Question

我是ruby on rails的新手，我有一个问题是获取datetime类型的参数并将它们传递给编辑页面。这个想法是有一个名为week的表，其中包含有关课程的信息以及每门课程的开始周（日期），用户可以创建和编辑这些周。我有一个用于编辑的表单页面，并创建课程的名称和开始日期。我使用f.datetime_select从用户获取每个课程的开始日期。这是表单和索引页面：

索引（第一页）：

 %tbody
    - @weeks.each do |week|
      %tr
        %td= week.course ? week.course.name : "unassigned"
        %td= week.start.strftime("%a, %d.%m.%Y").to_s
        %td= link_to 'Edit', edit_week_path(week)
        %td= link_to 'Destroy', week, :method => :delete, :data => { :confirm => 'Are you sure?' }

表单页面：

= form_for @week do |f|
  - if @week.errors.any?
    #error_explanation
      %h2= "#{pluralize(@week.errors.count, "error")} prohibited this week from being saved:"
      %ul
        - @week.errors.full_messages.each do |msg|
          %li= msg

  .form-group
    = f.label :course
    = @course.name
  .form-group.form-inline
    = f.label :start
    = f.datetime_select :start, {order: [:month, :day, :year], prompt: { day: 'Select day', month: 'Select month', year: 'Select year' }}, {required: true}
  .actions
    = f.submit 'Save', :class => "btn btn-primary"

创建新日期没有问题，但我在编辑用户在上述表单中保存的日期时遇到问题。实际上当用户点击编辑页面时，日期时间错误显示如下：

F, [2018-01-25T21:16:43.454087 #819] FATAL -- : 
ActionView::Template::Error (undefined method `to_datetime' for 0:Fixnum):
    11:     = @course.name
    12:   .form-group.form-inline
    13:     = f.label :start
    14:     = f.datetime_select :start, {order: [:month, :day, :year], prompt: { day: 'Select day', month: 'Select month', year: 'Select year' }}, {required: true}
    15:     //= f.date_select :start, {}, { :class => "form-control" }
    16:   .actions
    17:     = f.submit 'Save', :class => "btn btn-primary"
  app/views/weeks/_form.html.haml:14:in `block in _app_views_weeks__form_html_haml___241486880657666967_43852860'
  app/views/weeks/_form.html.haml:1:in `_app_views_weeks__form_html_haml___241486880657666967_43852860'
  app/views/weeks/edit.html.haml:3:in `_app_views_weeks_edit_html_haml___597540861062441854_41928920'

这是控制器文件：

class WeeksController < ApplicationController
  before_filter :authenticate_user!
  before_filter :admincheck
  before_action :set_week, only: [:show, :edit, :update, :destroy]

  # GET /weeks
  # GET /weeks.json
  def index
    @weeks = @course.weeks
  end

  # GET /weeks/new
  def new
    @week = Week.new
  end

  # GET /weeks/1/edit
  def edit
  end

  def show
  end

  # POST /weeks
  # POST /weeks.json
 def create
    @week = Week.new(week_params.merge(course_id: @course.id))
    if @week.save
      redirect_to '/weeks'
    else
      render action: 'new'
    end
  end

  # PATCH/PUT /weeks/1
  # PATCH/PUT /weeks/1.json
  def update
    if @week.update(week_params)
      redirect_to '/weeks'
    else
      render action: 'edit'
    end
  end

  # DELETE /weeks/1
  # DELETE /weeks/1.json
  def destroy
    @week.destroy
    redirect_to '/weeks'
  end

  private
    # Use callbacks to share common setup or constraints between actions.
    def set_week
      @week = Week.find(params[:id])
    end

    list through.
    def week_params
      params.require(:week).permit(:start,:course_id)
    end
end

这是schema.rb中表的定义：

 create_table "weeks", force: true do |t|
        t.datetime "start"
        t.datetime "created_at"
        t.datetime "updated_at"
        t.integer  "course_id"
    end

任何帮助将不胜感激：）

Answer 1

如果这是（或曾经）是4.0.0和4.0.3之间的轨道：this is a known bug就是was fixed in 4.0.4。

因此，在这种情况下，最好的解决方案就是升级导轨。

（用于0：Fixnum的未定义方法`to_datetime'）用于编辑f.datetime_select字段

1 个答案: