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feat: declarative input validation with opt-in runtime enforcement

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- Add `minLength`/`maxLength` to `IO.String.Input`, mirroring existing `min`/`max` for `Int`/`Float`.
- Add `runtime_input_validation` to V3 `Schema` (and `RUNTIME_INPUT_VALIDATION` class attribute for V1 nodes). Default `False`

Signed-off-by: bigcat88 <bigcat88@icloud.com>
This commit is contained in:
bigcat88
2026-02-20 16:07:09 +02:00
parent 3d870ff51f
commit 9a98cdc389
4 changed files with 334 additions and 5 deletions
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23
comfy_api/latest/_io.py
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@@ -327,11 +327,14 @@ class String(ComfyTypeIO):
'''String input.'''
def __init__(self, id: str, display_name: str=None, optional=False, tooltip: str=None, lazy: bool=None,
multiline=False, placeholder: str=None, default: str=None, dynamic_prompts: bool=None,
socketless: bool=None, force_input: bool=None, extra_dict=None, raw_link: bool=None, advanced: bool=None):
socketless: bool=None, force_input: bool=None, extra_dict=None, raw_link: bool=None, advanced: bool=None,
min_length: int=None, max_length: int=None):
super().__init__(id, display_name, optional, tooltip, lazy, default, socketless, None, force_input, extra_dict, raw_link, advanced)
self.multiline = multiline
self.placeholder = placeholder
self.dynamic_prompts = dynamic_prompts
self.min_length = min_length
self.max_length = max_length
self.default: str
def as_dict(self):
@@ -339,6 +342,8 @@ class String(ComfyTypeIO):
"multiline": self.multiline,
"placeholder": self.placeholder,
"dynamicPrompts": self.dynamic_prompts,
"minLength": self.min_length,
"maxLength": self.max_length,
})
@comfytype(io_type="COMBO")
@@ -1551,6 +1556,12 @@ class Schema:
Use this for nodes with interactive/operable UI regions that produce intermediate outputs
(e.g., Image Crop, Painter) rather than final outputs (e.g., Save Image).
"""
runtime_input_validation: bool = False
"""Opt this node into runtime validation of declared input bounds (STRING minLength/maxLength,
INT/FLOAT min/max, COMBO membership) against resolved values, including values that arrive via links.
When False, only direct widget values are validated pre-execution and linked values flow through unchecked.
"""
def validate(self):
'''Validate the schema:
@@ -2006,6 +2017,14 @@ class _ComfyNodeBaseInternal(_ComfyNodeInternal):
cls.GET_SCHEMA()
return cls._ACCEPT_ALL_INPUTS
_RUNTIME_INPUT_VALIDATION = None
@final
@classproperty
def RUNTIME_INPUT_VALIDATION(cls): # noqa
if cls._RUNTIME_INPUT_VALIDATION is None:
cls.GET_SCHEMA()
return cls._RUNTIME_INPUT_VALIDATION
@final
@classmethod
def INPUT_TYPES(cls) -> dict[str, dict]:
@@ -2050,6 +2069,8 @@ class _ComfyNodeBaseInternal(_ComfyNodeInternal):
cls._NOT_IDEMPOTENT = schema.not_idempotent
if cls._ACCEPT_ALL_INPUTS is None:
cls._ACCEPT_ALL_INPUTS = schema.accept_all_inputs
if cls._RUNTIME_INPUT_VALIDATION is None:
cls._RUNTIME_INPUT_VALIDATION = schema.runtime_input_validation
if cls._RETURN_TYPES is None:
output = []