我正在使用Postgres全文搜索，当有人输入一个无法查询的查询时，我似乎无法挽救该错误。这是我得到一个例子的错误：
Started GET "/products/search?query=asd+()" for 127.0.0.1 at 2014-02-04 07:46:52 -0600
Processing by ProductsController#search as JSON
Parameters: {"query"=>"asd ()"}
User Load (0.6ms) SELECT "users".* FROM "users" WHERE "users"."id" = 1364 LIMIT 1
Account Load (0.6ms) SELECT "accounts".* FROM "accounts" WHERE "accounts"."id" = 2051 LIMIT 1
Product Load (4.0ms) SELECT id, brand, style_description, style_number, price_per FROM "products" WHERE (to_tsvector('english', style_description) @@ to_tsquery('asd & ():*') or to_tsvector('english', style_number) @@ to_tsquery('asd & ():*') or to_tsvector('english', brand) @@ to_tsquery('asd & ():*')) AND (account_id = 2051) LIMIT 8
PG::SyntaxError: ERROR: syntax error in tsquery: "asd & ():*"
: SELECT id, brand, style_description, style_number, price_per FROM "products" WHERE (to_tsvector('english', style_description) @@ to_tsquery('asd & ():*') or to_tsvector('english', style_number) @@ to_tsquery('asd & ():*') or to_tsvector('english', brand) @@ to_tsquery('asd & ():*')) AND (account_id = 2051) LIMIT 8
Completed 500 Internal Server Error in 443ms
ActiveRecord::StatementInvalid - PG::SyntaxError: ERROR: syntax error in tsquery: "asd & ():*"
: SELECT id, brand, style_description, style_number, price_per FROM "products" WHERE (to_tsvector('english', style_description) @@ to_tsquery('asd & ():*') or to_tsvector('english', style_number) @@ to_tsquery('asd & ():*') or to_tsvector('english', brand) @@ to_tsquery('asd & ():*')) AND (account_id = 2051) LIMIT 8:
activerecord (3.2.14) lib/active_record/connection_adapters/abstract_adapter.rb:285:in `rescue in log'
activerecord (3.2.14) lib/active_record/connection_adapters/abstract_adapter.rb:280:in `log'
newrelic_rpm (3.7.1.188) lib/new_relic/agent/instrumentation/active_record.rb:46:in `block in log_with_newrelic_instrumentation'
newrelic_rpm (3.7.1.188) lib/new_relic/agent/method_tracer.rb:276:in `trace_execution_scoped'
newrelic_rpm (3.7.1.188) lib/new_relic/agent/instrumentation/active_record.rb:43:in `log_with_newrelic_instrumentation'
activerecord (3.2.14) lib/active_record/connection_adapters/postgresql_adapter.rb:659:in `exec_query'
activerecord (3.2.14) lib/active_record/connection_adapters/postgresql_adapter.rb:1262:in `select'
activerecord (3.2.14) lib/active_record/connection_adapters/abstract/database_statements.rb:18:in `select_all'
activerecord (3.2.14) lib/active_record/connection_adapters/abstract/query_cache.rb:61:in `block in select_all'
activerecord (3.2.14) lib/active_record/connection_adapters/abstract/query_cache.rb:75:in `cache_sql'
activerecord (3.2.14) lib/active_record/connection_adapters/abstract/query_cache.rb:61:in `select_all'
activerecord (3.2.14) lib/active_record/querying.rb:38:in `block in find_by_sql'
activerecord (3.2.14) lib/active_record/explain.rb:41:in `logging_query_plan'
activerecord (3.2.14) lib/active_record/querying.rb:37:in `find_by_sql'
newrelic_rpm (3.7.1.188) lib/new_relic/agent/method_tracer.rb:524:in `block in find_by_sql_with_trace_ActiveRecord_self_name_find_by_sql'
newrelic_rpm (3.7.1.188) lib/new_relic/agent/method_tracer.rb:276:in `trace_execution_scoped'
newrelic_rpm (3.7.1.188) lib/new_relic/agent/method_tracer.rb:519:in `find_by_sql_with_trace_ActiveRecord_self_name_find_by_sql'
activerecord (3.2.14) lib/active_record/relation.rb:171:in `exec_queries'
activerecord (3.2.14) lib/active_record/relation.rb:160:in `block in to_a'
activerecord (3.2.14) lib/active_record/explain.rb:41:in `logging_query_plan'
activerecord (3.2.14) lib/active_record/relation.rb:159:in `to_a'
bullet (4.7.1) lib/bullet/active_record3x.rb:10:in `to_a'
activerecord (3.2.14) lib/active_record/relation.rb:198:in `as_json'
activesupport (3.2.14) lib/active_support/json/encoding.rb:47:in `block in encode'
activesupport (3.2.14) lib/active_support/json/encoding.rb:77:in `check_for_circular_references'
activesupport (3.2.14) lib/active_support/json/encoding.rb:46:in `encode'
activesupport (3.2.14) lib/active_support/json/encoding.rb:31:in `encode'
activesupport (3.2.14) lib/active_support/core_ext/object/to_json.rb:16:in `to_json'
app/controllers/products_controller.rb:7:in `search'
actionpack (3.2.14) lib/action_controller/metal/implicit_render.rb:4:in `send_action'
actionpack (3.2.14) lib/abstract_controller/base.rb:167:in `process_action'
actionpack (3.2.14) lib/action_controller/metal/rendering.rb:10:in `process_action'
actionpack (3.2.14) lib/abstract_controller/callbacks.rb:18:in `block in process_action'
activesupport (3.2.14) lib/active_support/callbacks.rb:447:in `_run__70639927732585872__process_action__2788875327411416872__callbacks'
activesupport (3.2.14) lib/active_support/callbacks.rb:405:in `__run_callback'
activesupport (3.2.14) lib/active_support/callbacks.rb:385:in `_run_process_action_callbacks'
activesupport (3.2.14) lib/active_support/callbacks.rb:81:in `run_callbacks'
actionpack (3.2.14) lib/abstract_controller/callbacks.rb:17:in `process_action'
actionpack (3.2.14) lib/action_controller/metal/rescue.rb:29:in `process_action'
actionpack (3.2.14) lib/action_controller/metal/instrumentation.rb:30:in `block in process_action'
activesupport (3.2.14) lib/active_support/notifications.rb:123:in `block in instrument'
activesupport (3.2.14) lib/active_support/notifications/instrumenter.rb:20:in `instrument'
activesupport (3.2.14) lib/active_support/notifications.rb:123:in `instrument'
actionpack (3.2.14) lib/action_controller/metal/instrumentation.rb:29:in `process_action'
actionpack (3.2.14) lib/action_controller/metal/params_wrapper.rb:207:in `process_action'
activerecord (3.2.14) lib/active_record/railties/controller_runtime.rb:18:in `process_action'
newrelic_rpm (3.7.1.188) lib/new_relic/agent/instrumentation/rails3/action_controller.rb:38:in `block in process_action'
newrelic_rpm (3.7.1.188) lib/new_relic/agent/instrumentation/controller_instrumentation.rb:339:in `perform_action_with_newrelic_trace'
newrelic_rpm (3.7.1.188) lib/new_relic/agent/instrumentation/rails3/action_controller.rb:37:in `process_action'
actionpack (3.2.14) lib/abstract_controller/base.rb:121:in `process'
actionpack (3.2.14) lib/abstract_controller/rendering.rb:45:in `process'
actionpack (3.2.14) lib/action_controller/metal.rb:203:in `dispatch'
actionpack (3.2.14) lib/action_controller/metal/rack_delegation.rb:14:in `dispatch'
actionpack (3.2.14) lib/action_controller/metal.rb:246:in `block in action'
actionpack (3.2.14) lib/action_dispatch/routing/route_set.rb:73:in `dispatch'
actionpack (3.2.14) lib/action_dispatch/routing/route_set.rb:36:in `call'
journey (1.0.4) lib/journey/router.rb:68:in `block in call'
journey (1.0.4) lib/journey/router.rb:56:in `call'
actionpack (3.2.14) lib/action_dispatch/routing/route_set.rb:608:in `call'
newrelic_rpm (3.7.1.188) lib/new_relic/rack/error_collector.rb:50:in `call'
newrelic_rpm (3.7.1.188) lib/new_relic/rack/agent_hooks.rb:28:in `call'
newrelic_rpm (3.7.1.188) lib/new_relic/rack/browser_monitoring.rb:23:in `call'
newrelic_rpm (3.7.1.188) lib/new_relic/rack/developer_mode.rb:42:in `call'
meta_request (0.2.8) lib/meta_request/middlewares/app_request_handler.rb:13:in `call'
rack-contrib (1.1.0) lib/rack/contrib/response_headers.rb:17:in `call'
meta_request (0.2.8) lib/meta_request/middlewares/headers.rb:16:in `call'
meta_request (0.2.8) lib/meta_request/middlewares/meta_request_handler.rb:13:in `call'
bullet (4.7.1) lib/bullet/rack.rb:12:in `call'
rack-cors (0.2.9) lib/rack/cors.rb:54:in `call'
oink (0.10.1) lib/oink/middleware.rb:17:in `call'
rack-openid (1.4.2) lib/rack/openid.rb:98:in `call'
rack (1.4.5) lib/rack/deflater.rb:13:in `call'
