I am getting the following error frequently in my application. If I restart my rails application this error will not appear for some time.
Rails - 3.1.3
Ruby - 1.9.3
ActiveRecord::StatementInvalid: PG::Error: ERROR: null value in column "id" violates not-null constraint
Directory.create(:name=>"name",:alias_name=>"name",:site_id=>2,:type=>"Directory") (0.3ms) BEGIN SQL (0.8ms) INSERT INTO "databases" ("alias_name", "created_at", "created_by", "id", "name", "site_id", "type", "updated_at", "updated_by") VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9) [["alias_name", "name"], ["created_at", Wed, 17 Apr 2013 16:46:25 IST +05:30], ["created_by", nil], ["id", nil], ["name", "name"], ["site_id", 2], ["type", "Directory"], ["updated_at", Wed, 17 Apr 2013 16:46:25 IST +05:30], ["updated_by", nil]] PG::Error: ERROR: null value in column "id" violates not-null constraint : INSERT INTO "databases" ("alias_name", "created_at", "created_by", "id", "name", "site_id", "type", "updated_at", "updated_by") VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9) (0.2ms) ROLLBACK ActiveRecord::StatementInvalid: PG::Error: ERROR: null value in column "id" violates not-null constraint : INSERT INTO "databases" ("alias_name", "created_at", "created_by", "id", "name", "site_id", "type", "updated_at", "updated_by") VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9) from /home/user/.rvm/gems/ruby-1.9.3-p194-firstversion@web/gems/activerecord-3.1.3/lib/active_record/connection_adapters/postgresql_adapter.rb:1034:in `get_last_result' from /home/user/.rvm/gems/ruby-1.9.3-p194-firstversion@web/gems/activerecord-3.1.3/lib/active_record/connection_adapters/postgresql_adapter.rb:1034:in `exec_cache' from /home/user/.rvm/gems/ruby-1.9.3-p194-firstversion@web/gems/activerecord-3.1.3/lib/active_record/connection_adapters/postgresql_adapter.rb:603:in `block in exec_query' from /home/user/.rvm/gems/ruby-1.9.3-p194-firstversion@web/gems/activerecord-3.1.3/lib/active_record/connection_adapters/abstract_adapter.rb:244:in `block in log' from /home/user/.rvm/gems/ruby-1.9.3-p194-firstversion@web/gems/activesupport-3.1.3/lib/active_support/notifications/instrumenter.rb:21:in `instrument' from /home/user/.rvm/gems/ruby-1.9.3-p194-firstversion@web/gems/activerecord-3.1.3/lib/active_record/connection_adapters/abstract_adapter.rb:239:in `log' from /home/user/.rvm/gems/ruby-1.9.3-p194-firstversion@web/gems/activerecord-3.1.3/lib/active_record/connection_adapters/postgresql_adapter.rb:601:in `exec_query' from /home/user/.rvm/gems/ruby-1.9.3-p194-firstversion@web/gems/activerecord-3.1.3/lib/active_record/connection_adapters/abstract/database_statements.rb:63:in `exec_insert' from /home/user/.rvm/gems/ruby-1.9.3-p194-firstversion@web/gems/activerecord-3.1.3/lib/active_record/connection_adapters/abstract/database_statements.rb:90:in `insert' from /home/user/.rvm/gems/ruby-1.9.3-p194-firstversion@web/gems/activerecord-3.1.3/lib/active_record/connection_adapters/abstract/query_cache.rb:14:in `insert' from /home/user/.rvm/gems/ruby-1.9.3-p194-firstversion@web/gems/activerecord-3.1.3/lib/active_record/relation.rb:70:in `insert' from /home/user/.rvm/gems/ruby-1.9.3-p194-firstversion@web/gems/activerecord-3.1.3/lib/active_record/persistence.rb:313:in `create' from /home/user/.rvm/gems/ruby-1.9.3-p194-firstversion@web/gems/activerecord-3.1.3/lib/active_record/timestamp.rb:51:in `create' from /home/user/.rvm/gems/ruby-1.9.3-p194-firstversion@web/gems/activerecord-3.1.3/lib/active_record/callbacks.rb:268:in `block in create' from /home/user/.rvm/gems/ruby-1.9.3-p194-firstversion@web/gems/activesupport-3.1.3/lib/active_support/callbacks.rb:390:in `_run_create_callbacks' from /home/user/.rvm/gems/ruby-1.9.3-p194-firstversion@web/gems/activesupport-3.1.3/lib/active_support/callbacks.rb:81:in `run_callbacks' ... 7 levels... from /home/user/.rvm/gems/ruby-1.9.3-p194-firstversion@web/gems/activerecord-3.1.3/lib/active_record/validations.rb:50:in `save' from /home/user/.rvm/gems/ruby-1.9.3-p194-firstversion@web/gems/activerecord-3.1.3/lib/active_record/attribute_methods/dirty.rb:22:in `save' from /home/user/.rvm/gems/ruby-1.9.3-p194-firstversion@web/gems/activerecord-3.1.3/lib/active_record/transactions.rb:241:in `block (2 levels) in save' from /home/user/.rvm/gems/ruby-1.9.3-p194-firstversion@web/gems/activerecord-3.1.3/lib/active_record/transactions.rb:295:in `block in with_transaction_returning_status' from /home/user/.rvm/gems/ruby-1.9.3-p194-firstversion@web/gems/activerecord-3.1.3/lib/active_record/connection_adapters/abstract/database_statements.rb:192:in `transaction' from /home/user/.rvm/gems/ruby-1.9.3-p194-firstversion@web/gems/activerecord-3.1.3/lib/active_record/transactions.rb:208:in `transaction' from /home/user/.rvm/gems/ruby-1.9.3-p194-firstversion@web/gems/activerecord-3.1.3/lib/active_record/transactions.rb:293:in `with_transaction_returning_status' from /home/user/.rvm/gems/ruby-1.9.3-p194-firstversion@web/gems/activerecord-3.1.3/lib/active_record/transactions.rb:241:in `block in save' from /home/user/.rvm/gems/ruby-1.9.3-p194-firstversion@web/gems/activerecord-3.1.3/lib/active_record/transactions.rb:252:in `rollback_active_record_state!' from /home/user/.rvm/gems/ruby-1.9.3-p194-firstversion@web/gems/activerecord-3.1.3/lib/active_record/transactions.rb:240:in `save' from (irb):9 from /home/user/.rvm/gems/ruby-1.9.3-p194-firstversion@web/gems/railties-3.1.3/lib/rails/commands/console.rb:45:in `start' from /home/user/.rvm/gems/ruby-1.9.3-p194-firstversion@web/gems/railties-3.1.3/lib/rails/commands/console.rb:8:in `start' from /home/user/.rvm/gems/ruby-1.9.3-p194-firstversion@web/gems/railties-3.1.3/lib/rails/commands.rb:40:in `<top (required)>' from script/rails:6:in `require' from script/rails:6:in `<main>'1.9.3p194 :010 > I don't know why id is going as nil in the rails generated SQL.
Can anyone help me please !!! I am struggling lot with this error
Thanks in Advance,
Selva Chezhian