无法通过创建动作将行插入表中

Question

我确定必须有一个非常简单的解决方案来解决我的问题，但我不知道为什么我不能把它放在手指上，问题是我尝试提交表单，但每次我提出创建动作控制器提供了以下错误

Mysql2::Error: Column 'preffered_players' cannot be null: INSERT INTO saved_sessions (preffered_players , session_id , preffered_opponents , game_id , game_type , opponents_list , banned_players , players_list) VALUES (NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL)

形式怎么过所有这些值，错误认为是空的，通过参数尽快提交表单传递，任何人都可以告诉我如何使用我从表单中获取的参数值来填充我的查询中的小空值，创建控制器如下

def create 
    opponents_list = params[:opponents_list] 
    banned_players = params[:banned_players] 
    game_type = params[:game_type] 
    session_id = params[:session_id] 
    preffered_opponents = params[:preffered_opponents] 
    game_id = params[:game_id] 
    players_list = params[:players_list] 
    preffered_players = params[:preffered_players] 

    @saved_sessions = SavedSession.new(params[:saved_sessions]) 

    respond_to do |format| 
     if @saved_sessions.save 
     format.html { redirect_to(@game, :notice => 'Game was successfully created.') } 
     format.xml { render :xml => @game, :status => :created, :location => @game } 
     else 
     format.html { render :action => "new" } 
     format.xml { render :xml => @game.errors, :status => :unprocessable_entity } 
     end 
    end 
    end 

个

感谢您的任何意见...

我包括表单代码但其很凌乱（它的一个巨大的形式），加上其HAML :)

