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| Developed by | Guardrails AI |
| Date of development | Feb 15, 2024 |
| Validator type | Text2SQL |
| Blog | |
| License | Apache 2 |
| Input/Output | Output |
This validator confirms that all SQL predicates generated by the LLM are valid and allowed.
$ guardrails hub install hub://guardrails/exclude_sql_predicates
In this example, we apply the validator to a string output generated by an LLM.
# Import Guard and Validator
from guardrails import Guard
from guardrails.hub import ExcludeSqlPredicates
# Setup Guard
guard = Guard().use(
ExcludeSqlPredicates, predicates=["Drop"], on_fail="exception"
)
response = guard.validate("select * from employees;") # Validator passes
try:
response = guard.validate("drop table departments;") # Validator fails
except Exception as e:
print(e)
Output:
Validation failed for field with errors: SQL query contains predicate Drop
__init__(self, on_fail="noop")
Initializes a new instance of the Validator class.
Parameters
predicates (list[str]): The list of SQL predicates to avoid.on_fail (str, Callable): The policy to enact when a validator fails. If str, must be one of reask, fix, filter, refrain, noop, exception or fix_reask. Otherwise, must be a function that is called when the validator fails.__call__(self, value, metadata={}) -> ValidationResult
Validates the given value using the rules defined in this validator, relying on the metadata provided to customize the validation process. This method is automatically invoked by guard.parse(...), ensuring the validation logic is applied to the input data.
Note:
guard.parse(...) where this method will be called internally for each associated Validator.guard.parse(...), ensure to pass the appropriate metadata dictionary that includes keys and values required by this validator. If guard is associated with multiple validators, combine all necessary metadata into a single dictionary.Parameters
value (Any): The input value to validate.metadata (dict): A dictionary containing metadata required for validation. No additional metadata keys are needed for this validator.The validator playground is available to authenticated users. Please log in to use it.