英文:
Adding 2 Hashmaps to a single document in Firestore
问题
我已经将一个Hashmap上传到了Firestore。当我尝试上传另一个Hashmap到同一个文档时，它会替换掉之前的Hashmap。为什么会这样呢？
我每次都更改String标题，但它仍然会替换掉之前的Hashmap。
String poll1 = Poll1.getText().toString().trim();
String poll2 = Poll2.getText().toString().trim();
String poll3 = Poll3.getText().toString().trim();
String title = Title.getText().toString().trim();
DocumentReference documentReference = firestore.collection("Polls").document("abc1");
Map<String, Object> nestedData = new HashMap<>();
nestedData.put(poll1, 0);
nestedData.put(poll2, 0);
nestedData.put(poll3, 0);
Map<String, Object> upload = new HashMap<>();
upload.put(title, nestedData);
documentReference.set(upload).addOnCompleteListener(new OnCompleteListener<Void>() {
@Override
public void onComplete(@NonNull Task<Void> task) {
Toast.makeText(polls.this, "已上传", Toast.LENGTH_LONG).show();
}
}).addOnFailureListener(new OnFailureListener() {
@Override
public void onFailure(@NonNull Exception e) {
Toast.makeText(polls.this, "上传失败", Toast.LENGTH_LONG).show();
}
});
英文:
I have uploaded 1 Hashmap to firestore.And when i try to upload one more Hashmap to the same document it replaces my previous Hashmap.Why is it so?
I change the String title everytime and still it replaces the previous Hashmap.
String poll1 = Poll1.getText().toString().trim();
String poll2 = Poll2.getText().toString().trim();
String poll3 = Poll3.getText().toString().trim();
String title = Title.getText().toString().trim();
DocumentReference documentReference = firestore.collection("Polls").document("abc1");
Map<String, Object> nestedData = new HashMap<>();
nestedData.put(poll1 , 0 );
nestedData.put(poll2 , 0);
nestedData.put(poll3 , 0);
Map<String, Object> upload = new HashMap<>();
upload.put(title, nestedData);
documentReference.set(upload).addOnCompleteListener(new OnCompleteListener<Void>() {
@Override
public void onComplete(@NonNull Task<Void> task) {
Toast.makeText(polls.this, "UPLOADED", Toast.LENGTH_LONG).show();
}
}).addOnFailureListener(new OnFailureListener() {
@Override
public void onFailure(@NonNull Exception e) {
Toast.makeText(polls.this, "FAILED", Toast.LENGTH_LONG).show();
}
});
答案1
得分: 1
你的文档需要提到，这必须合并而不是替换。
.set(data, SetOptions.merge())
如果有效，尝试这样做。
documentReference.set(upload, SetOptions.merge()).addOnCompleteListener(new OnCompleteListener<Void>() {
@Override
public void onComplete(@NonNull Task<Void> task) {
Toast.makeText(polls.this, "已上传", Toast.LENGTH_LONG).show();
}
}).addOnFailureListener(new OnFailureListener() {
@Override
public void onFailure(@NonNull Exception e) {
Toast.makeText(polls.this, "上传失败", Toast.LENGTH_LONG).show();
}
});
英文:
your document needs to mention that this has to be merged instead replace.
.set(data, SetOptions.merge())
Try this if it works.
documentReference.set(upload, SetOptions.merge()).addOnCompleteListener(new OnCompleteListener<Void>() {
@Override
public void onComplete(@NonNull Task<Void> task) {
Toast.makeText(polls.this, "UPLOADED", Toast.LENGTH_LONG).show();
}
}).addOnFailureListener(new OnFailureListener() {
@Override
public void onFailure(@NonNull Exception e) {
Toast.makeText(polls.this, "FAILED", Toast.LENGTH_LONG).show();
}
});
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