- form_tag('/saved_sessions',:method => :post, :id => "new_game") do 
.select_option 
    .list_col1 
    .fl 
     %img{:alt => "image", :border => "0", :src => "/images/happy_face.png"}/ 
    .blue_col 
     = text_field_tag :preffered_opponents, "", :class => :blue_bar 
    .clr 
    .list_col2 
    .list_col2_top_row 
     .radio_row 
     .fl 
      %input{:type => "radio", :name => "battle_scale", :value => "3"} 
     .fl 3 vs 3 
     .fl 
      %input{:type => "radio", :name => "battle_scale", :value => "5"} 
     .fl 5 vs 5 
     .clr 
     %div 
     .fl 
      %img{:alt => "image", :border => "0", :src => "/images/sad_face.png"}/ 
     .fl 
      /%input#banned_players.white_bar{:type => "text"}/ 
      = text_field_tag :banned_players, "", :class => :white_bar 
     .clr 
    .versus_row 
     #inputs-vs.versus_col1 
     .versus_col_row 
      .blue_col 
      /%input#input-1-vs.blue_bar{:type => "text"}/ 
      = text_field_tag 'input-1-vs', "", :class => :blue_bar 
      .fl 
      %img{:alt => "image", :border => "0", :src => "/images/lock.png"}/ 
      .clr 
     .versus_col_row 
      .blue_col 
      /%input#input-2-vs.blue_bar{:type => "text"}/ 
      = text_field_tag 'input-2-vs', "", :class => :blue_bar 
      .fl 
      %img{:alt => "image", :border => "0", :src => "/images/lock.png"}/ 
      .clr 
     .versus_col_row 
      .blue_col 
      /%input#input-3-vs.blue_bar{:type => "text"}/ 
      = text_field_tag 'input-3-vs', "", :class => :blue_bar 
      .fl 
      %img{:alt => "image", :border => "0", :src => "/images/lock.png"}/ 
      .clr 
     .versus_col_row 
      .blue_col 
      /%input#input-4-vs.blue_bar{:type => "text"}/ 
      = text_field_tag 'input-4-vs', "", :class => :blue_bar 
      .fl 
      %img{:alt => "image", :border => "0", :src => "/images/lock.png"}/ 
      .clr 
     .versus_col_row 
      .blue_col 
      /%input#input-5-vs.blue_bar{:type => "text"}/ 
      = text_field_tag 'input-5-vs', "", :class => :blue_bar 
      .fl 
      %img{:alt => "image", :border => "0", :src => "/images/lock.png"}/ 
      .clr 
     .versus_col2 
     %img{:alt => "0", :border => "0", :src => "/images/vs.png"}/ 
     #inputs.versus_col1 
     .versus_col_row 
      .fl 
      %img{:alt => "image", :border => "0", :src => "/images/lock.png"}/ 
      .blue_col 
      /%input#input-1.pink_bar{:name => "blah", :type => "text"}/ 
      = text_field_tag 'input-1', "", :class => :pink_bar 
      .clr 
     .versus_col_row 
      .fl 
      %img{:alt => "image", :border => "0", :src => "/images/lock.png"}/ 
      .blue_col 
      /%input#input-2.pink_bar{:name => "blah", :type => "text"}/ 
      = text_field_tag 'input-2', "", :class => :pink_bar 
      .clr 
     .versus_col_row 
      .fl 
      %img{:alt => "image", :border => "0", :src => "/images/lock.png"}/ 
      .blue_col 
      /%input#input-3.pink_bar{:name => "blah", :type => "text"}/ 
      = text_field_tag 'input-3', "", :class => :pink_bar 
      .clr 
     .versus_col_row 
      .fl 
      %img{:alt => "image", :border => "0", :src => "/images/lock.png"}/ 
      .blue_col 
      /%input#input-4.pink_bar{:name => "blah", :type => "text"}/ 
      = text_field_tag 'input-4', "", :class => :pink_bar 
      .clr 
     .versus_col_row 
      .fl 
      %img{:alt => "image", :border => "0", :src => "/images/lock.png"}/ 
      .blue_col 
      /%input#input-5.pink_bar{:name => "blah", :type => "text"}/ 
      = text_field_tag 'input-5', "", :class => :pink_bar 
      .clr 
     .clr 
    .session_row 
     %p 
     %b You can save and share this session by entering your email. A unique code will be sent 
     %p.small_text (Session are stored for 30 days) 
    .seesion_send_row 
     .fl 
     /%input.big_white_bar{:type => "text"}/ 
     = text_field_tag 'email_bar', "", :class => :big_white_bar 
     .fl 
     %span 2+2= 
     %span 
     %span 
      /%input.small_bar{:type => "text"}/ 
      = text_field_tag 'code_bar', "", :class => :small_bar 
     .fl 
     /%a{:href => "#."} 
     /%img{:alt => "image", :border => "0", :src => "/images/send_button.png"}/ 
     = submit_tag("Send") 

希望这可以帮助你人们更好地理解这个问题..

Answer 1

你似乎从两个不同的地方拉。该方法顶部的代码块将拉入传入参数顶层的值，但稍后您将使用params [：saved_sessions]输入初始化新的SavedSession。这两件事似乎不匹配...

如果在opponents_list = params [：opponents_list]找到saved_sessions.opponents_list在第一行，那么当您以后尝试保存params [：saved_sessions]时，重新从参数中的不同点获得它...

编辑：所以你不需要这两套值的行动中。如果你像这样构建你的表单（或者至少像这样），你会得到正确的参数，并且可以盲目地将它们发送到SavedSession.new中，然后调用.save。

- form_for(@aved_session) do |f| 
    -.blue_col 
     = f.text_field :preffered_opponents, "", :class => :blue_bar 

如果允许f.text_field打造的ID和名称，然后轨道魔将确保它们被命名为/正确id'd然后更神奇的轨道解释他们建立正确的输入参数。这将构建您的PARAMS为：

params = {:saved_session => {:preferred_opponents => "text value" }... 

然后你就可以拉这些PARAMS出来：

saved_session_input = params[:saved_session] 

，并将它们传递到新的，就像你。不同之处在于现在这些参数实际上在那里。

你是这样的方式：

params = {:preferred_opponents => "text value", :saved_session => {:preferred_opponents => nil }... 

这意味着你传递零在新的预期值。请注意，在调用保存之前，您实际上并未将您的本地值分配给新的saved_session。

我希望这更清楚。