[英]PostgreSQL error when grouping and search with full text search in SmartListing Gem
I'm using smartlisting gem with postgresql in a rails app. 我在rails应用程序中使用smartgisting gem和postgresql。 The table shows a list of elements result of an association that in some cases the elements can repeat, but I need to show that element only once in the table, but when I add a DISTINCT or uniq to the active record it transforms in an array and smartlisting shows and error. 该表显示了一个关联结果的元素列表,在某些情况下元素可以重复,但是我需要在表中只显示该元素一次,但是当我将DISTINCT或uniq添加到活动记录时,它会转换为数组和智能列表显示和错误。 Then I tried to solve it using a gruop, and IT WORKS! 然后我尝试使用gruop解决它,它的工作原理! but when I tried to do a fulltext search using pg_scope, the pg query crash. 但是当我尝试使用pg_scope进行全文搜索时,pg查询崩溃了。 Here the code: 这里的代码:
class Prospect < ActiveRecord::Base
include PgSearch
pg_search_scope :search_by_name,
against: [:name, :father_last_name, :mother_last_name],
associated_against: { user: [:first_name, :father_last_name,
:mother_last_name] },
ignoring: :accents
has_many :projects, through: :project_prospects, dependent: :destroy
.
.
.
class User < ActiveRecord::Base
has_many :project_prospect
has_many :projects, through: :user_projects, dependent: :nullify
end
The query 查询
search = User.find(id).prospects.select("prospects.*").group("prospects.id")
search = search.search_query("Say my name") if search_full_text.present?
The group works to delete duplicates in the activerecord but when the full text search is needed I get the next error 该组用于删除活动记录中的重复项,但是当需要全文搜索时,我会收到下一个错误
PG::GroupingError: ERROR: column "pg_search_ece0055f6ad1de91cd168e.rank" must appear in
the GROUP BY clause or be used in an aggregate function
LINE 1: ...168e.pg_search_id GROUP BY prospects.id ORDER BY pg_search_...
After hours searching the only solution for this problem was make the group after the full text search and add a variable named 'rank' to the query in the SELECT, like this: 在数小时后搜索此问题的唯一解决方案是在全文搜索后创建组,并在SELECT中向查询添加名为“rank”的变量,如下所示:
search = User.find(id).prospects
if search_full_text.present?
search = search.search_query("Say my name")
.select("prospects.*").group("prospects.id, rank")
else
search = search.select("prospects.*").group("prospects.id")
end
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