Function findPyDiscriminator

scripts/codegen/python.ts:1692–1735

(
    variants: JSONSchema7[]
)

}

function findPyDiscriminator(
    variants: JSONSchema7[]
): { property: string; mapping: Map<string, JSONSchema7> } | null {
    if (variants.length === 0) {
        return null;
    }

    const firstVariant = variants[0];
    if (!firstVariant.properties) {
        return null;
    }

    for (const [propName, propSchema] of Object.entries(firstVariant.properties)) {
        if (typeof propSchema !== "object") {
            continue;
        }
        if ((propSchema as JSONSchema7).const === undefined) {
            continue;
        }

        const mapping = new Map<string, JSONSchema7>();
        let valid = true;
        for (const variant of variants) {
            if (!variant.properties) {
                valid = false;
                break;
            }

            const variantProp = variant.properties[propName];
            if (typeof variantProp !== "object" || (variantProp as JSONSchema7).const === undefined) {
                valid = false;
                break;
            }

            mapping.set(String((variantProp as JSONSchema7).const), variant);
        }

        if (valid && mapping.size === variants.length) {
            return { property: propName, mapping };
        }
    }

    return null;
}

function isPyNullLikeSchema(schema: JSONSchema7): boolean {
    return schema.type === "null" ||