我在我的数据库上有多个字段的唯一索引。如果您尝试在重复记录上调用save,它将引发ActiveRecord :: StatementInvalid并显示mysql错误。是否有一种方法可以在Rails内处理此问题,无论是通过创建唯一约束条件还是以其他方式在出现此情况时返回相关错误消息?
这是跟踪信息:
这是跟踪信息:
ActiveRecord::StatementInvalid: Mysql::Error: Duplicate entry '2010-12-09-2-0-1-1' for key 2: INSERT INTO `entries` (`rejected_at`, `created_at`, `comments`, `overtime`, `submitted_at`, `updated_at`, `time`, `approved`, `day`, `user_id`, `approved_at`, `job_id`, `submitted`, `rejected`) VALUES(NULL, '2010-12-09 21:50:46', NULL, 0, NULL, '2010-12-09 21:50:46', 2.0, NULL, '2010-12-09', 1, NULL, 1, NULL, NULL)
from /home/cmatthews/src/cannon/vendor/rails/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb:219:in `log'
from /home/cmatthews/src/cannon/vendor/rails/activerecord/lib/active_record/connection_adapters/mysql_adapter.rb:319:in `execute'
from /home/cmatthews/src/cannon/vendor/rails/activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb:259:in `insert_sql'
from /home/cmatthews/src/cannon/vendor/rails/activerecord/lib/active_record/connection_adapters/mysql_adapter.rb:329:in `insert_sql'
from /home/cmatthews/src/cannon/vendor/rails/activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb:44:in `insert_without_query_dirty'
from /home/cmatthews/src/cannon/vendor/rails/activerecord/lib/active_record/connection_adapters/abstract/query_cache.rb:18:in `insert'
from /home/cmatthews/src/cannon/vendor/rails/activerecord/lib/active_record/base.rb:2901:in `create_without_timestamps'
from /home/cmatthews/src/cannon/vendor/rails/activerecord/lib/active_record/timestamp.rb:53:in `create_without_callbacks'
from /home/cmatthews/src/cannon/vendor/rails/activerecord/lib/active_record/callbacks.rb:266:in `create'
from /home/cmatthews/src/cannon/vendor/rails/activerecord/lib/active_record/base.rb:2867:in `create_or_update_without_callbacks'
from /home/cmatthews/src/cannon/vendor/rails/activerecord/lib/active_record/callbacks.rb:250:in `create_or_update'
from /home/cmatthews/src/cannon/vendor/rails/activerecord/lib/active_record/base.rb:2538:in `save_without_validation'
from /home/cmatthews/src/cannon/vendor/rails/activerecord/lib/active_record/validations.rb:1078:in `save_without_dirty'
from /home/cmatthews/src/cannon/vendor/rails/activerecord/lib/active_record/dirty.rb:79:in `save_without_transactions'
from /home/cmatthews/src/cannon/vendor/rails/activerecord/lib/active_record/transactions.rb:229:in `send'
from /home/cmatthews/src/cannon/vendor/rails/activerecord/lib/active_record/transactions.rb:229:in `with_transaction_returning_status'
from /home/cmatthews/src/cannon/vendor/rails/activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb:136:in `transaction'
from /home/cmatthews/src/cannon/vendor/rails/activerecord/lib/active_record/transactions.rb:182:in `transaction'
from /home/cmatthews/src/cannon/vendor/rails/activerecord/lib/active_record/transactions.rb:228:in `with_transaction_returning_status'
from /home/cmatthews/src/cannon/vendor/rails/activerecord/lib/active_record/transactions.rb:196:in `save'
from /home/cmatthews/src/cannon/vendor/rails/activerecord/lib/active_record/transactions.rb:208:in `rollback_active_record_state!'
from /home/cmatthews/src/cannon/vendor/rails/activerecord/lib/active_record/transactions.rb:196:in `save'