Function getUniqueFields

packages/language/src/utils.ts:298–312

(model: DataModel)

 * TODO: merge this with {@link getModelUniqueFields}
 */
export function getUniqueFields(model: DataModel) {
    const uniqueAttrs = model.attributes.filter(
        (attr) => attr.decl.ref?.name === '@@unique' || attr.decl.ref?.name === '@@id',
    );
    return uniqueAttrs.map((uniqueAttr) => {
        const fieldsArg = uniqueAttr.args.find((a) => a.$resolvedParam?.name === 'fields');
        if (!fieldsArg || !isArrayExpr(fieldsArg.value)) {
            return [];
        }

        return fieldsArg.value.items
            .filter((item): item is ReferenceExpr => isReferenceExpr(item))
            .map((item) => resolved(item.target) as DataField);
    });
}

/**
 * Finds the first ancestor of the given AST node that satisfies the given predicate function. Returns `undefined` if no such ancestor is found.