client_side_validations (3.2.6) lib/client_side_validations/middleware.rb:17:in `call'
warden (1.2.3) lib/warden/manager.rb:35:in `block in call'
warden (1.2.3) lib/warden/manager.rb:34:in `call'
actionpack (3.2.14) lib/action_dispatch/middleware/best_standards_support.rb:17:in `call'
rack (1.4.5) lib/rack/etag.rb:23:in `call'
rack (1.4.5) lib/rack/conditionalget.rb:25:in `call'
actionpack (3.2.14) lib/action_dispatch/middleware/head.rb:14:in `call'
actionpack (3.2.14) lib/action_dispatch/middleware/params_parser.rb:21:in `call'
actionpack (3.2.14) lib/action_dispatch/middleware/flash.rb:242:in `call'
rack (1.4.5) lib/rack/session/abstract/id.rb:210:in `context'
rack (1.4.5) lib/rack/session/abstract/id.rb:205:in `call'
actionpack (3.2.14) lib/action_dispatch/middleware/cookies.rb:341:in `call'
activerecord (3.2.14) lib/active_record/query_cache.rb:64:in `call'
activerecord (3.2.14) lib/active_record/connection_adapters/abstract/connection_pool.rb:479:in `call'
actionpack (3.2.14) lib/action_dispatch/middleware/callbacks.rb:28:in `block in call'
activesupport (3.2.14) lib/active_support/callbacks.rb:405:in `_run__2432337498521717412__call__41636529287313326__callbacks'
activesupport (3.2.14) lib/active_support/callbacks.rb:405:in `__run_callback'
activesupport (3.2.14) lib/active_support/callbacks.rb:385:in `_run_call_callbacks'
activesupport (3.2.14) lib/active_support/callbacks.rb:81:in `run_callbacks'
actionpack (3.2.14) lib/action_dispatch/middleware/callbacks.rb:27:in `call'
rails-dev-tweaks (1.1.0) lib/rails_dev_tweaks/granular_autoload/middleware.rb:34:in `call'
actionpack (3.2.14) lib/action_dispatch/middleware/remote_ip.rb:31:in `call'
better_errors (1.1.0) lib/better_errors/middleware.rb:84:in `protected_app_call'
better_errors (1.1.0) lib/better_errors/middleware.rb:79:in `better_errors_call'
better_errors (1.1.0) lib/better_errors/middleware.rb:56:in `call'
airbrake (3.1.15) lib/airbrake/rails/middleware.rb:13:in `call'
actionpack (3.2.14) lib/action_dispatch/middleware/debug_exceptions.rb:16:in `call'
actionpack (3.2.14) lib/action_dispatch/middleware/show_exceptions.rb:56:in `call'
railties (3.2.14) lib/rails/rack/logger.rb:32:in `call_app'
railties (3.2.14) lib/rails/rack/logger.rb:18:in `call'
quiet_assets (1.0.2) lib/quiet_assets.rb:18:in `call_with_quiet_assets'
actionpack (3.2.14) lib/action_dispatch/middleware/request_id.rb:22:in `call'
rack (1.4.5) lib/rack/methodoverride.rb:21:in `call'
rack (1.4.5) lib/rack/runtime.rb:17:in `call'
activesupport (3.2.14) lib/active_support/cache/strategy/local_cache.rb:72:in `call'
rack (1.4.5) lib/rack/lock.rb:15:in `call'
actionpack (3.2.14) lib/action_dispatch/middleware/static.rb:63:in `call'
airbrake (3.1.15) lib/airbrake/user_informer.rb:16:in `_call'
airbrake (3.1.15) lib/airbrake/user_informer.rb:12:in `call'
railties (3.2.14) lib/rails/engine.rb:484:in `call'
railties (3.2.14) lib/rails/application.rb:231:in `call'
rack (1.4.5) lib/rack/content_length.rb:14:in `call'
railties (3.2.14) lib/rails/rack/log_tailer.rb:17:in `call'
thin (1.6.1) lib/thin/connection.rb:82:in `block in pre_process'
thin (1.6.1) lib/thin/connection.rb:80:in `pre_process'
thin (1.6.1) lib/thin/connection.rb:55:in `process'
thin (1.6.1) lib/thin/connection.rb:41:in `receive_data'
eventmachine (1.0.3) lib/eventmachine.rb:187:in `run'
thin (1.6.1) lib/thin/backends/base.rb:73:in `start'
thin (1.6.1) lib/thin/server.rb:162:in `start'
rack (1.4.5) lib/rack/handler/thin.rb:13:in `run'
rack (1.4.5) lib/rack/server.rb:268:in `start'
railties (3.2.14) lib/rails/commands/server.rb:70:in `start'
railties (3.2.14) lib/rails/commands.rb:55:in `block in <top (required)>'
railties (3.2.14) lib/rails/commands.rb:50:in `<top (required)>'
script/rails:6:in `<main>'
这是我的代码：
def self.text_search(query, account)
uncached do
if query.present?
