Rails的ActiveRecord :: StatementInvalid：PG ::錯誤：錯誤：缺少表的FROM-clause條目

我有一個複雜的ActiveRecord查詢，我建立了不同的範圍，這取決於用戶的選擇。我使用2個寶石，這似乎是一起問題，但我找不到誰是之間的罪魁禍首： Texticle（用於Postgresql完整搜索）（2.0.3） Squeel（用於在Active Record查詢中使用ruby語法）squeel 0.9.5）阿雷爾或活動記錄自己Rails的ActiveRecord :: StatementInvalid：PG ::錯誤：錯誤：缺少表的FROM-clause條目

這裏是我的類定義：

class Event < ActiveRecord::Base 
    belongs_to :entity, :class_name => "Entity", :foreign_key => :entity_id 
    belongs_to :place, :class_name => "Entity", :foreign_key => :place_id 

class Entity < ActiveRecord::Base 
    has_many :events, :foreign_key => 'entity_id' 
    has_many :events, :foreign_key => 'place_id'

最後，我查詢：

Event.joins{entity.outer}.joins{place.outer}.includes(:place).includes(:entity).textsearch('anystring'.downcase)

*這是一個ActiveRecord :: Relation對象，哪個CR灰時to_a

調用呢？這使我有以下錯誤：

ActiveRecord::StatementInvalid: PG::Error: ERROR: missing FROM-clause entry for table "entities_events" 
LINE 1: ... AS t1_r30, "entities"."metro_area_id" AS t1_r31, "entities_... 
                  ^
: SELECT "events"."id" AS t0_r0, "events"."name" AS t0_r1, "events"."start_at" AS t0_r2, "events"."end_at" AS t0_r3, "events"."created_at" AS t0_r4, "events"."updated_at" AS t0_r5, "events"."entity_id" AS t0_r6, "events"."calendar_id" AS t0_r7, "events"."location" AS t0_r8, "events"."facebook_id" AS t0_r9, "events"."updated_time" AS t0_r10, "events"."privacy" AS t0_r11, "events"."venue_id" AS t0_r12, "events"."description" AS t0_r13, "events"."venue_city" AS t0_r14, "events"."venue_country" AS t0_r15, "events"."venue_state" AS t0_r16, "events"."venue_longitude" AS t0_r17, "events"."venue_latitude" AS t0_r18, "events"."yahoo_city" AS t0_r19, "events"."yahoo_country" AS t0_r20, "events"."yahoo_state" AS t0_r21, "events"."yahoo_updated_at" AS t0_r22, "events"."fb_updated_at" AS t0_r23, "events"."source_id" AS t0_r24, "events"."source_type" AS t0_r25, "events"."source_url" AS t0_r26, "events"."status" AS t0_r27, "events"."category" AS t0_r28, "events"."place_id" AS t0_r29, "events"."metro_area_id" AS t0_r30, "entities"."id" AS t1_r0, "entities"."image_url" AS t1_r1, "entities"."created_at" AS t1_r2, "entities"."updated_at" AS t1_r3, "entities"."name" AS t1_r4, "entities"."facebook_id" AS t1_r5, "entities"."link" AS t1_r6, "entities"."website" AS t1_r7, "entities"."company_overview" AS t1_r8, "entities"."mission" AS t1_r9, "entities"."category" AS t1_r10, "entities"."picture" AS t1_r11, "entities"."city" AS t1_r12, "entities"."zip" AS t1_r13, "entities"."country" AS t1_r14, "entities"."street" AS t1_r15, "entities"."state" AS t1_r16, "entities"."events_updated_at" AS t1_r17, "entities"."fblikes_updated_at" AS t1_r18, "entities"."fb_updated_at" AS t1_r19, "entities"."source_url" AS t1_r20, "entities"."source_type" AS t1_r21, "entities"."source_id" AS t1_r22, "entities"."place" AS t1_r23, "entities"."latitude" AS t1_r24, "entities"."longitude" AS t1_r25, "entities"."yahoo_city" AS t1_r26, "entities"."yahoo_state" AS t1_r27, "entities"."yahoo_country" AS t1_r28, "entities"."yahoo_updated_at" AS t1_r29, "entities"."fetched_elements_at" AS t1_r30, "entities"."metro_area_id" AS t1_r31, "entities_events"."id" AS t2_r0, "entities_events"."image_url" AS t2_r1, "entities_events"."created_at" AS t2_r2, "entities_events"."updated_at" AS t2_r3, "entities_events"."name" AS t2_r4, "entities_events"."facebook_id" AS t2_r5, "entities_events"."link" AS t2_r6, "entities_events"."website" AS t2_r7, "entities_events"."company_overview" AS t2_r8, "entities_events"."mission" AS t2_r9, "entities_events"."category" AS t2_r10, "entities_events"."picture" AS t2_r11, "entities_events"."city" AS t2_r12, "entities_events"."zip" AS t2_r13, "entities_events"."country" AS t2_r14, "entities_events"."street" AS t2_r15, "entities_events"."state" AS t2_r16, "entities_events"."events_updated_at" AS t2_r17, "entities_events"."fblikes_updated_at" AS t2_r18, "entities_events"."fb_updated_at" AS t2_r19, "entities_events"."source_url" AS t2_r20, "entities_events"."source_type" AS t2_r21, "entities_events"."source_id" AS t2_r22, "entities_events"."place" AS t2_r23, "entities_events"."latitude" AS t2_r24, "entities_events"."longitude" AS t2_r25, "entities_events"."yahoo_city" AS t2_r26, "entities_events"."yahoo_state" AS t2_r27, "entities_events"."yahoo_country" AS t2_r28, "entities_events"."yahoo_updated_at" AS t2_r29, "entities_events"."fetched_elements_at" AS t2_r30, "entities_events"."metro_area_id" AS t2_r31 FROM "events" LEFT OUTER JOIN "entities" ON "entities"."id" = "events"."entity_id" LEFT OUTER JOIN "entities" "places_events" ON "places_events"."id" = "events"."place_id" WHERE (to_tsvector('english', "events"."name"::text) @@ to_tsquery('english', 'canadiens'::text)) ORDER BY "rank0.11630770538778923" DESC 
    from /Users/guillaumenm/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.2.1/lib/active_record/connection_adapters/postgresql_adapter.rb:1106:in `async_exec' 
    from /Users/guillaumenm/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.2.1/lib/active_record/connection_adapters/postgresql_adapter.rb:1106:in `exec_no_cache' 
    from /Users/guillaumenm/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.2.1/lib/active_record/connection_adapters/postgresql_adapter.rb:650:in `block in exec_query' 
    from /Users/guillaumenm/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.2.1/lib/active_record/connection_adapters/abstract_adapter.rb:280:in `block in log' 
    from /Users/guillaumenm/.rvm/gems/ruby-1.9.2-p290/gems/activesupport-3.2.1/lib/active_support/notifications/instrumenter.rb:20:in `instrument' 
    from /Users/guillaumenm/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.2.1/lib/active_record/connection_adapters/abstract_adapter.rb:275:in `log' 
    from /Users/guillaumenm/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.2.1/lib/active_record/connection_adapters/postgresql_adapter.rb:649:in `exec_query' 
    from /Users/guillaumenm/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.2.1/lib/active_record/connection_adapters/postgresql_adapter.rb:1201:in `select' 
    from /Users/guillaumenm/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.2.1/lib/active_record/connection_adapters/abstract/database_statements.rb:16:in `select_all' 
    from /Users/guillaumenm/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.2.1/lib/active_record/connection_adapters/abstract/query_cache.rb:63:in `select_all' 
    from /Users/guillaumenm/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.2.1/lib/active_record/relation/finder_methods.rb:211:in `find_with_associations' 
    from /Users/guillaumenm/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.2.1/lib/active_record/relation.rb:170:in `exec_queries' 
    from /Users/guillaumenm/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.2.1/lib/active_record/relation.rb:159:in `block in to_a' 
    from /Users/guillaumenm/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.2.1/lib/active_record/explain.rb:40:in `logging_query_plan' 
    from /Users/guillaumenm/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.2.1/lib/active_record/relation.rb:158:in `to_a' 
    from /Users/guillaumenm/.rvm/gems/ruby-1.9.2-p290/gems/activerecord-3.2.1/lib/active_record/relation.rb:495:in `inspect' 
    from /Users/guillaumenm/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.2.1/lib/rails/commands/console.rb:47:in `start' 
    from /Users/guillaumenm/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.2.1/lib/rails/commands/console.rb:8:in `start' 
    from /Users/guillaumenm/.rvm/gems/ruby-1.9.2-p290/gems/railties-3.2.1/lib/rails/commands.rb:41:in `<top (required)>' 
    from ./script/rails:6:in `require' 

If I call the to_sql method on the query, I get a working SQL statement like this : 
=> "SELECT \"events\".*, ts_rank(to_tsvector('english', \"events\".\"name\"::text), to_tsquery('english', 'canadiens'::text)) AS \"rank0.7148935848557265\" FROM \"events\" LEFT OUTER JOIN \"entities\" ON \"entities\".\"id\" = \"events\".\"entity_id\" WHERE (to_tsvector('english', \"events\".\"name\"::text) @@ to_tsquery('english', 'canadiens'::text)) AND ((\"events\".\"start_at\" >= '2012-02-19T00:00:00+00:00' AND \"events\".\"start_at\" <= '2012-02-25T23:59:59+00:00')) ORDER BY \"rank0.7148935848557265\" DESC"

是活動記錄和AREL全面負責實施完整的SQL語句？
爲什麼to_sql不會產生相同的結果？
任何強制的方式（沒有提供完整的OUTER JOIN語法）聯接名稱？
我該如何確定捕獲有問題的作品以填寫正確的錯誤報告？我很迷茫，在我的調試器中試圖找到哪些代碼寫入不正確的連接語句||或者帶有無效聯接關聯名稱的錯誤SELECT子句。

感謝

來源

2012-02-23 xlash

多的調試之後，我發現這個問題是倍數:-(。

首先，加入順序必須符合包括順序，因此，2號線，沒有按」牛逼產生相同的SQL查詢。命名別名是不同的。我相信這是一個積極的記錄\ AREL問題，我會標誌。

Event.joins{entity.outer}.joins{place.outer}.includes(:place).includes(:entity)

比

不同

Event.joins{entity.outer}.joins{place.outer}.includes(:entity).includes(:place)

但是，這個問題是透明的，直到我爲我的文本搜索添加了另一個範圍。我的猜測是因爲SQL語句更改爲爲每列添加列別名。該別名也使用了表別名，這與FROM和JOIN子句中的不同。

改變順序，並沒有解決我所有的問題。我最終發現另一個問題，即我的文本全文搜索的SELECT子句從查詢轉到數據庫時被剝離。相反，我得到這個錯誤：

ActiveRecord::StatementInvalid: PG::Error: ERROR: column "rank0.8601929506100121" does not exist 
LINE 1: ...o_tsquery('english', 'canadiens'::text)) ORDER BY "rank0.860...

我也相信這是無論是texticle，squeel或ActiveRecord的/阿雷爾的錯誤，不知道哪一個尚未...

那麼痛苦，我想寫了我自己的SQL語句再一次手動...

來源

2012-02-29 06:35:11 xlash

這嚇壞了醜陋。我遇到了類似的問題。 – jevy 2012-03-14 19:21:59

我所做的是取出包含部分。這是拋出定製選擇語句的部分。我通過SQUEEL插件使用了左外連接，併爲我的「包含」類手動編寫了select語句。最後，我想限制選擇的表現，所以我想，我正處在我想要的地步。所以這個bug最後是ActiveRecord :: includes，並且間接地，Texticle允許包含AR關係對象。 – xlash 2012-03-20 05:07:32

我們使用的是使用arel「where」方法的命名範圍。我們改變它使用舊學校「條件」的方式，它運作良好。以某種方式看起來像一個方法錯誤。 – jevy 2012-03-22 19:53:14

我剛喝了同樣的錯誤上來對我來說，與這行代碼：

SampleItem.joins(:campaign_market).where(campaign_market: {market_id: current_admin_user.market_id})

我的事業遠比上面的一個簡單，joins(:campaign_market)是正確的，因爲它是一個belongs_to /父記錄然而：

.where(campaign_market: {market_id: current_admin_user.market_id})

應該是：

.where(campaign_markets: {market_id: current_admin_user.market_id})

.where()子句總是需要複數表名稱，而不是關聯名稱。

來源

2014-06-03 08:50:03 TomDunning

Rails的ActiveRecord :: StatementInvalid：PG ::錯誤：錯誤：缺少表的FROM-clause條目

回答

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