Troubleshooting Firestore Error: No Setter/Field Found for Class Android

Introduction:

Firestore is a powerful NoSQL database provided by Google as part of the Google Cloud Collective. When working with Firestore, developers may encounter the “W/Firestore: [CustomClassMapper] : No setter/field for class Android” error. In this blog post, we will delve into the reasons behind this error and provide solutions to resolve it. By understanding the root cause and implementing the correct approach, developers can overcome this error and effectively work with Firestore. Let’s dive in and solve the mystery!

Understanding the Error:

The error message “W/Firestore: [CustomClassMapper] : No setter/field for class Android” indicates that there is a mismatch between the field names in your Firestore database and the corresponding fields in yourDocuments class. Firestore uses reflection to map the data from your documents to the fields in your class, and it requires the field names to match exactly. Let’s take a closer look at the code snippet that triggers this error:

code







public class Documents extends DocumentID {
    String documentName;
    String documentDate;
    String inspectorName;
    String marketLocation;

    // Constructors, getters, and setters
}

code


public class DocumentList extends RecyclerView.Adapter<DocumentList.ViewHolder> {
    // Adapter implementation
}

code


public class StartCounting extends AppCompatActivity {
    // Activity implementation
}

Analyzing the Code:

Upon analyzing the code, we can see that the field names in the Documents class (documentName, documentDate, inspectorName, and marketLocation) do not match the corresponding property names in the Firestore database (Document Name, Document Date, Inspector Name, and Market Location).

Fixing the Error:

To resolve this error, we have two possible solutions:

Modify Field Names

In this solution, you can change the field names in your Documents class to match the property names in the Firestore database. Update your Documents class as follows:

code







public class Documents extends DocumentID {
    String documentName;
    String documentDate;
    String inspectorName;
    String marketLocation;

    // Constructors, getters, and setters
}

Make sure the field names (documentName, documentDate, inspectorName, and marketLocation) exactly match the property names in the Firestore database (Document Name, Document Date, Inspector Name, and Market Location).

Use Annotations

In this solution, you can use annotations to specify the property names in the Firestore database that correspond to your fields in the Documents class. Update your Documents class as follows:

code














public class Documents extends DocumentID {
    @PropertyName("Document Name")
    String documentName;

    @PropertyName("Document Date")
    String documentDate;

    @PropertyName("Inspector Name")
    String inspectorName;

    @PropertyName("Market Location")
    String marketLocation;

    // Constructors, getters, and setters
}

By using the @PropertyName annotation, you can explicitly specify the property names that match the fields in your Documents class.

Conclusion:

In this blog post, we explored the “W/Firestore: [CustomClassMapper] : No setter/field for class Android” error and provided solutions to resolve it. By ensuring that the field names in your class match the property names in the Firestore database, you can successfully map data from Firestore to your class. Firestore is a powerful database that empowers developers to build scalable and flexible applications. With these insights, you can overcome this error and harness the full potential of Firestore in your Android development journey.