Errors#

The storages raise the following SCIMException, which scim2-server turns into error responses:

Exception	Raised when
`NotFoundException`	The resource does not exist, or its identifier cannot have the type of the key column.
`PreconditionFailedException`	The stored version differs from `expected_version`, or another transaction changed the record before the write.
`UniquenessException`	Another resource holds a unique value of the resource, such as its `userName`.
`InvalidValueException`	The resource holds a value no mapping stores, an entry of a `Link` without `value`, a link to an unknown resource, or a `type` other than the one of its `Link`.
`MutabilityException`	The resource changes an attribute the mapping only reads, or removes a value whose column cannot be `NULL`.
`InvalidFilterException`	The filter compares an attribute the mapping does not store, or a write-only attribute.
`InvalidPathException`	The search sorts on an attribute the mapping does not store, or on a `Link`.

An integrity error of the database other than a unique value already taken goes through as a sqlalchemy.exc.IntegrityError.