如何搜索一长串属性并将其与 fontawesome 图标匹配？答案

【问题标题】：How do I search through a long list of attributes and match it to fontawesome icon?如何搜索一长串属性并将其与 fontawesome 图标匹配？
【发布时间】：2019-06-11 09:59:29
【问题描述】：

我有一个PropertyFeatureOption 模型，它的数据如下所示：

+-----+-------------------------+--------+----------+---------+-------------------------+-------------------------+
| id  | name                    | shared | exterior | amenity | created_at              | updated_at              |
+-----+-------------------------+--------+----------+---------+-------------------------+-------------------------+
| 101 | Dining Room             | false  | false    | false   | 2014-01-30 00:07:36 UTC | 2014-01-30 00:07:36 UTC |
| 102 | Security                | false  | false    | false   | 2014-01-30 00:07:36 UTC | 2014-01-30 00:07:36 UTC |
| 103 | Common Area             | false  | false    | false   | 2014-01-30 00:07:36 UTC | 2014-01-30 00:07:36 UTC |
| 104 | Swimming Pool           | false  | false    | false   | 2014-01-30 00:07:36 UTC | 2014-01-30 00:07:36 UTC |
| 105 | Automatic Gate          | false  | false    | false   | 2014-01-30 00:07:36 UTC | 2014-01-30 00:07:36 UTC |
| 106 | Panic Button            | false  | false    | false   | 2014-01-30 00:07:36 UTC | 2014-01-30 00:07:36 UTC |
| 107 | Car Port                | false  | false    | false   | 2014-01-30 00:07:36 UTC | 2014-01-30 00:07:36 UTC |
| 108 | Electric Generator      | false  | false    | false   | 2014-01-30 00:07:36 UTC | 2014-01-30 00:07:36 UTC |
| 109 | Water Pump              | false  | false    | false   | 2014-01-30 00:07:36 UTC | 2014-01-30 00:07:36 UTC |
| 110 | Air Conditioning        | false  | false    | false   | 2014-01-30 00:07:36 UTC | 2014-01-30 00:07:36 UTC |
| 111 | Cable                   | false  | false    | false   | 2014-01-30 00:07:36 UTC | 2014-01-30 00:07:36 UTC |
| 112 | Kitchen                 | false  | false    | false   | 2014-01-30 00:07:36 UTC | 2014-01-30 00:07:36 UTC |
| 113 | Security Guard          | false  | false    | false   | 2014-01-30 00:07:36 UTC | 2014-01-30 00:07:36 UTC |
| 114 | Family Room             | false  | false    | false   | 2014-01-30 00:07:37 UTC | 2014-01-30 00:07:37 UTC |
| 115 | Other Room              | false  | false    | false   | 2014-01-30 00:07:37 UTC | 2014-01-30 00:07:37 UTC |
| 116 | Patio                   | false  | false    | false   | 2014-01-30 00:07:37 UTC | 2014-01-30 00:07:37 UTC |
| 117 | Electronic Security     | false  | false    | false   | 2014-01-30 00:07:37 UTC | 2014-01-30 00:07:37 UTC |
| 118 | Garage                  | false  | false    | false   | 2014-01-30 00:07:37 UTC | 2014-01-30 00:07:37 UTC |
| 119 | Dish                    | false  | false    | false   | 2014-01-30 00:07:37 UTC | 2014-01-30 00:07:37 UTC |
| 120 | Furnished               | false  | false    | false   | 2014-01-30 00:07:37 UTC | 2014-01-30 00:07:37 UTC |
| 121 | Living Room             | false  | false    | false   | 2014-01-30 00:07:37 UTC | 2014-01-30 00:07:37 UTC |
| 122 | Canteen                 | false  | false    | false   | 2014-01-30 00:07:37 UTC | 2014-01-30 00:07:37 UTC |
| 123 | Telephone Lines         | false  | false    | false   | 2014-01-30 00:07:37 UTC | 2014-01-30 00:07:37 UTC |
| 124 | Restroom                | false  | false    | false   | 2014-01-30 00:07:38 UTC | 2014-01-30 00:07:38 UTC |
| 125 | Powder Room             | false  | false    | false   | 2014-01-30 00:07:38 UTC | 2014-01-30 00:07:38 UTC |
| 126 | Den/Study               | false  | false    | false   | 2014-01-30 00:07:38 UTC | 2014-01-30 00:07:38 UTC |
| 127 | Water Tank              | false  | false    | false   | 2014-01-30 00:07:38 UTC | 2014-01-30 00:07:38 UTC |
| 128 | Partitions              | false  | false    | false   | 2014-01-30 00:07:39 UTC | 2014-01-30 00:07:39 UTC |
| 129 | Fully Fenced            | false  | false    | false   | 2014-02-27 06:31:34 UTC | 2014-02-27 06:31:34 UTC |
| 130 | Garden Area             | false  | false    | false   | 2014-02-27 06:31:34 UTC | 2014-02-27 06:31:34 UTC |
| 131 | Ceiling Fans            | false  | false    | false   | 2014-02-27 06:31:34 UTC | 2014-02-27 06:31:34 UTC |
| 132 | Grilled                 | false  | false    | false   | 2014-02-27 06:31:34 UTC | 2014-02-27 06:31:34 UTC |
| 133 | Kitchen Built-in(s)     | false  | false    | false   | 2014-02-27 06:31:34 UTC | 2014-02-27 06:31:34 UTC |
| 134 | Main Level Entry        | false  | false    | false   | 2014-02-27 06:31:34 UTC | 2014-02-27 06:31:34 UTC |
| 135 | Unfurnished             | false  | false    | false   | 2014-02-27 06:31:34 UTC | 2014-02-27 06:31:34 UTC |
| 136 | Barn                    | false  | false    | false   | 2014-02-27 06:31:34 UTC | 2014-02-27 06:31:34 UTC |

