Exceptions used with SQLAlchemy.
The base exception class is SQLAlchemyError. Exceptions which are raised as a result of DBAPI exceptions are all subclasses of DBAPIError.
Raised when an invalid or conflicting function argument is supplied.
This error generally corresponds to construction time state errors.
Raised by topological sorts when a circular dependency is detected
Raised when an error occurs during SQL compilation
Rows have been modified outside of the unit of work.
Raised when the execution of a database operation fails.
DBAPIError wraps exceptions raised by the DB-API underlying the database operation. Driver-specific implementations of the standard DB-API exception types are wrapped by matching sub-types of SQLAlchemy's DBAPIError when possible. DB-API's Error type maps to DBAPIError in SQLAlchemy, otherwise the names are identical. Note that there is no guarantee that different DB-API implementations will raise the same exception type for any given error condition.
If the error-raising operation occured in the execution of a SQL statement, that statement and its parameters will be available on the exception object in the statement and params attributes.
The wrapped exception object is available in the orig attribute. Its type and properties are DB-API implementation specific.
Construct a new DBAPIError.
A disconnect is detected on a raw DB-API connection.
This error is raised and consumed internally by a connection pool. It can be raised by a PoolListener so that the host pool forces a disconnect.
A invalid condition was detected during flush().
SQLAlchemy was asked to do something it can't do.
This error generally corresponds to runtime state errors.
Raised by ForeignKey when the referred Table cannot be located.
A nonexistent column is requested from a RowProxy.
Table does not exist or is not visible to a connection.
Issued once per usage of a deprecated API.
Issued once per usage of a deprecated API.
Raised when a connection pool times out on getting a connection.
SQL was attempted without a database connection to execute it on.