Question

当我进入浏览器时，会显示“名称”和“位置”的值，但不会显示为“开始”和“结束”（日期）输入的值。这是我的'show'html和控制器的代码。

show.html.erb：

class TripsController < ApplicationController
def show
    @trip = Trip.find(params[:id])
end

def new
end

def create
    #render plain: params[:trip].inspect
    @trip = Trip.new(trip_params)

    @trip.save
    redirect_to @trip
end

private
    def trip_params
        params.require(:trip).permit(:name, :location, :start, :end)
    end
end

trips_controller.rb：

class Trip < ActiveRecord::Base
end

trip.rb：

ActiveRecord::Schema.define(version: 20151016023421) do
  create_table "trips", force: :cascade do |t|
    t.string   "location"
    t.string   "name"
    t.date     "start"
    t.date     "end"
    t.datetime "created_at", null: false
    t.datetime "updated_at", null: false
    t.integer  "user_id"
  end
end

schema.rb：

2.2.3 :013 > Trip.first
  Trip Load (0.5ms)  SELECT  "trips".* FROM "trips"  ORDER BY "trips"."id"         ASC LIMIT 1
 => #<Trip id: 1, location: "we", name: "a", start: nil, end: nil,  created_at: "2015-10-21 03:17:45", updated_at: "2015-10-21 03:17:45", user_id:  nil>

2.2.3 :014 > Trip.create(name: 'test', location: 'test location', start:  '2015-10-21', end: '2015-10-27')
   (0.1ms)  begin transaction
  SQL (0.5ms)  INSERT INTO "trips" ("name", "location", "start", "end",    "created_at", "updated_at") VALUES (?, ?, ?, ?, ?, ?)  [["name", "test"],   ["location", "test location"], ["start", "2015-10-21"], ["end", "2015-10-27"],  ["created_at", "2015-10-21 04:44:18.436966"], ["updated_at", "2015-10-21  04:44:18.436966"]]
   (22.7ms)  commit transaction
 => #<Trip id: 11, location: "test location", name: "test", start: "2015-10- 21", end: "2015-10-27", created_at: "2015-10-21 04:44:18", updated_at: "2015-10- 21 04:44:18", user_id: nil>

在我的rails控制台中：

<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="utf-8" />
        <title>school</title>
        <link rel="stylesheet" href=
  "http://cdn.rawgit.com/jtblin/angular-chart.js/master/dist/angular-chart.css" type=
  "text/css" />
  <script src="http://cdn.rawgit.com/nnnick/Chart.js/master/Chart.min.js" type=
  "text/javascript">
</script>
  <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.3.9/angular.min.js"
  type="text/javascript">
</script>
  <script src=
  "http://cdn.rawgit.com/jtblin/angular-chart.js/master/dist/angular-chart.js"
  type="text/javascript">
</script>

        <script type="text/javascript" src="js/script.js"></script>
    </head>
    <body ng-app="app">
      <div ng-controller="LineCtrl">
        <canvas id="line" class="chart chart-line" chart-data="data" chart-labels="labels" 
                    chart-legend="true" chart-series="series" chart-click="onClick"></canvas> 
        </div>
    </body>
</html>

Answer 1

我认为您的@trip.start和@trip.end是nil，这就是您在浏览器中看不到的原因。尝试这样做以确认：

<p>
  <strong>Start Date:</strong>
  <%= @trip.start.inspect %>
</p>

<p>
  <strong>End Date:</strong>
  <%= @trip.end.inspect %>
</p>

查看它现在是否显示nil个值。

如果存在该值，它将在浏览器中显示该值。

两个参数的值未显示在轨道上的红宝石

1 个答案: