我创建了一个对象“ scanning.invoice.approval.rule”，在其中定义了一个“ one2many”字段：
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
public static final int PICK_IMAGE_REQUEST = 1;
public static final int DELAY_MILLIS = 5000;
private Button buttonChooseImage, buttonUpload;
private TextView textViewShowUpload;
private EditText editTextFileName;
private ImageView imageView;
private ProgressBar progressBar;
private Uri imageUri;
private StorageReference storageReference;
private DatabaseReference databaseReference;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
buttonChooseImage = findViewById(R.id.button_choose_image);
buttonUpload = findViewById(R.id.button_upload);
textViewShowUpload = findViewById(R.id.text_view_show_uploads);
editTextFileName = findViewById(R.id.edit_text_file_name);
imageView = findViewById(R.id.image_view);
progressBar = findViewById(R.id.progress_bar);
buttonChooseImage.setOnClickListener(this);
buttonUpload.setOnClickListener(this);
textViewShowUpload.setOnClickListener(this);
storageReference = FirebaseStorage.getInstance().getReference("uploads");
databaseReference = FirebaseDatabase.getInstance().getReference("uploads");
}
@Override
public void onClick(View view) {
switch (view.getId()) {
case R.id.button_choose_image:
openFileChooser();
break;
case R.id.button_upload:
uploadFile();
break;
case R.id.text_view_show_uploads:
break;
}
}
private String getFileExtension(Uri uri) {
ContentResolver cr = getContentResolver();
MimeTypeMap mine = MimeTypeMap.getSingleton();
return mine.getExtensionFromMimeType(cr.getType(uri));
}
private void uploadFile() {
if (imageUri != null) {
StorageReference fileRefrence = storageReference.child(System.currentTimeMillis()
+ "." + getFileExtension(imageUri));
fileRefrence.putFile(imageUri).
addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
@Override
public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
Handler handler = new Handler();
handler.postDelayed(new Runnable() {
@Override
public void run() {
progressBar.setProgress(0);
}
}, DELAY_MILLIS);
Toast.makeText(MainActivity.this, "Upload Successful", Toast.LENGTH_LONG).show();
Upload upload = new Upload(editTextFileName.getText().toString().trim(),
taskSnapshot.getMetadata().getReference().getDownloadUrl().toString());
String uploadId = databaseReference.push().getKey();
databaseReference.child(uploadId).setValue(upload);
}
})
.addOnFailureListener(new OnFailureListener() {
@Override
public void onFailure(@NonNull Exception e) {
e.printStackTrace();
Toast.makeText(MainActivity.this, e.getMessage(), Toast.LENGTH_SHORT).show();
}
})
.addOnProgressListener(new OnProgressListener<UploadTask.TaskSnapshot>() {
@Override
public void onProgress(UploadTask.TaskSnapshot taskSnapshot) {
double progress = (100.0 * taskSnapshot.getBytesTransferred() / taskSnapshot.getTotalByteCount());
progressBar.setProgress((int) progress);
}
});
} else {
Toast.makeText(this, "No File Selected", Toast.LENGTH_SHORT).show();
}
}
private void openFileChooser() {
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(intent, PICK_IMAGE_REQUEST);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == PICK_IMAGE_REQUEST && resultCode == RESULT_OK
&& data != null && data.getData() != null) {
imageUri = data.getData();
Picasso.get().load(imageUri).into(imageView);
}
}
}
此行对象的定义如下：
private void uploadFile() {
if (imageUri != null) {
StorageReference fileReference = storageReference.child("images/" + imageUri.getLastPathSegment());
UploadTask uploadTask = fileReference.putFile(imageUri);
uploadTask.addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
@Override
public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
Handler handler = new Handler();
handler.postDelayed(new Runnable() {
@Override
public void run() {
progressBar.setProgress(0);
}
}, DELAY_MILLIS);
Toast.makeText(MainActivity.this, "Upload Successful", Toast.LENGTH_LONG).show();
Upload upload = new Upload(editTextFileName.getText().toString().trim(),
taskSnapshot.getMetadata().getReference().getDownloadUrl().toString());
String uploadId = databaseReference.push().getKey();
databaseReference.child(uploadId).setValue(upload);
}
}).addOnFailureListener(new OnFailureListener() {
@Override
public void onFailure(@NonNull Exception e) {
e.printStackTrace();
Toast.makeText(MainActivity.this, e.getMessage(), Toast.LENGTH_SHORT).show();
}
}).addOnProgressListener(new OnProgressListener<UploadTask.TaskSnapshot>() {
@Override
public void onProgress(UploadTask.TaskSnapshot taskSnapshot) {
double progress = (100.0 * taskSnapshot.getBytesTransferred() / taskSnapshot.getTotalByteCount());
progressBar.setProgress((int) progress);
}
});
} else {
Toast.makeText(this, "No File Selected", Toast.LENGTH_SHORT).show();
}
}
问题是当我添加一条规则和行并保存，然后再次编辑，例如删除序列1的一行，然后添加与删除的行具有相同序列1的新行然后保存时，尽管我提出了约束刚刚删除了一行并以相同的顺序添加了另一行，我希望这很清楚，并非常感谢您的所有帮助
关于如何解决它的任何想法？
答案 0 :(得分：0)
这与Odoo的操作方式相同，Odoo使用命令来更新X2many字段 只需确保首先进行删除，然后再进行添加即可。
我不知道这是否行得通，但我认为只需订购列表即可解决问题
@api.multi
def write(self, vals):
""" make sure deletion happends before adding."""
if 'approval_line_ids' in vals:
deleting_commands = []
other_commands = []
for command in vals.get('approval_line_ids', []):
if command[0] in [2,3,5]:
deleting_commands.append(command)
else:
other_commands.append(command)
ordered_commands = deleting_commands + other_commands
vals['approval_line_ids'] = ordered_commands
return super(ClassName, self).write(vals)
如果第一个解决方案无效，请尝试以下操作： 这可能会使处理速度变慢，因为您会两次调用write：
@api.multi
def write(self, vals):
""" make sure deletion happends before adding."""
if 'approval_line_ids' in vals:
deleting_commands = []
other_commands = []
for command in vals.get('approval_line_ids', []):
if command[0] in [2,3,5]:
deleting_commands.append(command)
else:
other_commands.append(command)
if deleting_commands:
# If there is a deleting do it first
vals['approval_line_ids'] = deleting_commands
super(ClassName, self).write(vals)
# redefine vals to perform just other commands
vals = {'approval_line_ids': other_commands}
return super(ClassName, self).write(vals)