begin
query = query.split(" ").join(" & ")
if account.use_global_products?
where("to_tsvector('english', style_description) @@ to_tsquery(:q) or to_tsvector('english', style_number) @@ to_tsquery(:q) or to_tsvector('english', brand) @@ to_tsquery(:q)", q: "#{query.strip}:*").where("account_id = ? OR account_id = ?", 0, account.id)
else
where("to_tsvector('english', style_description) @@ to_tsquery(:q) or to_tsvector('english', style_number) @@ to_tsquery(:q) or to_tsvector('english', brand) @@ to_tsquery(:q)", q: "#{query.strip}:*").where("account_id = ?", account.id)
end
rescue Exception => error
puts "inspect it #{error.inspect}"
end
else
scoped
end
end
端
知道ActiveRecord::StatementInvalid为什么还没有拯救？
答案 0 :(得分：2)
修改
这看起来与实际评估查询时有关。您将返回链式查询，但它可能首先在您的控制器中执行，因为您没有使用您的方法返回查询的实际结果。
所以你可以在控制器中rescue，或者你可以继续在你的方法中评估查询，然后返回你想要的对象。
另请注意，在Ruby中拯救Exception并不是一个好主意。看到
Why is it a bad style to `rescue Exception => e` in Ruby?了解更多
您不需要按照您的方式构建它（开始/救援/结束）;你可以拯救整个方法失败：
def self.text_search(query)
uncached do
if query.present?
query = query.split(" ").join(" & ")
where("to_tsvector('english', style_description) @@ to_tsquery(:q) or to_tsvector('english', style_number) @@ to_tsquery(:q) or to_tsvector('english', brand) @@ to_tsquery(:q)", q: "#{query.strip}:*").where("account_id = ? OR account_id = ?", 0, account.id)
else
scoped
end
end
rescue ActiveRecord::StatementInvalid => error
puts "Search Error"
end
答案 1 :(得分：0)
以下是abstract_adapter.rb中的代码（在这里使用rails 4.0.1），它处理日志输出（在日志方法中）
rescue => e
message = "#{e.class.name}: #{e.message}: #{sql}"
@logger.error message if @logger
exception = translate_exception(e, message)
exception.set_backtrace e.backtrace
raise exception
end
看起来只要@logger处于活动状态，activerecord就会始终将此报告给日志文件。
我希望有一种方法可以在外部救援时避免这种行为，所以任何想法都会受到欢迎。
答案 2 :(得分：0)
在我的一个项目中，我遇到了类似的问题。感谢@Tyler的回答，我得以rescue出错。
我正在使用Rails 5.2.3。在我的数据库中，有一个表，电影，其中有一列称为标题。
（请原谅使用eval，我知道您使用它是不好的做法。）
begin
result = eval("Movie.where(name: \"test\")")
p result # this actually triggers the SQL error
rescue ActiveRecord::StatementInvalid => error_variable
p "We got 'em"
result = error_variable.to_s
end
因此，简而言之，您不能只在begin块中运行查询，您 也需要对其进行评估。这可以通过查询结果的简单p语句来完成。