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Posted to commits@superset.apache.org by be...@apache.org on 2020/12/10 22:50:39 UTC

[incubator-superset] branch master updated: feat: confirm overwrite when importing (#11982)

This is an automated email from the ASF dual-hosted git repository.

beto pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/incubator-superset.git


The following commit(s) were added to refs/heads/master by this push:
     new 475f59c  feat: confirm overwrite when importing (#11982)
475f59c is described below

commit 475f59cb1cb0b4789b81fd893e9e919c03f30e9c
Author: Beto Dealmeida <ro...@dealmeida.net>
AuthorDate: Thu Dec 10 14:50:10 2020 -0800

    feat: confirm overwrite when importing (#11982)
    
    * feat: confirm overwrite when importing
    
    * Skip flaky test
---
 superset/charts/api.py                             |  19 +++-
 superset/charts/commands/importers/v1/__init__.py  |   7 +-
 superset/commands/importers/v1/__init__.py         |  51 ++++++++---
 superset/dashboards/api.py                         |  19 +++-
 .../dashboards/commands/importers/v1/__init__.py   |   7 +-
 superset/databases/api.py                          |  19 +++-
 .../databases/commands/importers/v1/__init__.py    |   7 +-
 superset/datasets/api.py                           |  19 +++-
 .../datasets/commands/importers/v1/__init__.py     |   7 +-
 tests/charts/api_tests.py                          |  87 +++++++++++++++---
 tests/charts/commands_tests.py                     |   2 +-
 tests/dashboards/api_tests.py                      | 101 +++++++++++++++++----
 tests/dashboards/commands_tests.py                 |   2 +-
 tests/databases/api_tests.py                       |  84 ++++++++++++++---
 tests/databases/commands_tests.py                  |   6 +-
 tests/datasets/api_tests.py                        |  93 +++++++++++++++----
 tests/datasets/commands_tests.py                   |   6 +-
 17 files changed, 427 insertions(+), 109 deletions(-)

diff --git a/superset/charts/api.py b/superset/charts/api.py
index 59a8dfc..a3a2737 100644
--- a/superset/charts/api.py
+++ b/superset/charts/api.py
@@ -845,11 +845,19 @@ class ChartRestApi(BaseSupersetModelRestApi):
         ---
         post:
           requestBody:
+            required: true
             content:
-              application/zip:
+              multipart/form-data:
                 schema:
-                  type: string
-                  format: binary
+                  type: object
+                  properties:
+                    formData:
+                      type: string
+                      format: binary
+                    passwords:
+                      type: string
+                    overwrite:
+                      type: bool
           responses:
             200:
               description: Chart import result
@@ -883,8 +891,11 @@ class ChartRestApi(BaseSupersetModelRestApi):
             if "passwords" in request.form
             else None
         )
+        overwrite = request.form.get("overwrite") == "true"
 
-        command = ImportChartsCommand(contents, passwords=passwords)
+        command = ImportChartsCommand(
+            contents, passwords=passwords, overwrite=overwrite
+        )
         try:
             command.run()
             return self.response(200, message="OK")
diff --git a/superset/charts/commands/importers/v1/__init__.py b/superset/charts/commands/importers/v1/__init__.py
index 62dde9f..4b3f443 100644
--- a/superset/charts/commands/importers/v1/__init__.py
+++ b/superset/charts/commands/importers/v1/__init__.py
@@ -37,6 +37,7 @@ class ImportChartsCommand(ImportModelsCommand):
 
     dao = ChartDAO
     model_name = "chart"
+    prefix = "charts/"
     schemas: Dict[str, Schema] = {
         "charts/": ImportV1ChartSchema(),
         "datasets/": ImportV1DatasetSchema(),
@@ -45,7 +46,9 @@ class ImportChartsCommand(ImportModelsCommand):
     import_error = ChartImportError
 