总共有 117 条记录。

我要做的是在Property#Show 页面上，这取决于我正在查看的property 对象上是否存在任何这些，我想显示与这些条目相关的字体真棒图标。

所以，基本上我需要硬编码这些记录的不同名称之间的链接，以及各种字体很棒的图标。

例如，如果property 有一个property_feature_option.name.eql? "Car Port"（即上表中的ID=107），我想显示fa fa-car。 property_feature_options 可以有多种映射到字体很棒的图标名称。

例如Panic Button, Security Guard & Electronic Security 可以转到fa fa-bullhorn（只是一个例子）。

我该如何处理？不太确定从哪里开始。

【问题讨论】：

标签： ruby-on-rails ruby ruby-on-rails-3.2 font-awesome

【解决方案1】：

一个选项是@iGian 所说的，将它们放在哈希中。为了保持整洁，您应该将它们放入单独的命名空间中：

module FeatureIconizer
  module_function

  ICONS = {
    'Car Port' => 'fa-car',
    'Panic Button' => 'fa-bullhorn',
    'Security Guard' => 'fa-bullhorn',
    ...
  }

  DEFAULT = 'fa-house'

  def icon_class(feature)
    'fa ' + ICONS.fetch(feature.name, DEFAULT)
  end
end

另一个选项，正如您在 DB 中定义的功能一样，也是在 DB 中添加图标。这样一来，您无需部署即可更改一个图标。

【讨论】：

有趣，您的意思是在该表中为Icon Name 添加一列，然后在查询属性特征时只查询该列？这是一个有趣的选择。
是的。这主要取决于您是否将图标映射视为数据的一部分，以及您不会过多地使用错误 SQL 的能力。
是的，这是一个非常优雅的解决方案，我更喜欢它。它适用于这个特定的应用程序。

【解决方案2】：

我可能会做这样的事情，我定义了一个纯 Ruby 类只是为了展示，但你可以针对 Rails 进行调整。

class PropertyFeatureOption
  attr_reader :name

  ICON_MAP  = { "fa fa-car" => ["Car Port"], "fa fa-bullhorn" => ["Panic Button", "Security Guard",  "Electronic Security"] }.freeze

  def initialize(name)
    @name = name
  end

  def icon
    icon = ICON_MAP.select { |k, v| v.include? name }.keys.first || "fa fa-whathever"
    icon.to_s
  end

end

property_feature_option = PropertyFeatureOption.new("Panic Button")
property_feature_option.icon #=> "fa fa-bullhorn"

property_feature_option = PropertyFeatureOption.new("Not in list")
property_feature_option.icon #=> "fa fa-whathever"

【讨论】：

您似乎在反向使用哈希。哈希是为了查找而设计的，所以切换键和值不是更有意义，然后您可以简单地使用ICON_MAP[name] 查找它们？
@DaveSlutzkin，是的，你是对的，但我想让 ICON_MAP 哈希保持简单，因为它是硬编码的。
我喜欢这个建议，但对于我的特殊情况，我更喜欢@rewritten 的回答。不过感谢您的建议！