feat: plantilla base workspace SaaS
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"""
Manejadores globales de excepciones para FastAPI
"""
import logging
from typing import Any, Dict
from fastapi import Request, status, HTTPException
from fastapi.responses import JSONResponse
from fastapi.encoders import jsonable_encoder
from fastapi.encoders import jsonable_encoder
from fastapi.exceptions import RequestValidationError
from pydantic import ValidationError
from sqlalchemy.exc import IntegrityError, SQLAlchemyError
from .config import settings
from .exceptions import BaseAPIException
logger = logging.getLogger(__name__)
def _cors_headers(request: Request) -> Dict[str, str]:
"""CORS headers for error responses so browser does not block on 4xx/5xx."""
origin = request.headers.get("origin")
if not origin or origin not in settings.cors_origins_list:
return {}
return {
"Access-Control-Allow-Origin": origin,
"Access-Control-Allow-Credentials": "true",
}
async def base_exception_handler(
request: Request,
exc: BaseAPIException,
) -> JSONResponse:
"""
Manejador para todas las excepciones personalizadas de la API
"""
logger.warning(
f"API Exception: {exc.error_code} - {exc.message}",
extra={
"path": request.url.path,
"method": request.method,
"status_code": exc.status_code,
},
)
# Log detailed errors if they exist
if hasattr(exc, "errors") and exc.errors:
logger.warning(f"Validation errors details: {exc.errors}")
response = JSONResponse(
status_code=exc.status_code,
content=jsonable_encoder(exc.to_dict()),
)
for k, v in _cors_headers(request).items():
response.headers[k] = v
return response
# Mapa de campos técnicos a nombres legibles en español
_FIELD_LABELS: Dict[str, str] = {
"broker_key": "Clave del Agente",
"license": "Patente",
"tax_id": "RFC",
"personal_id": "CURP",
"email": "Correo Electrónico",
"phone": "Teléfono",
"fax": "Fax",
"contact": "Nombre de Contacto",
"name": "Nombre / Razón Social",
"address": "Dirección",
"postal_code": "Código Postal",
"city": "Ciudad",
"state": "Estado",
"country": "País",
# Partes (A76)
"unit_cost": "Costo Unitario",
"unit_weight": "Peso Unitario",
"sector": "Sector",
"fraction_type": "Tipo de tarifa",
}
_FIELD_PATTERN_MESSAGES: Dict[str, str] = {
"broker_key": "La Clave del Agente solo puede contener letras y números (máx. 5 caracteres).",
"license": "La Patente debe ser un número entre 1 y 9999 (no puede ser 0 ni contener letras).",
"tax_id": "El RFC no tiene el formato correcto. Ejemplo válido: XAXX010101000.",
"personal_id": "La CURP no tiene el formato correcto. Debe tener 18 caracteres alfanuméricos.",
"email": "El correo electrónico no tiene un formato válido. Ejemplo: usuario@dominio.com.",
"phone": "El teléfono solo puede contener dígitos, espacios y los símbolos: +, -, (, ).",
"contact": "El nombre de contacto contiene caracteres no permitidos. Use solo letras, números y puntuación básica.",
# Partes (A76)
"sector": "El Sector solo puede contener números, máximo 8 dígitos (sin espacios ni caracteres especiales).",
}
def _friendly_message(field_key: str, error_type: str) -> str:
"""Devuelve un mensaje de error legible en español según el campo y tipo de error."""
if error_type in ("greater_than_equal",):
if field_key in ("unit_cost", "unit_weight"):
return f"El campo '{_FIELD_LABELS.get(field_key, field_key)}' no puede ser negativo."
return f"El campo '{_FIELD_LABELS.get(field_key, field_key)}' debe ser mayor o igual a 0."
if error_type in ("string_pattern_mismatch", "value_error"):
return _FIELD_PATTERN_MESSAGES.get(
field_key,
f"El campo '{_FIELD_LABELS.get(field_key, field_key)}' contiene un valor con formato inválido.",
)
if error_type in ("decimal_parsing", "decimal_type", "float_parsing", "float_type", "int_parsing", "int_type"):
return (
f"El campo '{_FIELD_LABELS.get(field_key, field_key)}' debe ser numérico. "
"Si no aplica, déjelo vacío."
)
if error_type in ("literal_error",):
if field_key == "fraction_type":
return "El campo 'Tipo de tarifa' es inválido. Seleccione una opción predefinida."
return f"El campo '{_FIELD_LABELS.get(field_key, field_key)}' contiene una opción inválida."
if error_type == "string_too_long":
return f"El campo '{_FIELD_LABELS.get(field_key, field_key)}' excede la longitud máxima permitida."
if error_type == "string_too_short":
return f"El campo '{_FIELD_LABELS.get(field_key, field_key)}' es demasiado corto."
if error_type in ("missing", "value_error.missing"):
return f"El campo '{_FIELD_LABELS.get(field_key, field_key)}' es obligatorio."
return f"El campo '{_FIELD_LABELS.get(field_key, field_key)}' contiene un valor inválido."
async def validation_exception_handler(
request: Request,
exc: RequestValidationError,
) -> JSONResponse:
"""
Manejador para errores de validación de Pydantic/FastAPI.
Devuelve mensajes legibles en español.
