Ruby on rails RubyonRails：创建时的多对多关联未定义方法

我通过协会建立了成员和团队模型

member.rb

has_many :teams, :through => :team_members
has_many :team_members

team.rb

has_many :members, :through => :team_members
has_many :team_members

团队成员.rb

belongs_to :member
belongs_to :team

当我尝试创建新团队时，出现以下错误：

undefined method `name' for nil:NilClass

参数为：

{"utf8"=>"✓",
 "authenticity_token"=>"aXpMxWxGlhogfn9EbBWciSjoMrYXbPxG8Kzha14na58=",
 "team"=>{"name"=>"Ruby",
 "email"=>"email@email.com",
 "language"=>"En",
 "link"=>"",
 "logo"=>#<ActionDispatch::Http::UploadedFile:0xb3907f0 @original_filename="You-Are-Great-.gif",
 @content_type="image/gif",
 @headers="Content-Disposition: form-data; name=\"team[logo]\"; filename=\"You-Are-Great-.gif\"\r\nContent-Type: image/gif\r\n",
 @tempfile=#<File:/tmp/RackMultipart20120723-1907-m3bi79>>},
 "commit"=>"Create Team"}

除非我像这样一个接一个地手动分配属性，否则团队不会被创建

@team = Team.new(:name => params[:team][:name], :email => params[:team][:email]...)

就这样！你知道为什么吗

编辑：

teams_controller.rb：

class TeamsController < ApplicationController
  # GET /teams
  # GET /teams.json
  def index
    @teams = Team.all

    respond_to do |format|
      format.html # index.html.erb
      format.json { render json: @teams }
    end
  end

  # GET /teams/1
  # GET /teams/1.json
  def show
    @team = Team.find(params[:id])

    respond_to do |format|
      format.html # show.html.erb
      format.json { render json: @team }
    end
  end

  # GET /teams/new
  # GET /teams/new.json
  def new
    @team = Team.new

    respond_to do |format|
      format.html # new.html.erb
      format.json { render json: @team }
    end
  end

  # GET /teams/1/edit
  def edit
    @team = Team.find(params[:id])
  end

  # POST /teams
  # POST /teams.json
  def create
    raise params.to_yaml
    @team = Team.new(params[:team])
    respond_to do |format|
      if @team.save
        @team_member = TeamMember.new(:team_id => @team.id, :member_id => current_member.id,
                                  :accepted => true, :leader => true, :joined => Time.now)
        if @team_member.save
          format.html { redirect_to team_path(@team), notice: 'Team was successfully created.' }
          format.json { render json: @team, status: :created, location: @team }
        else
          @team.destroy
          format.html { render action: "new" }
          format.json { render json: @team.errors, status: :unprocessable_entity }
        end
      else
        format.html { render action: "new" }
        format.json { render json: @team.errors, status: :unprocessable_entity }
      end
    end
  end

  # PUT /teams/1
  # PUT /teams/1.json
  def update
    @team = Team.find(params[:id])

    respond_to do |format|
      if @team.update_attributes(params[:team])
        format.html { redirect_to @team, notice: 'Team was successfully updated.' }
        format.json { head :no_content }
      else
        format.html { render action: "edit" }
        format.json { render json: @team.errors, status: :unprocessable_entity }
      end
    end
  end

  # DELETE /teams/1
  # DELETE /teams/1.json
  def destroy
    @team = Team.find(params[:id])
    @team.destroy

    respond_to do |format|
      format.html { redirect_to teams_url }
      format.json { head :no_content }
    end
  end

end

class teamscocontroller@team.id，：member_id=>current_member.id，
：accepted=>true，：leader=>true，：joined=>Time.now）
如果@team_member.save
format.html{重定向到team_路径（@team），注意：“team已成功创建”。}
format.json{render json:@team，status:：created，location:@team}
其他的
@毁灭队
format.html{呈现操作：“新建”}
format.json{render json:@team.errors，status:：unprocessable_entity}
结束
其他的
format.html{呈现操作：“新建”}
format.json{render json:@team.errors，status:：unprocessable_entity}
结束
结束
结束
#PUT/teams/1
#PUT/teams/1.json
def更新
@team=team.find（参数[：id]）
回应待办事项|格式|
如果@team.update_属性（参数[：team]）
format.html{将_重定向到@team，注意：'team已成功更新。}
format.json{head:no_content}
其他的
format.html{呈现操作：“编辑”}
format.json{render json:@team.errors，status:：unprocessable_entity}
结束
结束
结束
#删除/teams/1
#删除/teams/1.json
def销毁
@team=team.find（参数[：id]）
@毁灭队
回应待办事项|格式|
format.html{redirect_to teams_url}
format.json{head:no_content}
结束
结束
结束

team.rb模型：

class Team < ActiveRecord::Base

  attr_accessible :name, :email, :language, :link, :logo, :team_leader

  validates_presence_of :name
  validates_presence_of :email
  validates_presence_of :language
  validates_uniqueness_of :name

  has_many :leaders, :class_name => "TeamMember", :conditions => { :leader => true }
  has_many :members, :through => :team_members
  has_many :team_members, :conditions => { :accepted => true, :active => true }

  has_attached_file :logo,
    :styles => { :medium => "320x180>", :thumb => "100x100>" },
    :url  => "/assets/teams/:id/:style/:basename.:extension",
    :path => ":rails_root/public/assets/teams/:id/:style/:basename.:extension"
end

class团队“TeamMember”，：conditions=>{:leader=>true}
拥有多个：成员，：至=>：团队成员
有很多：团队成员，：条件=>{：接受=>true，：活动=>true}
已附加文件：徽标，
：style=>{:medium=>“320x180>”，：thumb=>“100x100>”，
：url=>“/assets/teams/：id/：style/：basename.：extension”，
：path=>“：rails\u root/public/assets/teams/：id/：style/：basename.：extension”
结束

请在控制器操作中显示所有相关代码。您提供的详细信息不会相互混淆。

undefined method

错误不是来自

new（）

调用中的

：name

属性

ActiveRecord:：UnknownAttributeError:unknown属性：…

是在提供无效属性时引发的。@Deefur对此表示抱歉，我希望现在已经清楚了。如果您还需要什么，请告诉我=）

class Team < ActiveRecord::Base

  attr_accessible :name, :email, :language, :link, :logo, :team_leader

  validates_presence_of :name
  validates_presence_of :email
  validates_presence_of :language
  validates_uniqueness_of :name

  has_many :leaders, :class_name => "TeamMember", :conditions => { :leader => true }
  has_many :members, :through => :team_members
  has_many :team_members, :conditions => { :accepted => true, :active => true }

  has_attached_file :logo,
    :styles => { :medium => "320x180>", :thumb => "100x100>" },
    :url  => "/assets/teams/:id/:style/:basename.:extension",
    :path => ":rails_root/public/assets/teams/:id/:style/:basename.:extension"
end