Question

我正在开发一个具有以下模型的项目：

storyboards has many frames
frames has one of each puzzles and scenes
scenes
puzzles

我设置它以便框架与故事板相关联，但是我有拼图和场景分开存在。我想分别创建场景和谜题，然后在创建帧时将它们分配给帧。在框架的新形式中，我有两个集合，一个用于拼图，一个用于场景。我希望能够获取所选项目，查找该项目，并在相应的场景/谜题表中保存对帧编号的引用。但是，我一直得到一个空白的参数我的控制器代码如下：

class FramesController < ApplicationController

before_action :set_storyboard
before_action :set_frame, only: [:show, :edit, :update, :destroy]

def new
    @frame = @storyboard.frames.build
    @puzzles = Puzzle.all
    @scenes = Scene.all 
end

def create
    puts params.inspect
    @frame = @storyboard.frames.build(frame_params)
    @puzzle = Puzzle.find(frame_params[:puzzle])


    if @frame.save
        flash[:notice] = "Frame has been created."
        redirect_to [@storyboard, @frame]
    else
        flash.now[:alert] = "Frame has not been created."
        render "new"
    end
end

def show

end


private

def set_storyboard
    @storyboard = Storyboard.find(params[:storyboard_id])
end

def frame_params
    params.require(:frame).permit(:frame_order)
end

def set_frame
    @frame = @storyboard.frames.find(params[:id])
end
end

这还不完整，因为我还没有尝试找到场景，我正在尝试让拼图查找首先工作。在WEBrick中显示的参数如下：

Started POST "/storyboards/2/frames" for 127.0.0.1 at 2016-03-18 
06:33:13 -0500
Processing by FramesController#create as HTML
Parameters: {"utf8"=>"✓", 
"authenticity_token"=>"8KUEIEa7jVS2BsRFby8Cn8Hb0R5LM+paCNbKbfL5ielq01Q7IJlA3HtZX9+pLmYSPhRJq6xlhU2bR7umbv1T+w==", 
"frame"=>{"frame_order"=>"1", "scene"=>"2", "puzzle"=>"1"}, 
"commit"=>"Create Frame", "storyboard_id"=>"2"}

我的_form.html.erb如下：

<%= simple_form_for([storyboard, frame]) do |f| %>
<%= f.input :frame_order, label: "Frame Order" %>
<%= f.input :scene, collection: @scenes %>
<%= f.input :puzzle, collection: @puzzles %>

<%= f.button :submit, class: "btn-primary" %>

我得到的错误如下：

Failure/Error: @puzzle = Puzzle.find(frame_params[:puzzle])

 ActiveRecord::RecordNotFound:
   Couldn't find Puzzle with 'id'=

我认为可能是因为我正在使用强力参数，但如果我添加场景和拼图到frame_params，我也在创建时出错方法如下：

Failure/Error: @frame = @storyboard.frames.build(frame_params)

 ActiveRecord::AssociationTypeMismatch:
   Scene(#50941880) expected, got String(#6701160)

从我能够查找的内容中，使用params [：frame] [：puzzle]应该可以工作，并且应该给我一个值1，但相反，我什么都没得到。我不确定我做错了什么。任何帮助或建议将不胜感激。谢谢！

Answer 1

允许在frame_params中拼图： def frame_params params.require(:frame).permit(:frame_order,:puzzle) end

无法在Rails中阅读Params

1 个答案: