ActiveRecord :: StatementInvalid，PG :: UndefinedTable错误，但生成的SQL有效

这令人非常沮丧。 我正在尝试通过工作得到一个has_many，我想我太接近这个看到一些非常明显的东西了。 每个步骤都正常工作，并且Rails生成的SQL可以正常工作，但在控制台中它不是一起工作的。

关于整个设置的一个奇怪的事情是salesforce架构中有几个表，而tablename和主键不是标准的。 这是基本结构：

class Contact self.table_name = 'salesforce.contact' self.primary_key = 'sfid' has_many :content_accesses has_many :inventories, through: :content_accesses # I've tried inventory and inventorys, just to ensure it's not Rails magic end class ContentAccess belongs_to :inventory belongs_to :contact end class Inventory self.table_name = 'salesforce.inventory__c' self.primary_key = 'sfid' has_many :content_accesses, foreign_key: 'inventory_id' end 

作品：

 c = Contact.first c.content_accesses # works, gives the related items c.content_accesses.first.inventory # works, gives the related Inventory item 

错误：

 c.inventories # Gives: # ActiveRecord::StatementInvalid (PG::UndefinedTable: ERROR: relation "content_accesses" does not exist) # LINE 1: ..._c".* FROM "salesforce"."inventory__c" INNER JOIN "content_a... # ^ # : SELECT "salesforce"."inventory__c".* FROM "salesforce"."inventory__c" INNER JOIN "content_accesses" ON "salesforce"."inventory__c"."sfid" = "content_accesses"."inventory_id" WHERE "content_accesses"."contact_id" = $1 LIMIT $2 

但是，当我通过Postico运行该查询时，它运行正常。 🤬

编辑添加：

• 我将content_accesses移动到salesforce架构中，并在模型上正确设置了self.table_name，但问题仍然存在。 因此，我不认为这与跨架构有关。
• 这只会让我对这个问题更加困惑。 🙁

表格的DDL：

 CREATE TABLE salesforce.inventory__c ( createddate timestamp without time zone, isdeleted boolean, name character varying(80), systemmodstamp timestamp without time zone, inventory_unique_name__c character varying(255), sfid character varying(18), id integer DEFAULT nextval('salesforce.inventory__c_id_seq'::regclass) PRIMARY KEY, _hc_lastop character varying(32), _hc_err text ); CREATE UNIQUE INDEX inventory__c_pkey ON salesforce.inventory__c(id int4_ops); CREATE INDEX hc_idx_inventory__c_systemmodstamp ON salesforce.inventory__c(systemmodstamp timestamp_ops); CREATE UNIQUE INDEX hcu_idx_inventory__c_sfid ON salesforce.inventory__c(sfid text_ops); CREATE TABLE salesforce.contact ( lastname character varying(80), mailingpostalcode character varying(20), accountid character varying(18), assistantname character varying(40), name character varying(121), mobilephone character varying(40), birthdate date, phone character varying(40), mailingstreet character varying(255), isdeleted boolean, assistantphone character varying(40), systemmodstamp timestamp without time zone, mailingstatecode character varying(10), createddate timestamp without time zone, mailingcity character varying(40), salutation character varying(40), title character varying(128), mailingcountrycode character varying(10), firstname character varying(40), email character varying(80), sfid character varying(18), id integer DEFAULT nextval('salesforce.contact_id_seq'::regclass) PRIMARY KEY, _hc_lastop character varying(32), _hc_err text ); CREATE UNIQUE INDEX contact_pkey ON salesforce.contact(id int4_ops); CREATE INDEX hc_idx_contact_systemmodstamp ON salesforce.contact(systemmodstamp timestamp_ops); CREATE UNIQUE INDEX hcu_idx_contact_sfid ON salesforce.contact(sfid text_ops); CREATE TABLE content_accesses ( id BIGSERIAL PRIMARY KEY, inventory_id character varying(20), contact_id character varying(20), created_at timestamp without time zone NOT NULL, updated_at timestamp without time zone NOT NULL ); CREATE UNIQUE INDEX content_accesses_pkey ON content_accesses(id int8_ops); 

编辑2：作为调试的一部分，我尝试在控制台中运行生成的查询：

• 如果我使用ActiveRecord::Base.connection.execute运行生成的查询，则查询有效。
• 如果我通过Contact.connection.execute运行它会给出相同的错误。

