "id"=>"1"}

控制器正在处理的保存：

def player_added
   @team = Team.find(params[:id])

   #where the issue is happening
   @roster = @team.rosters.build(params[:roster])
   @roster.save
   ...

end

我身边有使用参数使用工作，但我想了解我在做什么错在这里为今后/学习的目的，为什么它给我：不能大规模指派保护属性

我的解决办法（有点哈克）：

def player_added

    @team = Team.find(params[:id])
    @roster = @team.rosters.build(:class_year => params[:roster][:class_year], :jersey_number => params[:roster][:jersey_number])
    @new_player = @roster.players.build(:first_name => params[:roster][:player][:first_name], :last_name => params[:roster][:player][:last_name])

    @roster.save
    @new_player.save

    ...

end

我使用Simple_Form 2.0 ...

我知道这是一个大量的信息，但感谢你提前！

解

只是柜面其他人是否有相同的我是相同/相似的问题...

我=>安装这个插件https://github.com/ryanb/nested_form

所以这就是我所做的更改：

Roster.rb

class Roster < ActiveRecord::Base
  belongs_to :team
  has_many :rosterizes
  has_many :players, :through => :rosterizes
  accepts_nested_attributes_for :players
  attr_accessible :jersey_number, :class_year, :players, :player_attributes
end

我也做了更改到视图：

 <%= simple_nested_form_for @roster, :url =>player_added_team_path, :html => { :class => 'form-horizontal' } do |f| %>
      <%= f.simple_fields_for :players, @roster.players.build do |x| %>
           # nested form
           ...
      <%end%>
      # form
      ...
<%end%>

控制器保存高清player_added

@team = Team.find(params[:id])
@roster = @team.rosters.build(params[:roster])
@roster.save

...

结束

这是在屁股上，我听不懂，希望这将削减下来的时间，以任何你寻找答案/学习nested_forms痛！

问题是你命名你的嵌套的关联属性的办法，并与参数您发送：

嵌套属性:players应该是:players_attributes和:team_id不应该上市的（因为它覆盖小组关联导轨魔法）：

attr_accessible :jersey_number, :class_year, :players_attributes

而参数应该有这样的格式：

"roster"=>{"players_attributes"=>[{"first_name"=>"first name", "last_name"=>"last name"}], "class_year"=>"freshman", "jersey_number"=>"23"}, "commit"=>"Add To Team", "id"=>"1"}

要做到这一点，你应该改变simple_form_for @roster到simple_nested_form_for @roster

请注意，您不必包括"team_id"中的参数属性"roster" ，因为你已经装载和名册关联到它。