![result]( "result")
本文介绍了参数缺失或值为空:ResultController#update 中的 ParameterMissing的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我有一个属于网站的结果.创建网站后，我还创建了结果并重定向到其编辑页面.在这里我想添加一些更多的值.
我的问题是:当我尝试更新我的结果时，我得到:
param is missing or the value is empty: result要求参数:{"utf8"=>"✓", "_method"=>"patch", "authenticity_token"=>"GRN/y/04Qbsm9DzlUAbUYF8ZSv2EMHnRZgBZY/6GMD1OBdq8V5Uncij9VRp51uyc=>"/html/body/div[position() = 3]/ul/li[position() = 16]/ul/li[position() = 2]/child::text()", "//html/body/div[位置()= 3]/ul/li[position() = 16]/ul/li[position() = 2]/p/a/child::text()", "//html/body/div[position()= 3]/ul/li[position() = 16]/ul/li[position() = 4]/child::text()", "//html/body/div[position()= 3]/ul/li[position() = 16]/ul/li[position() = 5]/a/child::text()"], "commit"=>"更新结果", "id"=>"66"}
这就是我的结果参数的样子
def result_paramsparams.require(:result).permit(:data)结尾
我的模型:
class 结果
这是我的控制器代码:
class ResultsController [])结尾结尾
我的观点:
<%结束%><div class="field"><% if @result.website.url != nil %><%= atts = get_all_elements(@result.website.url)%><% atts.each do |p|％＞<div><%= check_box_tag "data[]", get_xpath_from_node(p)%><%= p.text %>
<%end%><%结束%>
<div class="actions"><%= f.submit %>
<%结束%>
这是我调用编辑结果页面的地方:
def 更新response_to do |格式|如果@website.update(website_params)format.html { redirect_to @website，注意:'网站已成功更新.'}format.json { 渲染:显示，状态::ok，位置:@website }别的format.html { 渲染:编辑}format.json { 渲染 json: @website.errors, 状态: :unprocessable_entity }结尾结尾结尾
我已经尝试了我能找到的所有解决方案，但似乎没有一个对我有用.
解决方案
问题出在这里:
params.require(:result).permit(:data)
来自 require 文档，
require 确保参数存在.如果存在，则返回给定键处的参数，否则引发ActionController::ParameterMissing 错误.
您需要 result 参数，但参数中缺少该参数.您的所有值都在 data 参数中.删除 require 应该可以解决问题.
params.permit(:data)
如果你想保留 require，把 data 包裹在 result 中的表单中.
I have a Result that belongs to a Website. After I create the website I also create the result and redirect to its edit page. Here I want to add some more values.
My problem is: When I try to update my Result, then I get:
param is missing or the value is empty: result
Request
Parameters:
{"utf8"=>"✓", "_method"=>"patch", "authenticity_token"=>"GRN/y/04Qbsm9DzlUAbUYF8ZSv2EMHnRZgBZY/6GMDlOBdq8V5Uncij9VRp51uydC6M/qc61jPWwpUehSuc5xA==", "data"=>["//html/body/div[position() = 3]/ul/li[position() = 16]/ul/li[position() = 2]/child::text()", "//html/body/div[position()
= 3]/ul/li[position() = 16]/ul/li[position() = 2]/p/a/child::text()", "//html/body/div[position() = 3]/ul/li[position() = 16]/ul/li[position() = 4]/child::text()", "//html/body/div[position()
= 3]/ul/li[position() = 16]/ul/li[position() = 5]/a/child::text()"], "commit"=>"Update Result", "id"=>"66"}
This is how my Result params looks like
def result_params
params.require(:result).permit(:data)
end
My model:
class Result < ActiveRecord::Base
belongs_to :website
attr_accessor :website_id
attr_accessor :data
serialize :data, Array
end
Here is my controller code:
class ResultsController < ApplicationController
before_action :set_result, only: [:show, :edit, :update, :destroy]
# GET /Results
# GET /Results.json
def index
@results = Result.all
end
# GET /Results/1
# GET /Results/1.json
def show
end
# GET /Results/new
def new
@result = Result.new
end
# GET /Results/1/edit
def edit
@result = Result.find(params[:id])
end
# POST /Results
# POST /Results.json
def create
@result = Result.new(result_params)
respond_to do |format|
if @result.save
format.html { redirect_to @result, notice: 'Result was successfully created.' }
format.json { render :show, status: :created, location: result }
else
format.html { render :new }
format.json { render json: @result.errors, status: :unprocessable_entity }
end
end
end
# PATCH/PUT /Results/1
# PATCH/PUT /Results/1.json
def update
respond_to do |format|
if @result.update(result_params )
format.html { redirect_to @result, notice: 'Result was successfully updated.' }
format.json { render :show, status: :ok, location: @result }
else
format.html { render :edit }
format.json { render json: @result.errors, status: :unprocessable_entity }
end
end
end
# DELETE /Results/1
# DELETE /Results/1.json
def destroy
@result.destroy
respond_to do |format|
format.html { redirect_to results_url, notice: 'Result was successfully destroyed.' }
format.json { head :no_content }
end
end
private
# Use callbacks to share common setup or constraints between actions.
def set_result
@result = Result.find(params[:id])
end
# Never trust parameters from the scary internet, only allow the white list through.
def result_params
params.permit(:data => [])
end
end
My view:
<%= form_for(@result) do |f| %>
<% if @result.errors.any? %>
<div id="error_explanation">
<h2><%= pluralize(@result.errors.count, "error") %> prohibited this result from being saved:</h2>
<ul>
<% @result.errors.full_messages.each do |message| %>
<li><%= message %></li>
<% end %>
</ul>
</div>
<% end %>
<div class="field">
<% if @result.website.url != nil %>
<%= atts = get_all_elements(@result.website.url)%>
<% atts.each do |p| %>
<div>
<%= check_box_tag "data[]", get_xpath_from_node(p)%>
<%= p.text %>
</div>
<%end%>
<% end%>
</div>
<div class="actions">
<%= f.submit %>
</div>
<% end %>
And this is the place where i call the edit result page:
def update
respond_to do |format|
if @website.update(website_params)
format.html { redirect_to @website, notice: 'Website was successfully updated.' }
format.json { render :show, status: :ok, location: @website }
else
format.html { render :edit }
format.json { render json: @website.errors, status: :unprocessable_entity }
end
end
end
Ive allready tryed every solution I could find, but none of them seemed to work for me.
解决方案
The problem lies here:
params.require(:result).permit(:data)
From require documentation,
You are requiring result parameter but it's missing from the params. All your values are inside data param. Removing require should do the trick.
params.permit(:data)
If you want to keep require, wrap data inside result in forms.
这篇关于参数缺失或值为空:ResultController#update 中的 ParameterMissing的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！