Rails 3.2 Postgres保存错误“ActiveRecord :: StatementInvalid：PG ::错误：错误：位置5’T’附近的语法错误”

当我尝试将特定类保存到数据库时，我的应用程序已经开始抛出错误。 我不确定是什么导致这种情况开始发生 – 过去几天我一直有各种各样的数据库问题….

在任何情况下，我的模型似乎工作正常（它正确计算所有before_save值），但然后它尝试保存到数据库并爆炸。

SQL (0.8ms) INSERT INTO "portfolios" ("correlation_matrix", "created_at", "data", "mean_return", "std_dev", "updated_at", "weights") VALUES ($1, $2, $3, $4, $5, $6, $7) RETURNING "id" [["correlation_matrix", "--- \n- - 1.0\n - -0.4873114574375062\n- - -0.4873114574375062\n - 1.0\n"], ["created_at", Sat, 16 Jun 2012 15:12:35 MDT -06:00], ["data", {"TSX"=>0.5, "VUSTX"=>0.5}], ["mean_return", #], ["std_dev", #], ["updated_at", Sat, 16 Jun 2012 15:12:35 MDT -06:00], ["weights", "--- \nTSX: 0.5\nVUSTX: 0.5\n"]] 

引发此错误：

 ActiveRecord::StatementInvalid: PG::Error: ERROR: Syntax error near 'T' at position 5 

我不知道这个错误意味着什么（或者这个’T’是什么……），甚至在哪里开始排除故障……任何帮助都将不胜感激。

我可以发布任何可能需要的信息来解决这个问题….

相关迁移：

  create_table :portfolios do |t| t.text :weights t.decimal :mean_return, :precision => 15, :scale => 10 t.decimal :std_dev, :precision => 15, :scale => 10 t.text :correlation_matrix t.hstore :data t.timestamps end execute "CREATE INDEX portfolios_gin_data_hstore ON portfolios USING GIN(data);" 

完整堆栈跟踪：

  ActiveRecord::StatementInvalid: PG::Error: ERROR: Syntax error near 'T' at position 5 : INSERT INTO "portfolios" ("correlation_matrix", "created_at", "data", "mean_return", "std_dev", "updated_at", "weights") VALUES ($1, $2, $3, $4, $5, $6, $7) RETURNING "id" from /Users/brandon/.rvm/gems/ruby-1.9.3-p194@myapp/gems/activerecord-3.2. 6/lib/active_record/connection_adapters/postgresql_adapter.rb:1164:in `get_last_result' from /Users/brandon/.rvm/gems/ruby-1.9.3-p194@myapp/gems/activerecord-3.2. 6/lib/active_record/connection_adapters/postgresql_adapter.rb:1164:in `exec_cache' from /Users/brandon/.rvm/gems/ruby-1.9.3-p194@myapp/gems/activerecord-3.2. 6/lib/active_record/connection_adapters/postgresql_adapter.rb:665:in `block in exec_query' from /Users/brandon/.rvm/gems/ruby-1.9.3-p194@myapp/gems/activerecord-3.2. 6/lib/active_record/connection_adapters/abstract_adapter.rb:280:in `block in log' from /Users/brandon/.rvm/gems/ruby-1.9.3-p194@myapp/gems/activesupport-3.2.6/lib/active_support/notifications/instrumenter. rb:20:in `instrument' from /Users/brandon/.rvm/gems/ruby-1.9.3-p194@myapp/gems/activerecord-3.2. 6/lib/active_record/connection_adapters/abstract_adapter.rb:275:in `log' from /Users/brandon/.rvm/gems/ruby-1.9.3-p194@myapp/gems/activerecord-3.2. 6/lib/active_record/connection_adapters/postgresql_adapter.rb:663:in `exec_query' from /Users/brandon/.rvm/gems/ruby-1.9.3-p194@myapp/gems/activerecord-3.2. 6/lib/active_record/connection_adapters/abstract/database_statements.rb:63:in `exec_insert' from /Users/brandon/.rvm/gems/ruby-1.9.3-p194@myapp/gems/activerecord-3.2. 6/lib/active_record/connection_adapters/abstract/database_statements.rb:90:in `insert' from /Users/brandon/.rvm/gems/ruby-1.9.3-p194@myapp/gems/activerecord-3.2. 6/lib/active_record/connection_adapters/abstract/query_cache.rb:14:in `insert' from /Users/brandon/.rvm/gems/ruby-1.9.3-p194@myapp/gems/activerecord-3.2.6/lib/active_record/relation.rb:66:in `insert' from /Users/brandon/.rvm/gems/ruby-1.9.3-p194@myapp/gems/activerecord-3.2.6/lib/active_record/persistence.rb:363:in `create' from /Users/brandon/.rvm/gems/ruby-1.9.3-p194@myapp/gems/activerecord-3.2.6/lib/active_record/timestamp.rb:57:in `create' from /Users/brandon/.rvm/gems/ruby-1.9.3-p194@myapp/gems/activerecord-3.2.6/lib/active_record/callbacks.rb:268:in `block in create' from /Users/brandon/.rvm/gems/ruby-1.9.3-p194@myapp/gems/activesupport-3.2.6/lib/active_support/callbacks.rb:403:in `_run__772785567275930853__create__1186465801021498362__callbacks' from /Users/brandon/.rvm/gems/ruby-1.9.3-p194@myapp/gems/activesupport-3.2.6/lib/active_support/callbacks.rb:405:in `__run_callback' ... 11 levels... from /Users/brandon/.rvm/gems/ruby-1.9.3-p194@myapp/gems/activerecord-3.2.6/lib/active_record/validations.rb:50:in `save' from /Users/brandon/.rvm/gems/ruby-1.9.3-p194@myapp/gems/activerecord-3.2.6/lib/active_record/attribute_methods/dirty.rb:22:in `save' from /Users/brandon/.rvm/gems/ruby-1.9.3-p194@myapp/gems/activerecord-3.2.6/lib/active_record/transactions.rb:241:in `block (2 levels) in save' from /Users/brandon/.rvm/gems/ruby-1.9.3-p194@myapp/gems/activerecord-3.2.6/lib/active_record/transactions.rb:295:in `block in with_transaction_returning_status' from /Users/brandon/.rvm/gems/ruby-1.9.3-p194@myapp/gems/activerecord-3.2. 6/lib/active_record/connection_adapters/abstract/database_statements.rb:192:in `transaction' from /Users/brandon/.rvm/gems/ruby-1.9.3-p194@myapp/gems/activerecord-3.2.6/lib/active_record/transactions.rb:208:in `transaction' from /Users/brandon/.rvm/gems/ruby-1.9.3-p194@myapp/gems/activerecord-3.2.6/lib/active_record/transactions.rb:293:in `with_transaction_returning_status' from /Users/brandon/.rvm/gems/ruby-1.9.3-p194@myapp/gems/activerecord-3.2.6/lib/active_record/transactions.rb:241:in `block in save' from /Users/brandon/.rvm/gems/ruby-1.9.3-p194@myapp/gems/activerecord-3.2.6/lib/active_record/transactions.rb:252:in `rollback_active_record_state!' from /Users/brandon/.rvm/gems/ruby-1.9.3-p194@myapp/gems/activerecord-3.2.6/lib/active_record/transactions.rb:240:in `save' from (irb):33 from /Users/brandon/.rvm/gems/ruby-1.9.3-p194@myapp/gems/railties-3.2.6/lib/rails/commands/console.rb:47:in `start' from /Users/brandon/.rvm/gems/ruby-1.9.3-p194@myapp/gems/railties-3.2.6/lib/rails/commands/console.rb:8:in `start' from /Users/brandon/.rvm/gems/ruby-1.9.3-p194@myapp/gems/railties-3.2.6/lib/rails/commands.rb:41:in `' from script/rails:6:in `require' from script/rails:6:in `' 

更新1根据要求提供一些型号代码。

宏观的东西：

 attr_accessible :weights serialize :correlation_matrix serialize :weights has_and_belongs_to_many :securities, :uniq => true has_and_belongs_to_many :efficient_frontiers before_validation :format_weights_tickers, :add_securities, :validate_weights, :set_weights_in_hstore, :build_correlation_matrix, :set_mean_return, :set_standard_deviation validates_presence_of :mean_return, :std_dev, :securities, :correlation_matrix, :weights validates_numericality_of :mean_return, :std_dev validate :uniqueness_of_weights before_destroy :check_for_dependent scope :by_std_dev, :order => 'std_dev ASC' 

