Path.resolve

level: ProjectLevel
    name: str
    updated_at: datetime

    @staticmethod
    def resolve_key(obj: ProjectModel) -> str:
        """Resolve key."""
        return obj.nest_key

class Project(ProjectBase):
    """Schema for Project (minimal fields for list display)."""

class ProjectDetail(ProjectBase):
    """Detail schema for Project (used in single item endpoints)."""

    description: str
    leaders: list[Leader]

    @staticmethod
    def resolve_leaders(obj):
        """Resolve leaders."""
        return [
            Leader(key=leader.member.login if leader.member else None, name=leader.member_name)

Handle asynchronous operations:

```javascript
// Promise
function fetchData() {
    return new Promise((resolve, reject) => {
        setTimeout(() => {
            resolve('Data fetched successfully');
        }, 1000);
    });
}

// Using .then()
fetchData()
    .then(data => console.log(data))
    .catch(error => console.error(error));

// Using async/await
async function getData() {
    try {
        const data = await fetchData();
        console.log(data);
    } catch (error) {
        console.error(error);
    }