"""
errors = []
for error in exc.errors():
loc_parts = [str(loc) for loc in error["loc"] if loc != "body"]
field = ".".join(loc_parts)
field_key = loc_parts[-1] if loc_parts else ""
errors.append(
{
"field": field,
"message": _friendly_message(field_key, error["type"]),
"type": error["type"],
}
)
print(f"DEBUG REQUEST VALIDATION ERRORS: {errors}")
logger.warning(
f"Validation Error en {request.url.path}",
extra={"errors": errors},
)
summary = (
errors[0]["message"]
if len(errors) == 1
else f"Hay {len(errors)} errores de validación: " + " | ".join(e["message"] for e in errors)
)
response = JSONResponse(
status_code=status.HTTP_422_UNPROCESSABLE_CONTENT,
content={
"error": "VALIDATION_ERROR",
"message": summary,
"status_code": status.HTTP_422_UNPROCESSABLE_CONTENT,
"errors": errors,
},
)
for k, v in _cors_headers(request).items():
response.headers[k] = v
return response
import traceback
async def inner_validation_exception_handler(
request: Request,
exc: ValidationError,
) -> JSONResponse:
"""
Manejador para errores de validación de Pydantic lanzados internamente (como en tenant_crud_routes).
"""
traceback.print_exc()
errors = []
for error in exc.errors():
loc_parts = [str(loc) for loc in error["loc"] if loc != "body"]
field = ".".join(loc_parts)
field_key = loc_parts[-1] if loc_parts else ""
errors.append(
{
"field": field,
"message": _friendly_message(field_key, error["type"]),
"type": error["type"],
}
)
print(f"DEBUG VALIDATION ERRORS: {errors}")
logger.warning(
f"Inner Validation Error en {request.url.path}",
extra={"errors": errors},
)
summary = (
errors[0]["message"]
if len(errors) == 1
else f"Hay {len(errors)} errores de validación: " + " | ".join(e["message"] for e in errors)
)
response = JSONResponse(
status_code=status.HTTP_422_UNPROCESSABLE_CONTENT,
content={
"error": "VALIDATION_ERROR",
"message": summary,
"status_code": status.HTTP_422_UNPROCESSABLE_CONTENT,
"errors": errors,
},
)
for k, v in _cors_headers(request).items():
response.headers[k] = v
return response
async def integrity_error_handler(
request: Request,
exc: IntegrityError,
) -> JSONResponse:
"""
Manejador para errores de integridad de la base de datos
"""
logger.error(
f"Database Integrity Error: {str(exc.orig)}",
extra={
"path": request.url.path,
"method": request.method,
},
)
orig_msg = str(exc.orig).lower()
# Check for unique/duplicate key violations (English and Spanish)
if any(kw in orig_msg for kw in ["unique constraint", "duplicate key", "duplicada", "unicidad", "ya existe"]):
error_message = "El registro ya existe. Verifica los campos únicos (Año, Aduana, Patente, Número, etc.)."
# Check for foreign key violations (English and Spanish)
elif any(kw in orig_msg for kw in ["foreign key", "foránea", "referencia"]):
error_message = "Referencia inválida a otro registro. Verifica las categorías y catálogos seleccionados."
# Check for not null violations (English and Spanish)
elif any(kw in orig_msg for kw in ["not null", "no nulo", "valor nulo"]):
error_message = "Falta un campo requerido. Asegúrate de llenar todos los datos obligatorios."
else:
error_message = "Error de integridad en la base de datos"
response = JSONResponse(
status_code=status.HTTP_409_CONFLICT,
content={
"error": "DATABASE_INTEGRITY_ERROR",
"message": error_message,
"status_code": status.HTTP_409_CONFLICT,
},
)
for k, v in _cors_headers(request).items():
response.headers[k] = v
return response
async def sqlalchemy_error_handler(
request: Request,
exc: SQLAlchemyError,
) -> JSONResponse:
"""
Manejador para errores generales de SQLAlchemy
"""
logger.error(
f"Database Error: {str(exc)}",
extra={
"path": request.url.path,
"method": request.method,
},
exc_info=True,
)
response = JSONResponse(
status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
content={
"error": "DATABASE_ERROR",
"message": f"Error en la operación de base de datos: {str(exc)}",
"status_code": status.HTTP_500_INTERNAL_SERVER_ERROR,
},
)
for k, v in _cors_headers(request).items():
response.headers[k] = v
return response
async def http_exception_handler(
request: Request,
exc: HTTPException,
) -> JSONResponse:
"""
Manejador para HTTPException de FastAPI
"""
return JSONResponse(
status_code=exc.status_code,
content={
"error": "HTTP_ERROR",
"message": exc.detail,
"status_code": exc.status_code,
},
)
async def general_exception_handler(
request: Request,
exc: Exception,
) -> JSONResponse:
"""
Manejador para excepciones no capturadas
"""
logger.error(
f"Unhandled Exception: {str(exc)}",
extra={
"path": request.url.path,
"method": request.method,
},
exc_info=True,
)
response = JSONResponse(
status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
content={
"error": "INTERNAL_SERVER_ERROR",
"message": f"Error interno del servidor: {str(exc)}",
"status_code": status.HTTP_500_INTERNAL_SERVER_ERROR,
},
)
for k, v in _cors_headers(request).items():
response.headers[k] = v
return response
def register_exception_handlers(app) -> None:
"""
Registra todos los manejadores de excepciones en la aplicación FastAPI
Args:
app: Instancia de FastAPI
"""
app.add_exception_handler(BaseAPIException, base_exception_handler)
app.add_exception_handler(HTTPException, http_exception_handler)
app.add_exception_handler(RequestValidationError, validation_exception_handler)
app.add_exception_handler(ValidationError, inner_validation_exception_handler)
app.add_exception_handler(IntegrityError, integrity_error_handler)
app.add_exception_handler(SQLAlchemyError, sqlalchemy_error_handler)
app.add_exception_handler(Exception, general_exception_handler)