如何在每次单击按钮时更新 table 中的 'status' 值

Question

我想在单击每个按钮时将 properties table 中的 status 值更新为（1 或 2 或 3 或 4）。

这些是我在视图文件中的按钮：

<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

我的状态列迁移文件 properties table:

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

当我点击 No response 按钮时，出现 ArgumentError:

'4' is not a valid status

Answer 1

从错误消息来看，您似乎使用了 enum on the status column. You can't use raw values (the integer part of the enum value) with enums unless you skip object instantiation (using update_all, or update_columns，例如）。

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

在approve中，您需要这样更新对象：

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

而不是

@property.update_attributes(status: 4)

这假设您已经声明了您的枚举：

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

您还可以在您的视图中自动生成 link：

<% 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 %>

并简化控制器代码：

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

并将即显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，考虑对您的列使用默认值。

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

如何在每次单击按钮时更新 table 中的 'status' 值

How to update 'status' value in table on each button click

activerecord

ruby-on-rails

ruby-on-rails-3