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from typing import ClassVar
from pydantic import ValidationError, model_validator
from odmantic import Model
class SmallRectangle(Model):
MAX_AREA: ClassVar[float] = 9
length: float
width: float
@model_validator(mode="before")
def check_width_length(cls, values):
length = values.get("length", 0)
width = values.get("width", 0)
if width > length:
raise ValueError("width can't be greater than length")
return values
@model_validator(mode="before")
def check_area(cls, values):
length = values.get("length", 0)
width = values.get("width", 0)
if length * width > cls.MAX_AREA:
raise ValueError(f"area is greater than {cls.MAX_AREA}")
return values
print(SmallRectangle(length=2, width=1))
# > id=ObjectId('5f81e3c073103f509f97e374'), length=2.0, width=1.0
try:
SmallRectangle(length=2)
except ValidationError as e:
print(e)
"""
1 validation error for SmallRectangle
width
field required (type=value_error.missing)
"""
try:
SmallRectangle(length=2, width=3)
except ValidationError as e:
print(e)
"""
1 validation error for SmallRectangle
Value error, width can't be greater than length
"""
try:
SmallRectangle(length=4, width=3)
except ValidationError as e:
print(e)
"""
1 validation error for SmallRectangle
__root__
Value error, area is greater than 9
"""
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