This is what my Firestore data structure looks like
Hello, i have an issue and i have searched online but nothing seem to come close to what am facing. i am using firestore to store my data
This is the users node. user section
And this is the user_account_settings node. user_account_settings section
The goal is to loop through these nodes and retrieve/get data from the node and set them into text and display them using custom models.
this is the model for Account settings
public class UserAccountSettings {
private String description;
private String display_name;
private long followers;
private long following;
private long posts;
private String profile_photo;
private String username;
private String website;
public UserAccountSettings(String description, String display_name, long followers, long following,
long posts, String profile_photo, String username, String website) {
this.description = description;
this.display_name = display_name;
this.followers = followers;
this.following = following;
this.posts = posts;
this.profile_photo = profile_photo;
this.username = username;
this.website = website;
}
public UserAccountSettings(){
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public String getDisplay_name() {
return display_name;
}
public void setDisplay_name(String display_name) {
this.display_name = display_name;
}
public long getFollowers() {
return followers;
}
public void setFollowers(long followers) {
this.followers = followers;
}
public long getFollowing() {
return following;
}
public void setFollowing(long following) {
this.following = following;
}
public long getPosts() {
return posts;
}
public void setPosts(long posts) {
this.posts = posts;
}
public String getProfile_photo() {
return profile_photo;
}
public void setProfile_photo(String profile_photo) {
this.profile_photo = profile_photo;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getWebsite() {
return website;
}
public void setWebsite(String website) {
this.website = website;
}
@Override
public String toString() {
return "UserAccountSettings{" +
"description='" + description + '\'' +
", display_name='" + display_name + '\'' +
", followers=" + followers +
", following=" + following +
", posts=" + posts +
", profile_photo='" + profile_photo + '\'' +
", username='" + username + '\'' +
", website='" + website + '\'' +
'}';
}
}
and user model
public class User {
private String user_id;
private long phone_number;
private String email;
private String username;
public User(String user_id, long phone_number, String email, String username) {
this.user_id = user_id;
this.phone_number = phone_number;
this.email = email;
this.username = username;
}
public User(){
}
public String getUser_id() {
return user_id;
}
public void setUser_id(String user_id) {
this.user_id = user_id;
}
public long getPhone_number() {
return phone_number;
}
public void setPhone_number(long phone_number) {
this.phone_number = phone_number;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
@Override
public String toString() {
return "User{" +
"user_id='" + user_id + '\'' +
", phone_number='" + phone_number + '\'' +
", email='" + email + '\'' +
", username='" + username + '\'' +
'}';
}
}
User settings (Holding both user and user_account_settings)
public class UserSettings {
//for handling multilple queries in database : users and user_account_settings.
private User user;
private UserAccountSettings settings;
public UserSettings(User user, UserAccountSettings settings) {
this.user = user;
this.settings = settings;
}
public UserSettings(ArrayList<User> mUser, ArrayList<UserAccountSettings> mSettings){
}
public User getUser() {
return user;
}
public void setUser(User user) {
this.user = user;
}
public UserAccountSettings getSettings() {
return settings;
}
public void setSettings(UserAccountSettings settings) {
this.settings = settings;
}
@Override
public String toString() {
return "UserSettings{" +
"user=" + user +
", settings=" + settings +
'}';
}
}
trying to retrieve and set the data from firestore to the models
public UserSettings getUserSettings(final DocumentSnapshot documentSnapshot){
Log.d(TAG, "getUserSettings: retrieving user account settings from firestore");
final ArrayList<UserAccountSettings> mSettings = new ArrayList<>();
final ArrayList<User> mUser = new ArrayList<>();
//handling user_account_settings_node.
mFirestore.collection("user_account_settings").addSnapshotListener(new EventListener<QuerySnapshot>() {
@Override
public void onEvent(QuerySnapshot documentSnapshots, FirebaseFirestoreException e) {
if (e != null){
Log.w(TAG, "onEvent: FirebaseFirestoreException", e);
return;
}
for (DocumentSnapshot document : documentSnapshots) {
Log.d(TAG, document.getId() + " => " + document.getData());
if (document.getId().equals("user_account_settings")){
Log.d(TAG, "checking if id equals user_account_settings: yes, it does");
Log.d(TAG, "onSuccess: Document" + document.getId() + ";" + document.getData());
UserAccountSettings settings = document.toObject(UserAccountSettings.class);
Log.d(TAG, "UserAccountSettings: " + "username is" + settings.getUsername());
settings.setDisplay_name(documentSnapshot.getString("display_name"));
settings.setUsername(documentSnapshot.getString("username"));
settings.setWebsite(documentSnapshot.getString("website"));
settings.setProfile_photo(documentSnapshot.getString("profile_photo"));
settings.setPosts(documentSnapshot.getLong("posts"));
settings.setFollowers(documentSnapshot.getLong("followers"));
settings.setFollowing(documentSnapshot.getLong("following"));
mSettings.add(settings);
}
}
}
});
//handling users node.