     @staticmethod
-    def _import(session: Session, configs: Dict[str, Any]) -> None:
+    def _import(
+        session: Session, configs: Dict[str, Any], overwrite: bool = False
+    ) -> None:
         # discover datasets associated with charts
         dataset_uuids: Set[str] = set()
         for file_name, config in configs.items():
@@ -88,4 +91,4 @@ class ImportChartsCommand(ImportModelsCommand):
             ):
                 # update datasource id, type, and name
                 config.update(dataset_info[config["dataset_uuid"]])
-                import_chart(session, config, overwrite=True)
+                import_chart(session, config, overwrite=overwrite)
diff --git a/superset/commands/importers/v1/__init__.py b/superset/commands/importers/v1/__init__.py
index 16d3314..9637ef9 100644
--- a/superset/commands/importers/v1/__init__.py
+++ b/superset/commands/importers/v1/__init__.py
@@ -31,7 +31,7 @@
 # specific language governing permissions and limitations
 # under the License.
 
-from typing import Any, Dict, List, Optional
+from typing import Any, Dict, List, Optional, Set
 
 from marshmallow import Schema, validate
 from marshmallow.exceptions import ValidationError
@@ -55,6 +55,7 @@ class ImportModelsCommand(BaseCommand):
 
     dao = BaseDAO
     model_name = "model"
+    prefix = ""
     schemas: Dict[str, Schema] = {}
     import_error = CommandException
 
@@ -62,18 +63,25 @@ class ImportModelsCommand(BaseCommand):
     def __init__(self, contents: Dict[str, str], *args: Any, **kwargs: Any):
         self.contents = contents
         self.passwords: Dict[str, str] = kwargs.get("passwords") or {}
+        self.overwrite: bool = kwargs.get("overwrite", False)
         self._configs: Dict[str, Any] = {}
 
     @staticmethod
-    def _import(session: Session, configs: Dict[str, Any]) -> None:
-        raise NotImplementedError("Subclasses MUSC implement _import")
+    def _import(
+        session: Session, configs: Dict[str, Any], overwrite: bool = False
+    ) -> None:
+        raise NotImplementedError("Subclasses MUST implement _import")
+
+    @classmethod
+    def _get_uuids(cls) -> Set[str]:
+        return {str(model.uuid) for model in db.session.query(cls.dao.model_cls).all()}
 
     def run(self) -> None:
         self.validate()
 
         # rollback to prevent partial imports
         try:
-            self._import(db.session, self._configs)
+            self._import(db.session, self._configs, self.overwrite)
             db.session.commit()
         except Exception:
             db.session.rollback()
@@ -97,6 +105,15 @@ class ImportModelsCommand(BaseCommand):
             exceptions.append(exc)
             metadata = None
 
+        # validate that the type declared in METADATA_FILE_NAME is correct
+        if metadata:
+            type_validator = validate.Equal(self.dao.model_cls.__name__)  # type: ignore
+            try:
+                type_validator(metadata["type"])
+            except ValidationError as exc:
+                exc.messages = {METADATA_FILE_NAME: {"type": exc.messages}}
+                exceptions.append(exc)
+
         # validate objects
         for file_name, content in self.contents.items():
             prefix = file_name.split("/")[0]
@@ -117,14 +134,24 @@ class ImportModelsCommand(BaseCommand):
                     exc.messages = {file_name: exc.messages}
                     exceptions.append(exc)
 
-        # validate that the type declared in METADATA_FILE_NAME is correct
-        if metadata:
-            type_validator = validate.Equal(self.dao.model_cls.__name__)  # type: ignore
-            try:
-                type_validator(metadata["type"])
-            except ValidationError as exc:
-                exc.messages = {METADATA_FILE_NAME: {"type": exc.messages}}
-                exceptions.append(exc)
+        # check if the object exists and shouldn't be overwritten
+        if not self.overwrite:
+            existing_uuids = self._get_uuids()
+            for file_name, config in self._configs.items():
+                if (
+                    file_name.startswith(self.prefix)
+                    and config["uuid"] in existing_uuids
+                ):
+                    exceptions.append(
+                        ValidationError(
+                            {
+                                file_name: (
+                                    f"{self.model_name.title()} already exists "
+                                    "and `overwrite=true` was not passed"
+                                ),
+                            }
+                        )
+                    )
 
