我正在使用Rails 4.2.4和pg_search 1.0.5。
class Advert < ActiveRecord::Base
include PgSearch
multisearchable :against => [:title, :body]
end
我想在广告记录的:created_at
日期订购pg_search结果。从逻辑上讲,在我看来,以下内容可以起作用(:asc
):
> @pgs = PgSearch.multisearch('55948189').order(created_at: :asc)
PgSearch::Document Load (136.1ms) SELECT "pg_search_documents".* FROM "pg_search_documents" INNER JOIN (SELECT "pg_search_documents"."id" AS pg_search_id, (ts_rank((to_tsvector('simple', coalesce("pg_search_documents"."content"::text, ''))), (to_tsquery('simple', ''' ' || '55948189' || ' ''')), 0)) AS rank FROM "pg_search_documents" WHERE (((to_tsvector('simple', coalesce("pg_search_documents"."content"::text, ''))) @@ (to_tsquery('simple', ''' ' || '55948189' || ' '''))))) AS pg_search_ce9b9dd18c5c0023f2116f ON "pg_search_documents"."id" = pg_search_ce9b9dd18c5c0023f2116f.pg_search_id ORDER BY pg_search_ce9b9dd18c5c0023f2116f.rank DESC, "pg_search_documents"."id" ASC, "pg_search_documents"."created_at" ASC
=> #<ActiveRecord::Relation [
#<PgSearch::Document id: 3148, content: "Aleksandra | Tallinn | 55948189 Simpatichnaja i se...", searchable_id: 3148, searchable_type: "Advert", created_at: "2015-10-01 11:44:06", updated_at: "2015-10-01 11:44:30">,
#<PgSearch::Document id: 3275, content: "Aleksandra | Tallinn | 55948189 Simpatichnaja i se...", searchable_id: 3275, searchable_type: "Advert", created_at: "2015-10-02 11:05:49", updated_at: "2015-10-02 11:28:48">]>
但是相反的顺序(:desc
)会产生相同的结果:
> @pgs = PgSearch.multisearch('55948189').order(created_at: :desc)
PgSearch::Document Load (108.4ms) SELECT "pg_search_documents".* FROM "pg_search_documents" INNER JOIN (SELECT "pg_search_documents"."id" AS pg_search_id, (ts_rank((to_tsvector('simple', coalesce("pg_search_documents"."content"::text, ''))), (to_tsquery('simple', ''' ' || '55948189' || ' ''')), 0)) AS rank FROM "pg_search_documents" WHERE (((to_tsvector('simple', coalesce("pg_search_documents"."content"::text, ''))) @@ (to_tsquery('simple', ''' ' || '55948189' || ' '''))))) AS pg_search_ce9b9dd18c5c0023f2116f ON "pg_search_documents"."id" = pg_search_ce9b9dd18c5c0023f2116f.pg_search_id ORDER BY pg_search_ce9b9dd18c5c0023f2116f.rank DESC, "pg_search_documents"."id" ASC, "pg_search_documents"."created_at" DESC
=> #<ActiveRecord::Relation [
#<PgSearch::Document id: 3148, content: "Aleksandra | Tallinn | 55948189 Simpatichnaja i se...", searchable_id: 3148, searchable_type: "Advert", created_at: "2015-10-01 11:44:06", updated_at: "2015-10-01 11:44:30">,
#<PgSearch::Document id: 3275, content: "Aleksandra | Tallinn | 55948189 Simpatichnaja i se...", searchable_id: 3275, searchable_type: "Advert", created_at: "2015-10-02 11:05:49", updated_at: "2015-10-02 11:28:48">]>
有人可以解释我如何在:created_at
日期之前订购我的搜索结果吗?
更新1 :结果的顺序是否可能由pg_search
修正,并且没有任何方法可以通过'created_at`进行排序?
我现在正在更仔细地阅读文档,并发现这句话:“默认情况下,pg_search根据搜索文本和查询之间的:tsearch相似性对结果进行排名。要使用不同的排名算法,您可以通过a:pg_search_scope的ranking_by选项。“(参见https://github.com/Casecommons/pg_search)
答案 0 :(得分:5)
有一个简单的答案,但它不适用于“多可搜索”。
首先,我需要将“multisarchable”(适用于多个模型)更改为“pg_search_scope”(仅在单个模型中搜索)。
其次,我需要使用:order_within_rank
。由于结果都是搜索字词的100%匹配,因此根据pg_search
,它们具有相同的排名。 :order_within_rank
将次要排名作为决胜局。
class Advert < ActiveRecord::Base
include PgSearch
pg_search_scope :search_by_full_advert,
:against => [:title, :body],
:order_within_rank => "adverts.created_at DESC"
end
答案 1 :(得分:0)
我可能要晚5年参加聚会,但偶然发现了同样的问题,并弄清楚了如何做到这一点。
简短的简短答案-将您的查询(即PgSearch.multisearch('55948189')
)转换为数组。
我的例子:
@results = PgSearch.multisearch(params[:main_search][:query])
虽然无法对@results
进行分组或排序,但是可以使用@results.to_a
进行。
就我而言,我有两种型号-Products
和Manufacturers
(制造商生产产品),我想首先在搜索结果中显示 所有产品结果只有这样所有制造商的结果。
首先,定义一个数组进行排序:
sorting_order = ["Manufacturer", "Product"]
然后
@results.to_a.sort_by { |x| sorting_order.index x.searchable_type }
(注意:serachable_type
是gem迁移生成的PgSearch::Document
的默认列)