CODEWITHSUNDEEP
javaandroidfirebasegoogle-cloud-firestore
Jomer
Jomer

Reputation: 139

How to give id to post in Cloud Firestore?

I want to make this structure in my Cloud Firestore of a Post: I want to make this structure in my Cloud Firestore of a Post:

 Users
   |
   |-> UserId
           |
           |-> OneUserPosts
                   |
                   |->PostId
                         |
                         |-> PostContent
                             Comment 1
                             Comment 2

Below is the activity where i want to create a post: How can i give id to my post ?

  public class Add_Post extends AppCompatActivity {
         EditText posttext;
     FirebaseUser user;
 

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_add__post);
        user = FirebaseAuth.getInstance().getCurrentUser();
        Toolbar toolbar = findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);
        ActionBar actionBar = getSupportActionBar();
        getSupportActionBar().setDisplayShowHomeEnabled(true);
        try {
            actionBar.setTitle("Write Your Post");

        actionBar.setDisplayShowHomeEnabled(true);
        actionBar.setDisplayHomeAsUpEnabled(true);
        }catch (NullPointerException e){}
        posttext = findViewById(R.id.PostTextTextMultiLine);
  }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        MenuInflater menuInflater = getMenuInflater();
        menuInflater.inflate(R.menu.addpostmenu, menu);
        return super.onCreateOptionsMenu(menu);
    }

    @Override
    public boolean onOptionsItemSelected(@NonNull MenuItem item) {

        switch (item.getItemId()){
            case R.id.POST:

    savepost();

                break;
        }
        return super.onOptionsItemSelected(item);
    }

    private void savepost() {
        String Post = posttext.getText().toString();

        if (Post.length()<5){
            Toast.makeText(this, "Please enter at least 10 words ", Toast.LENGTH_SHORT).show();

        }
        else{
         try {

            CollectionReference postref = FirebaseFirestore.getInstance()
                    .collection("Users").document(user.getUid()).collection("OneUserPost");
            postref.add(new posttextlist(Post));
            Toast.makeText(this, "Successfully Posted", Toast.LENGTH_SHORT).show();
            finish();
            startActivity(new Intent(this,MainActivity.class));
}catch (NullPointerException e){}
        }


    }

}

Please solve my problem. I searched everywhere but i didn't get answer. Please solve my problem. I searched everywhere but i didn't get answer.

Upvotes: 1

Views: 55

Answers (1)

Alex Mamo
Alex Mamo

Reputation: 138869

When you are using the following line of code:

postref.add(new posttextlist(Post));

CollectionReference's add(Object data):

Adds a new document to this collection with the specified data, assigning it a document ID automatically.

If don't need this behavior, then you should use DocumentReference's set(Object data):

Overwrites the document referred to by this DocumentReference.

So your code should like this:

CollectionReference postref = FirebaseFirestore.getInstance()
                .collection("Users").document(user.getUid())
                .collection("OneUserPost");
String id = postref.getId(); //Do what you need to do with this id
postref.document(id).set(new posttextlist(Post));

Upvotes: 2

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