ruby-on-rails - time_select 空白字段保存表单提交时的默认时间

Question

我无法理解我的 time_select 选项。我的目标是在表单提交后仅在我的显示操作中呈现用户创建的时间选择。

然而，正在发生的事情是为用户未触及的所有 time_select 字段呈现默认时间 12:00 AM。我正在寻找一种方法来阻止默认时间值的保存（如果我不得不猜测，这是不可能的），或者创建一个允许我阻止默认时间值呈现的条件。

到目前为止，我已经查看了以下内容但没有成功：

这是我的代码：

_form.html.erb (only the snippet that I am having trouble with for brevity)


                    <td>
                    <span style="display: block; width: auto; margin-left: 4%">
                        <%= f.time_select :med1_time_of_day1, { include_blank: true, twelve_hour: true, minute_step: 15, ampm: true }, style: "width: 45%;" %>
                    </span>
                    <span style="display: block; width: auto; margin-left: 4%">
                        <%= f.time_select :med1_time_of_day2, { include_blank: true, twelve_hour: true, minute_step: 15, ampm: true }, style: "width: 45%;" %>
                    </span>
                    <span style="display: block; width: auto; margin-left: 4%">
                        <%= f.time_select :med1_time_of_day3, { include_blank: true, twelve_hour: true, minute_step: 15, ampm: true }, style: "width: 45%;" %>
                    </span>
                    <span style="display: block; width: auto; margin-left: 4%">
                        <%= f.time_select :med1_time_of_day4, { include_blank: true, twelve_hour: true, minute_step: 15, ampm: true }, style: "width: 45%;" %>
                    </span>
                </td>
                <td>

show.html.erb

<table class="table table-bordered table-striped">
        <thead>
            <th>Medication Name & Instructions for Use</th>
            <th>Time of Day</th>
            <th>
                Day(s) of the Month Medication was Taken
            </th>
        </thead>
        <tbody>
            <td>
                <%= @med_record_form.med1_name %>
                <%= @med_record_form.med1_instruct %>
            </td>
            <td>
                <% unless @med_record_form.med1_time_of_day1.nil? %>
                    <%= @med_record_form.med1_time_of_day1.strftime("%I:%M %p") %>
                    <br />
                <% end %>
                <% unless @med_record_form.med1_time_of_day2.nil? %>
                    <%= @med_record_form.med1_time_of_day2.strftime("%I:%M %p") %>
                    <br />
                <% end %>
                <% unless @med_record_form.med1_time_of_day3.nil? %>
                    <%= @med_record_form.med1_time_of_day3.strftime("%I:%M %p") %>
                    <br/>
                <% end %>
                <% unless @med_record_form.med1_time_of_day4.nil? %>
                    <%= @med_record_form.med1_time_of_day4.strftime("%I:%M %p") %>
                    <br />
                <% end %>
            </td>
        </tbody>
    </table>

注意：我也尝试过替换@instance_var.nil？与@instance_var.blank？和@instance_var.empty？没有成功。

以防万一需要控制器...

    med_record_forms_controller.rb

    class MedRecordFormsController < ApplicationController
  before_filter :get_resident

  def index
    @med_record_form = @resident.med_record_forms
  end

  def new
    @med_record_form = @resident.med_record_forms.build
  end

  def create
    @med_record_form = @resident.med_record_forms.build(params[:med_record_form])
    if @med_record_form.save
      redirect_to [@resident, @med_record_form] #, flash_class[:success] = "Form was created!"
    else
      render 'new' #, flash[:error] = "There was a problem with the form"
    end
  end

  def show
    @med_record_form = @resident.med_record_forms.find(params[:id])
  end

  def update
    @med_record_form = @resident.med_record_forms.find(params[:id])
    if @med_record_form.update_attributes(params[:med_record_form])
      flash[:success] = "Form updated"
      redirect_to controller: 'residents', action: 'show', id: params[:id]
    else
      render 'edit', flash[:error] = "Unable to update form"
    end
  end

  def edit
    @med_record_form = @resident.med_record_forms.find(params[:id])
  end

  def destroy
    @med_record_form = @resident.med_record_forms.find(params[:id])
    @med_record_form.destroy
    flash[:notice] = "You sure?"
    redirect_to resident_med_record_forms_path
  end

  private
  # get_resident converts the resident_id given by the routing
  # into an @resident object, for use in this controller & coresponding views
  def get_resident
    @resident = Resident.find(params[:resident_id])
  end
end

score 2 · Accepted Answer

这个问题与此类似：Optional time_select with allow_blank defaults to 00:00

我发现 time_select 的默认设置将时间部分设置为空白，但有一个隐藏的日期组件未设置为空白。当您查看参数时，您可以看到这一点：

"my_time(1i)"=>"1", "my_time(2i)"=>"1", "my_time(3i)"=>"1", "my_time(4i)"=>"", "my_time( 5i)"=>""

您需要在控制器中将时间设置为 nil，如下所示：

def create
  @med_record_form = @resident.med_record_forms.build(params[:med_record_form])
  @med_record_form.med1_time_of_day1 = nil if params[:med_record_form]["med1_time_of_day1(4i)"].blank? && 
        params[:med_record_form]["med1_time_of_day1(5i)"].blank?
  if @med_record_form.save
    redirect_to [@resident, @med_record_form] #, flash_class[:success] = "Form was created!"
  else
    render 'new' #, flash[:error] = "There was a problem with the form"
  end
end

ruby-on-rails - time_select 空白字段保存表单提交时的默认时间

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