How to get all rows with initial values after the assertion in dataform?

Question

I'm doing transformation with dataform , I added some assertions in my transformation

example of table input (all types of columns are STRING):

     id | valueu1 | value2             | value3
     1  |1?2      | 01/01/1900 00:00:00|x1
     2  |1.2      | 01-01-1900 00:00:00|x2

example of stg transformation:

    config {
         type: "table",
         database: "dev",
         schema: "schema1",
         tags: ["staging", "daily"],

         /* DESCRIPTION */
         description:"some description",
         columns: {
           id: "description",
           value1: "description",
           value2: "description",
           value3: "description" }
         ,
         assertions: {
         uniqueKey: ["id"],
         nonNull: ["valueu1","value2"]
         }

         }
         select
         id,
         safe_cast(
         REGEXP_REPLACE(
         value1,
          ",",
          "."
         ) as numeric
         ) value1,
         SAFE.PARSE_DATETIME('%d/%m/%Y %H:%M:%S', value2) value2,
         value3
         from
           ${ref('input')}

The problem here is when the assertion is failed beacause of column value1 or value2 of table input when I want to know the raw value from the view in assertionSchema I can't beacause in the view the value is null (the result of safe_cast). How to get the raw value of column failed in the assertion, I know that I can get this value from input table, but I want to the value in the view of assertionSchema.

Thanks