mFirestore.collection("users").addSnapshotListener(new EventListener<QuerySnapshot>() {
@Override
public void onEvent(QuerySnapshot documentSnapshots, FirebaseFirestoreException e) {
if (e != null){
Log.w(TAG, "onEvent: ", e);
return;
}
for (DocumentSnapshot document : documentSnapshots) {
Log.d(TAG, document.getId() + " => " + document.getData());
if (document.getId().equals(mContext.getString(R.string.dbname_users))){
Log.d(TAG, "checking if id equals user_account_settings: yes, it does");
Log.d(TAG, "onSuccess: Document" + document.getId() + ";" + document.getData());
User user = document.toObject(User.class);
Log.d(TAG, "user: got the user information" + "user I.D is "+ user.getUser_id());
user.setUsername(documentSnapshot.getString("username"));
user.setEmail(documentSnapshot.getString("email"));
user.setPhone_number(documentSnapshot.getLong("phone_number"));
user.setUser_id(documentSnapshot.getString("user_id"));
mUser.add(user);
}
}
}
});
return new UserSettings(mUser, mSettings );
}
and i try getting these data from the documents
//setting Profile Widgets
private void setProfileWidgets(UserSettings userSettings){
Log.d(TAG, "setProfileWidgets: Setting widgets with data retrieved from firebase firestore" + userSettings.toString());
Log.d(TAG, "setProfileWidgets: searching for username" + userSettings.getSettings().getUsername());
User user = userSettings.getUser();
UserAccountSettings settings = userSettings.getSettings();
try {
UniversalImageLoader.setSingleImage(settings.getProfile_photo(), mProfilePhoto, null, "");
mDisplayname.setText(settings.getDisplay_name());
mUsername.setText(settings.getUsername());
mWebsite.setText(settings.getWebsite());
mDescription.setText(settings.getDescription());
mPosts.setText(String.valueOf(settings.getPosts()));
mFollowers.setText(String.valueOf(settings.getFollowers()));
mFollowing.setText(String.valueOf(settings.getFollowing()));
mProgressBar.setVisibility(View.GONE);
}
catch (NullPointerException e){
Log.e(TAG, "setProfileWidgets: NullPointerException" + e.getMessage());
}
}
then i initialize the widgets
mFirebaseFirestore = FirebaseFirestore.getInstance();
myUserRef = mFirebaseFirestore.collection("users");
myUserSettingsRef = mFirebaseFirestore.collection("user_account_settings");
myUserSettingsRef.addSnapshotListener(new EventListener<QuerySnapshot>() {
@Override
public void onEvent(QuerySnapshot documentSnapshot, FirebaseFirestoreException e) {
if (e != null){
Log.w(TAG, "onEvent: ", e);
return;
}
for (DocumentSnapshot document : documentSnapshot) {
Log.d(TAG, document.getId() + " => " + document.getData());
//retrieve user information from the database
setProfileWidgets(mFirebaseMethods.getUserSettings(document));
}
}
});
myUserRef.addSnapshotListener(new EventListener<QuerySnapshot>() {
@Override
public void onEvent(QuerySnapshot documentSnapshot, FirebaseFirestoreException e) {
if (e != null){
Log.w(TAG, "onEvent: ", e);
return;
}
for (DocumentSnapshot document : documentSnapshot) {
Log.d(TAG, document.getId() + " => " + document.getData());
//retrieve user information from the database
setProfileWidgets(mFirebaseMethods.getUserSettings(document));
}
}
});
When i run the app, this is what i get
if you see the code, i can see other user information. but it throws me a null pointer exception on my widgets (user=null , settings=null). i have gone through all the widgets id's and its correct am wondering if someone can point out where am getting wrong. thanks in advance