感觉Rails没有想出什么，但我无法弄清楚在哪里，为什么或者什么。

编辑3：根据要求，框架跟踪：

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lib/active_record/connection_adapters/abstract/query_cache.rb:101:in `select_all' activerecord (5.2.0) lib/active_record/querying.rb:41:in `find_by_sql' activerecord (5.2.0) lib/active_record/relation.rb:554:in `block in exec_queries' activerecord (5.2.0) lib/active_record/relation.rb:578:in `skip_query_cache_if_necessary' activerecord (5.2.0) lib/active_record/relation.rb:542:in `exec_queries' activerecord (5.2.0) lib/active_record/association_relation.rb:34:in `exec_queries' activerecord (5.2.0) lib/active_record/relation.rb:414:in `load' activerecord (5.2.0) lib/active_record/relation.rb:200:in `records' activerecord (5.2.0) lib/active_record/relation.rb:195:in `to_ary' activerecord (5.2.0) lib/active_record/relation/finder_methods.rb:530:in `find_nth_with_limit' activerecord (5.2.0) lib/active_record/associations/collection_proxy.rb:1136:in `find_nth_with_limit' activerecord (5.2.0) lib/active_record/relation/finder_methods.rb:515:in `find_nth' activerecord (5.2.0) lib/active_record/relation/finder_methods.rb:125:in `first' actionview (5.2.0) lib/action_view/template.rb:159:in `block in render' activesupport (5.2.0) lib/active_support/notifications.rb:170:in `instrument' actionview (5.2.0) lib/action_view/template.rb:354:in `instrument_render_template' actionview (5.2.0) lib/action_view/template.rb:157:in `render' actionview (5.2.0) lib/action_view/renderer/template_renderer.rb:54:in `block (2 levels) in render_template' actionview (5.2.0) lib/action_view/renderer/abstract_renderer.rb:44:in `block in instrument' activesupport (5.2.0) lib/active_support/notifications.rb:168:in `block in instrument' activesupport (5.2.0) lib/active_support/notifications/instrumenter.rb:23:in `instrument' activesupport (5.2.0) lib/active_support/notifications.rb:168:in `instrument' actionview (5.2.0) lib/action_view/renderer/abstract_renderer.rb:43:in `instrument' actionview (5.2.0) lib/action_view/renderer/template_renderer.rb:53:in `block in render_template' 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lib/action_controller/metal/instrumentation.rb:46:in `block (2 levels) in render' activesupport (5.2.0) lib/active_support/core_ext/benchmark.rb:14:in `block in ms' /Users/timsullivan/.rvm/rubies/ruby-2.5.1/lib/ruby/2.5.0/benchmark.rb:308:in `realtime' activesupport (5.2.0) lib/active_support/core_ext/benchmark.rb:14:in `ms' actionpack (5.2.0) lib/action_controller/metal/instrumentation.rb:46:in `block in render' actionpack (5.2.0) lib/action_controller/metal/instrumentation.rb:87:in `cleanup_view_runtime' activerecord (5.2.0) lib/active_record/railties/controller_runtime.rb:31:in `cleanup_view_runtime' actionpack (5.2.0) lib/action_controller/metal/instrumentation.rb:45:in `render' actionpack (5.2.0) lib/action_controller/metal/implicit_render.rb:35:in `default_render' actionpack (5.2.0) lib/action_controller/metal/basic_implicit_render.rb:6:in `block in send_action' actionpack (5.2.0) lib/action_controller/metal/basic_implicit_render.rb:6:in `tap' actionpack (5.2.0) lib/action_controller/metal/basic_implicit_render.rb:6:in `send_action' actionpack (5.2.0) lib/abstract_controller/base.rb:194:in `process_action' actionpack (5.2.0) lib/action_controller/metal/rendering.rb:30:in `process_action' actionpack (5.2.0) lib/abstract_controller/callbacks.rb:42:in `block in process_action' activesupport (5.2.0) lib/active_support/callbacks.rb:132:in `run_callbacks' actionpack (5.2.0) lib/abstract_controller/callbacks.rb:41:in `process_action' actionpack (5.2.0) lib/action_controller/metal/rescue.rb:22:in `process_action' actionpack (5.2.0) lib/action_controller/metal/instrumentation.rb:34:in `block in process_action' activesupport (5.2.0) lib/active_support/notifications.rb:168:in `block in instrument' activesupport (5.2.0) lib/active_support/notifications/instrumenter.rb:23:in `instrument' activesupport (5.2.0) lib/active_support/notifications.rb:168:in `instrument' actionpack (5.2.0) lib/action_controller/metal/instrumentation.rb:32:in `process_action' actionpack (5.2.0) lib/action_controller/metal/params_wrapper.rb:256:in `process_action' activerecord (5.2.0) lib/active_record/railties/controller_runtime.rb:24:in `process_action' actionpack (5.2.0) lib/abstract_controller/base.rb:134:in `process' actionview (5.2.0) lib/action_view/rendering.rb:32:in `process' actionpack (5.2.0) lib/action_controller/metal.rb:191:in `dispatch' actionpack (5.2.0) lib/action_controller/metal.rb:252:in `dispatch' actionpack (5.2.0) lib/action_dispatch/routing/route_set.rb:52:in `dispatch' actionpack (5.2.0) lib/action_dispatch/routing/route_set.rb:34:in `serve' actionpack (5.2.0) lib/action_dispatch/journey/router.rb:52:in `block in serve' actionpack (5.2.0) lib/action_dispatch/journey/router.rb:35:in `each' actionpack (5.2.0) lib/action_dispatch/journey/router.rb:35:in `serve' actionpack (5.2.0) lib/action_dispatch/routing/route_set.rb:840:in `call' warden (1.2.7) lib/warden/manager.rb:36:in `block in call' warden (1.2.7) lib/warden/manager.rb:35:in `catch' warden (1.2.7) lib/warden/manager.rb:35:in `call' rack (2.0.5) lib/rack/tempfile_reaper.rb:15:in `call' rack (2.0.5) lib/rack/etag.rb:25:in `call' rack (2.0.5) lib/rack/conditional_get.rb:25:in `call' rack (2.0.5) lib/rack/head.rb:12:in `call' actionpack (5.2.0) lib/action_dispatch/http/content_security_policy.rb:18:in `call' rack (2.0.5) lib/rack/session/abstract/id.rb:232:in `context' rack (2.0.5) lib/rack/session/abstract/id.rb:226:in `call' actionpack (5.2.0) lib/action_dispatch/middleware/cookies.rb:670:in `call' activerecord (5.2.0) lib/active_record/migration.rb:559:in `call' actionpack (5.2.0) lib/action_dispatch/middleware/callbacks.rb:28:in `block in call' activesupport (5.2.0) lib/active_support/callbacks.rb:98:in `run_callbacks' actionpack (5.2.0) lib/action_dispatch/middleware/callbacks.rb:26:in `call' actionpack (5.2.0) lib/action_dispatch/middleware/executor.rb:14:in `call' airbrake (7.2.1) lib/airbrake/rack/middleware.rb:52:in `call' actionpack (5.2.0) lib/action_dispatch/middleware/debug_exceptions.rb:61:in `call' web-console (3.6.1) lib/web_console/middleware.rb:135:in `call_app' web-console (3.6.1) lib/web_console/middleware.rb:30:in `block in call' web-console (3.6.1) lib/web_console/middleware.rb:20:in `catch' web-console (3.6.1) lib/web_console/middleware.rb:20:in `call' actionpack (5.2.0) lib/action_dispatch/middleware/show_exceptions.rb:33:in `call' railties (5.2.0) lib/rails/rack/logger.rb:38:in `call_app' railties (5.2.0) lib/rails/rack/logger.rb:26:in `block in call' activesupport (5.2.0) lib/active_support/tagged_logging.rb:71:in `block in tagged' activesupport (5.2.0) lib/active_support/tagged_logging.rb:28:in `tagged' activesupport (5.2.0) lib/active_support/tagged_logging.rb:71:in `tagged' railties (5.2.0) lib/rails/rack/logger.rb:26:in `call' sprockets-rails (3.2.1) lib/sprockets/rails/quiet_assets.rb:13:in `call' actionpack (5.2.0) lib/action_dispatch/middleware/remote_ip.rb:81:in `call' actionpack (5.2.0) lib/action_dispatch/middleware/request_id.rb:27:in `call' rack (2.0.5) lib/rack/method_override.rb:22:in `call' rack (2.0.5) lib/rack/runtime.rb:22:in `call' activesupport (5.2.0) lib/active_support/cache/strategy/local_cache_middleware.rb:29:in `call' actionpack (5.2.0) lib/action_dispatch/middleware/executor.rb:14:in `call' actionpack (5.2.0) lib/action_dispatch/middleware/static.rb:127:in `call' rack (2.0.5) lib/rack/sendfile.rb:111:in `call' webpacker (3.4.3) lib/webpacker/dev_server_proxy.rb:18:in `perform_request' rack-proxy (0.6.4) lib/rack/proxy.rb:57:in `call' railties (5.2.0) lib/rails/engine.rb:524:in `call' puma (3.11.4) lib/puma/configuration.rb:225:in `call' puma (3.11.4) lib/puma/server.rb:632:in `handle_request' puma (3.11.4) lib/puma/server.rb:446:in `process_client' puma (3.11.4) lib/puma/server.rb:306:in `block in run' puma (3.11.4) lib/puma/thread_pool.rb:120:in `block in spawn_thread' 

