使用Firestore / Angularfire2或Firestore SDK查詢集合中的內部對象ID

Question

您能告訴我如何在budgets集合中查詢budgetGroup對象的id嗎？

我可以進行如下基本查詢。 但是，如何如上所述查詢內部對象？

provider.ts

 getSpecificBudget(id:string;budgetGroup: BudgetGroup, projectId: string): AngularFirestoreCollection<Budget> {
    return this.fireStore.collection<Budget>(`projects/${projectId}/budgets`, ref => ref
      .where('id', '==', id)
    );
  }

模型

export class Budget {
    id: string;
    amount: number;
    contingency: number = 20;
    budgetGroup: BudgetGroup = new BudgetGroup();
    creationTime: string;
}

export class BudgetGroup {
    id: string;
    name: string;
    creationTime: string;
}

消防站：

Answer 1

這是解決方案。我們可以簡單地如下所示。 即 .where('budgetGroup.id', '==', budgetGroup.id)

getSpecificBudgetGroupBudget(budgetGroup: BudgetGroup, projectId: string): AngularFirestoreCollection<Budget> {
    return this.fireStore.collection<Budget>(`projects/${projectId}/budgets`, ref => ref
      .where('budgetGroup.id', '==', budgetGroup.id)
    );
  }