Ruby on rails 获取ActiveRecord表的更好方法&x27；s主表（属于'；表）数组_Ruby On Rails_Ruby_Activerecord_Rails Activerecord

Ruby on rails 获取ActiveRecord表的更好方法&x27；s主表（属于'；表）数组

ruby-on-rails ruby activerecord

Ruby on rails 获取ActiveRecord表的更好方法&x27；s主表（属于'；表）数组,ruby-on-rails,ruby,activerecord,rails-activerecord,Ruby On Rails,Ruby,Activerecord,Rails Activerecord,我有一张有很多字段的桌子 [ [ 0] "id", [ 1] "type", [ 2] "title", [ 3] "delivery_fee", [ 4] "price", [ 5] "starting_price", [ 6] "bid_increment", [ 7] "bid_expired_at", [ 8] "address", [ 9] "lat", [10] "lng", [11] "

我有一张有很多字段的桌子

[
    [ 0] "id",
    [ 1] "type",
    [ 2] "title",
    [ 3] "delivery_fee",
    [ 4] "price",
    [ 5] "starting_price",
    [ 6] "bid_increment",
    [ 7] "bid_expired_at",
    [ 8] "address",
    [ 9] "lat",
    [10] "lng",
    [11] "comments_count",
    [12] "clicks_count",
    [13] "detected_labels",
    [14] "deleted_at",
    [15] "created_at",
    [16] "updated_at",
    [17] "user_id",
    [18] "category_id",
    [19] "area_id",
    [20] "detected_labels_cn",
    [21] "tsv",
    [22] "tsv_full",
    [23] "data",
    [24] "stock_count",
    [25] "location_is_visible",
    [26] "make_offer_disabled_at",
    [27] "favorites_count",
    [28] "display_index"
]

我想做的是：

获取此表属于表名称

以下是我的解决方案：

GoodsItem.column_names.grep(/.*(_id)$/).map {|x| x[/(.*)_id/, 1] 
# Or
GoodsItem.column_names.map {|x| x.dup.sub!(/_id/, '') }.compact



[
    [0] "user",
    [1] "category",
    [2] "area"
]

这是不够的。因为两个几乎相同的regexp匹配得到由于我使用了

冻结字符串

问题是:

Rails提供了任何方法来获取此

所属的列表


如果没有，有没有比我更好的解决方案？
基本上，我想要一个方法来满足两个条件：

字段必须以\u id
获取匹配的内容，但部分\u id

谢谢。
更好的答案是：
GoodsItem.column_names.map {|x| x[/(.*)_id/, 1] }.compact

GoodsItem.column_names.grep(/(.*)_id$/) { $1 }

更好的答案是：
GoodsItem.column_names.map {|x| x[/(.*)_id/, 1] }.compact

GoodsItem.column_names.grep(/(.*)_id$/) { $1 }

尝试GoodsItem.reflections
-GoodsItem.reflections返回有很多并且属于，我想要的只是属于表名。你看了那页了吗GoodsItem。反映所有的关联（：所属）
都能做到。@AlexandreAngelim，是的，成功了。GoodsItem.反映所有关联（：所属）。地图（&:name）得到我想要的，谢谢