## wiring.get_error_rows()


Return the rows that failed an `"error"` rule, as a writer receives them, with one rule column per rule.


Usage

``` python
wiring.get_error_rows(
    schema,
    failure,
)
```


## Parameters


`schema: type[dy.Schema]`  
The schema the rows were validated against, which sets each rule's severity.

`failure: dy.FailureInfo`  
What `Schema.filter` returned beside the valid rows.


## Returns


`pl.DataFrame`  
The original columns in their own order, then a `String` rule column for every rule, named by [get_check_name_for_rule](wiring.get_check_name_for_rule.md#dagster_dataframely.wiring.get_check_name_for_rule). A rule column's value is `valid`, `invalid` or `unknown`.


## Raises


`ReservedColumnError`  
A column name is in the reserved `dy_` namespace.

`InvalidColumnNameError`  
A column name has a character Dagster does not allow in an asset check name.

`CheckNameCollisionError`  
Two rules produce the same asset check name.

`InvalidSeverityError`  
The schema declares a severity this package cannot read.


## Examples


``` python
import dagster_dataframely as dd
from dagster_dataframely.data import OrdersSchema, marketplace_orders

_, failure = OrdersSchema.filter(marketplace_orders, cast=False)
error_rows = dd.wiring.get_error_rows(OrdersSchema, failure)
error_rows.select("order_id", "amount", "dy_rule__amount__min")
```


shape: (8, 3)

| order_id   | amount          | dy_rule\_\_amount\_\_min |
|------------|-----------------|--------------------------|
| str        | decimal\[10,2\] | str                      |
| "ORD-0011" | -4.00           | "invalid"                |
| "ORD-0012" | 22.00           | "valid"                  |
| "ORD-0013" | 60.00           | "valid"                  |
| "ORD-9"    | 31.00           | "valid"                  |
| "ORD-0014" | 77.00           | "valid"                  |
| "ORD-0015" | -1.00           | "invalid"                |
| "ORD-0016" | 14.00           | "valid"                  |
| "ORD-0016" | 16.00           | "valid"                  |