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from collections.abc import Collection
from dataclasses import dataclass, field
from uuid import UUID, uuid4
import pytest
from graphql import print_schema
from apischema import ValidationError, deserialize, serialize
from apischema.graphql import graphql_schema
from apischema.json_schema import deserialization_schema
# Define a schema with standard dataclasses
@dataclass
class Resource:
id: UUID
name: str
tags: set[str] = field(default_factory=set)
# Get some data
uuid = uuid4()
data = {"id": str(uuid), "name": "wyfo", "tags": ["some_tag"]}
# Deserialize data
resource = deserialize(Resource, data)
assert resource == Resource(uuid, "wyfo", {"some_tag"})
# Serialize objects
assert serialize(Resource, resource) == data
# Validate during deserialization
with pytest.raises(ValidationError) as err: # pytest checks exception is raised
deserialize(Resource, {"id": "42", "name": "wyfo"})
assert err.value.errors == [
{"loc": ["id"], "err": "badly formed hexadecimal UUID string"}
]
# Generate JSON Schema
assert deserialization_schema(Resource) == {
"$schema": "http://json-schema.org/draft/2020-12/schema#",
"type": "object",
"properties": {
"id": {"type": "string", "format": "uuid"},
"name": {"type": "string"},
"tags": {
"type": "array",
"items": {"type": "string"},
"uniqueItems": True,
"default": [],
},
},
"required": ["id", "name"],
"additionalProperties": False,
}
# Define GraphQL operations
def resources(tags: Collection[str] | None = None) -> Collection[Resource] | None:
...
# Generate GraphQL schema
schema = graphql_schema(query=[resources], id_types={UUID})
schema_str = """\
type Query {
resources(tags: [String!]): [Resource!]
}
type Resource {
id: ID!
name: String!
tags: [String!]!
}"""
assert print_schema(schema) == schema_str
|