Answer 1

既然你说，当你直接调用生成的SQL时，问题根就在于将返回的数据映射回Objects的过程中。 即使您的设置看起来很好，但它似乎非常不标准，所以我会尝试给出更多关于关联如何属于一起的提示。

首先，您应该为您的through关系（docs）设置一个source ：

 has_many :inventories, through: :content_accesses, source: :inventory 

如果仍然没有为rails提供正确的线索，您可以尝试在其他belongs_to和has_many关联上设置inverse_of ， foreign_key ， primary_key甚至class_name ，以便为rails提供所需的提示。 很难说有什么可能有用，但在非标准设置中，您有时会遇到自动推断名称的某些问题。

Answer 2

令人尴尬的是，这是一个配置问题。 salesforce架构的内容是从服务器加载的，而不是从我的本地数据库加载的。 这是我没想过要重复检查的一件事，本地salesforce架构的内容有效，因为我从服务器恢复了备份。

将正确的HEROKUCONNECT_URL设置到我当地的Postgres服务器修复了这个问题，但我会通过将ContentAccess的表移动到Salesforce，然后从服务器创建数据库的新副本供本地使用来解决它。

如果你想进一步嘲笑我的愚蠢，你可以查看我的后续问题 ，这是一个与PBKAC不同但相似的例子。