我在数据库中有一个名为 provideers 的表格,其类型栏名为 provider_type 。 provider_type 可以是以下之一:
我想创建一个从 Sequel:: Model 继承的类别,称为 Center 和名为 Sponsor 的类别。 由此得出的方法将覆盖相应类别的所有查询,其范围为 prover_type=center 或 provider_type=赞助人 。
我这样做并非100%必要,但如果可能的话,那将是理想的。
您想要单位表继承插件 :
class Provider < Sequel::Model
plugin :single_table_inheritance, :provider_type
end
class Center < Provider
end
class Sponsor < Provider
end
这将有效, 但只有在提供方类型列完全匹配“ Center” 或“ sponsor” 时才会有效 。 否则, 您可能需要在插件呼叫中添加一个 : model_ map 选项。 此插件上的文档位于 < a href=> http:// sequel.jeremeyevans. net/ rdoc- plugins/ class/ Sequel/ Plugins/ Single TableInheritance. html" rel=“ nofol” >http:// sequel.jeemyevans. net/rdoc- plugins/ class/ Sequel/ Plugins/ Single TableInheritance. html 。
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