Exam Professional Cloud Developer topic 1 question 272 discussion

B: The best practice for this scenario would be to create one root collection for user profiles and one subcollection for each user's posts. This allows for easy retrieval of all posts for a given user and aligns well with the hierarchical data model of Firestore. It also provides good isolation of data as each user's posts are stored separately.

I will go for B.

B is more appropriate

For migrating user profile information to Firestore in your social media company, the best approach is: B. Create one root collection for user profiles, and create one subcollection for each user's posts. This structure offers better scalability, efficient data retrieval, and clearer organization, while also simplifying access control and data modeling. Options A, C, and D are less optimal due to potential performance issues, complex querying, and counterintuitive data relationships.