我能用HStore专栏找到的任何东西都可以用来搜索特定的代码。 这曾经工作……我不知道改变了什么。 我可能已经升级了Postgres（我正在摆弄自制软件）或者可能会因为rails而改变。 我确实尝试回到3.2.3，但我得到了同样的错误。

 def self.find_by_hstore(search_key, search_value) where("data @> (:key => :value)", :key => search_key.to_s, :value => search_value.to_s) end def set_weights_in_hstore self.data = {} if self.data.nil? weights.each_pair {|ticker, weight| self.data[ticker.to_s] = weight} end 

如果这个太脱节，我可以发布整个模型。 让我知道！

更新＃2 – 我在其他地方也遇到类似的错误….

简单的用户注册后….

 SQL (10.9ms) INSERT INTO "users" ("admin", "confirmation_sent_at", "confirmation_token", "confirmed_at", "created_at", "current_sign_in_at", "current_sign_in_ip", "data", "email", "encrypted_password", "last_email_at", "last_sign_in_at", "last_sign_in_ip", "name", "plan", "remember_created_at", "reset_password_sent_at", "reset_password_token", "selected_portfolio_id", "sign_in_count", "unconfirmed_email", "updated_at", "verified") VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12, $13, $14, $15, $16, $17, $18, $19, $20, $21, $22, $23) RETURNING "id" [["admin", false], ["confirmation_sent_at", Sat, 16 Jun 2012 20:37:07 MDT -06:00], ["confirmation_token", "7Xu15pMrV9zTNmofv8bD"], ["confirmed_at", nil], ["created_at", Sat, 16 Jun 2012 20:37:07 MDT -06:00], ["current_sign_in_at", nil], ["current_sign_in_ip", nil], ["data", {"min_rebalance_spacing"=>90 days, "max_contact_frequency"=>7 days, "allowable_drift"=>5}], ["email", "[e-mail]"], ["encrypted_password", "$2a$10$HNUmlYmcVXbBsyZRFCAB7e8c5mf6S9UOdWr/ZCz10y5Sg4gOh8Zvq"], ["last_email_at", Sat, 16 Jun 2012 20:37:07 MDT -06:00], ["last_sign_in_at", nil], ["last_sign_in_ip", nil], ["name", "Joe Blow"], ["plan", "basic"], ["remember_created_at", nil], ["reset_password_sent_at", nil], ["reset_password_token", nil], ["selected_portfolio_id", nil], ["sign_in_count", 0], ["unconfirmed_email", nil], ["updated_at", Sat, 16 Jun 2012 20:37:07 MDT -06:00], ["verified", false]] 20:37:07 log.1 | [ef4a7d55fb30e8fb82ac6c860e674bfc] [127.0.0.1] PG::Error: ERROR: Syntax error near 'm' at position 5 20:37:07 log.1 | : INSERT INTO "users" ("admin", "confirmation_sent_at", "confirmation_token", "confirmed_at", "created_at", "current_sign_in_at", "current_sign_in_ip", "data", "email", "encrypted_password", "last_email_at", "last_sign_in_at", "last_sign_in_ip", "name", "plan", "remember_created_at", "reset_password_sent_at", "reset_password_token", "selected_portfolio_id", "sign_in_count", "unconfirmed_email", "updated_at", "verified") VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12, $13, $14, $15, $16, $17, $18, $19, $20, $21, $22, $23) RETURNING "id" 

UDPATE 3

我的数据库/用户表似乎有些奇怪。 在迁移中加载环境时出现以下错误：

 rake aborted! PG::Error: ERROR: relation "users" does not exist LINE 4: WHERE a.attrelid = '"users"'::regclass ^ : SELECT a.attname, format_type(a.atttypid, a.atttypmod), d.adsrc, a.attnotnull FROM pg_attribute a LEFT JOIN pg_attrdef d ON a.attrelid = d.adrelid AND a.attnum = d.adnum WHERE a.attrelid = '"users"'::regclass AND a.attnum > 0 AND NOT a.attisdropped ORDER BY a.attnum 

Answer 1

我在Rails 3.2上遇到了类似的问题。 如果你没有使用Rails trunk（朝着4.0工作），它本身并不理解hstore – 你需要定义一个序列化编码器（由activerecord-postgres-hstore gem提供），如下所示：

 class Example < ActiveRecord::Base serialize :data, ActiveRecord::Coders::Hstore end