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from dataclasses import dataclass, field
import pytest
from apischema import (
Undefined,
UndefinedType,
ValidationError,
dependent_required,
deserialize,
)
from apischema.json_schema import deserialization_schema
@dataclass
class Billing:
name: str
# Fields used in dependencies MUST be declared with `field`
credit_card: int | UndefinedType = field(default=Undefined)
billing_address: str | UndefinedType = field(default=Undefined)
dependencies = dependent_required({credit_card: [billing_address]})
# it can also be done outside the class with
# dependent_required({"credit_card": ["billing_address"]}, owner=Billing)
assert deserialization_schema(Billing) == {
"$schema": "http://json-schema.org/draft/2020-12/schema#",
"additionalProperties": False,
"dependentRequired": {"credit_card": ["billing_address"]},
"properties": {
"name": {"type": "string"},
"credit_card": {"type": "integer"},
"billing_address": {"type": "string"},
},
"required": ["name"],
"type": "object",
}
with pytest.raises(ValidationError) as err:
deserialize(Billing, {"name": "Anonymous", "credit_card": 1234_5678_9012_3456})
assert err.value.errors == [
{
"loc": ["billing_address"],
"err": "missing property (required by ['credit_card'])",
}
]
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