如何在每次单击按钮时更新表中的“status”值

时间:2016-02-24 07:04:09

标签: ruby-on-rails ruby-on-rails-3 activerecord

当我点击每个按钮时,我想将status表中的properties值更新为(1或2或3或4)。

这些是我的视图文件中的按钮:

<td><%= link_to("Waiting for Response", rms_property_approve_property_path(property, {:status => 'Waiting for Response'}), method: :patch, class: "btn btn-success", "data-no-turbolink" => true) %><td>
<td><%= link_to("No Response", rms_property_approve_property_path(property, {:status => 'No Response'}), method: :patch, class: "btn btn-danger", "data-no-turbolink" => true) %><td>
<td><%= link_to("Registered", rms_property_approve_property_path(property, {:status => 'Registered'}), method: :patch, class: "btn btn-success", "data-no-turbolink" => true) %><td>
<td><%= link_to("Not Interested", rms_property_approve_property_path(property, {:status => 'Not Interested'}), method: :patch, class: "btn btn-danger", "data-no-turbolink" => true) %><td>

我的properties_controller.rb

  def approve
    @property = Property.find(params[:property_id])
    if params[:status]== 'Registered'
       @property.update_attributes(:status => 1)
       redirect_to :back, flash: {notice: "Property has been Registered."}
    elsif params[:status]== 'Not Interested'
       @property.update_attributes(:status => 2)
       redirect_to :back, flash: {notice: "Not Interested."}
    elsif params[:status]== 'Waiting for Response'
       @property.update_attributes(:status => 3)
       redirect_to :back, flash: {notice: "Waiting for Response"}
    elsif params[:status]== 'No Response'
       @property.update_attributes(:status => 4)
       redirect_to :back, flash: {notice: "No Response."}
    end
  end

我在properties表中的状态列的迁移文件:

class AddColumnStatusInProperties < ActiveRecord::Migration
  def change
     add_column :properties, :status, :string
  end
end

当我点击No response按钮时,我收到一个ArgumentError:

'4' is not a valid status

enter image description here

1 个答案:

答案 0 :(得分:4)

根据错误消息判断,您似乎在status列上使用了enum。除非您跳过对象实例化(例如,使用update_allupdate_columns),否则不能将原始值(枚举值的整数部分)与枚举一起使用。< / p>

如果您实例化对象,则必须使用枚举值(值为:registered,而原始值为1)。

approve中,您需要更新对象:

# `:registered` should be the enum value, not the number
@property.update_attributes(status: :registered)

而不是

@property.update_attributes(status: 4)

这假设你已经声明了你的枚举:

class Property < ActiveRecord::Base
  enum status: {
    registered: 1,
    not_interested: 2,
    waiting_for_response: 3, # consider renaming to `awaiting_response`
    registered: 4
  }
end

您应该将迁移中的列类型更改为integer。使用字符串会导致奇怪的错误。

rails g migration change_status_column_type_in_properties

class ChangeStatusColumnTypeInProperties < ActiveRecord::Migration
  def change
     change_column :properties, :status, :integer
  end
end

您还可以在视图中自动生成链接:

<% Property.statuses.each_key do |name| %>
  <%= link_to name, rms_property_approve_property_path(property, {status: name}), method: :patch, class: "btn btn-danger", "data-no-turbolink" => true) %>
<% end %>

简化控制器代码:

def approve
  @property = Property.find(params[:property_id])
  @property.update!(status: params[:status])
  redirect_to :back, notice: t(".#{params[:status]}")
end

将flash消息添加到您的语言环境文件中。例如:

en:
  rms:
    properties:
      approve:
        registered: "Property registered"
        waiting_for_response: "..."

最后,请考虑使用列的默认值。

change_column :properties, :status, :integer, null: false, default: 3