         if exceptions:
             exception = CommandInvalidError(f"Error importing {self.model_name}")
diff --git a/superset/dashboards/api.py b/superset/dashboards/api.py
index 3f8e3ba..929406a 100644
--- a/superset/dashboards/api.py
+++ b/superset/dashboards/api.py
@@ -665,11 +665,19 @@ class DashboardRestApi(BaseSupersetModelRestApi):
         ---
         post:
           requestBody:
+            required: true
             content:
-              application/zip:
+              multipart/form-data:
                 schema:
-                  type: string
-                  format: binary
+                  type: object
+                  properties:
+                    formData:
+                      type: string
+                      format: binary
+                    passwords:
+                      type: string
+                    overwrite:
+                      type: bool
           responses:
             200:
               description: Dashboard import result
@@ -703,8 +711,11 @@ class DashboardRestApi(BaseSupersetModelRestApi):
             if "passwords" in request.form
             else None
         )
+        overwrite = request.form.get("overwrite") == "true"
 
-        command = ImportDashboardsCommand(contents, passwords=passwords)
+        command = ImportDashboardsCommand(
+            contents, passwords=passwords, overwrite=overwrite
+        )
         try:
             command.run()
             return self.response(200, message="OK")
diff --git a/superset/dashboards/commands/importers/v1/__init__.py b/superset/dashboards/commands/importers/v1/__init__.py
index 0b7b235..1c40a40 100644
--- a/superset/dashboards/commands/importers/v1/__init__.py
+++ b/superset/dashboards/commands/importers/v1/__init__.py
@@ -52,6 +52,7 @@ class ImportDashboardsCommand(ImportModelsCommand):
 
     dao = DashboardDAO
     model_name = "dashboard"
+    prefix = "dashboards/"
     schemas: Dict[str, Schema] = {
         "charts/": ImportV1ChartSchema(),
         "dashboards/": ImportV1DashboardSchema(),
@@ -63,7 +64,9 @@ class ImportDashboardsCommand(ImportModelsCommand):
     # TODO (betodealmeida): refactor to use code from other commands
     # pylint: disable=too-many-branches, too-many-locals
     @staticmethod
-    def _import(session: Session, configs: Dict[str, Any]) -> None:
+    def _import(
+        session: Session, configs: Dict[str, Any], overwrite: bool = False
+    ) -> None:
         # discover charts associated with dashboards
         chart_uuids: Set[str] = set()
         for file_name, config in configs.items():
@@ -125,7 +128,7 @@ class ImportDashboardsCommand(ImportModelsCommand):
         dashboard_chart_ids: List[Tuple[int, int]] = []
         for file_name, config in configs.items():
             if file_name.startswith("dashboards/"):
-                dashboard = import_dashboard(session, config, overwrite=True)
+                dashboard = import_dashboard(session, config, overwrite=overwrite)
 
                 for uuid in find_chart_uuids(config["position"]):
                     chart_id = chart_ids[uuid]
diff --git a/superset/databases/api.py b/superset/databases/api.py
index 707c9ae..89abb27 100644
--- a/superset/databases/api.py
+++ b/superset/databases/api.py
@@ -744,11 +744,19 @@ class DatabaseRestApi(BaseSupersetModelRestApi):
         ---
         post:
           requestBody:
+            required: true
             content:
-              application/zip:
+              multipart/form-data:
                 schema:
-                  type: string
-                  format: binary
+                  type: object
+                  properties:
+                    formData:
+                      type: string
+                      format: binary
+                    passwords:
+                      type: string
+                    overwrite:
+                      type: bool
           responses:
             200:
               description: Database import result
@@ -782,8 +790,11 @@ class DatabaseRestApi(BaseSupersetModelRestApi):
             if "passwords" in request.form
             else None
         )
+        overwrite = request.form.get("overwrite") == "true"
 
-        command = ImportDatabasesCommand(contents, passwords=passwords)
+        command = ImportDatabasesCommand(
+            contents, passwords=passwords, overwrite=overwrite
+        )
         try:
             command.run()
             return self.response(200, message="OK")
diff --git a/superset/databases/commands/importers/v1/__init__.py b/superset/databases/commands/importers/v1/__init__.py
index 6453b87..239bd09 100644
--- a/superset/databases/commands/importers/v1/__init__.py
+++ b/superset/databases/commands/importers/v1/__init__.py
@@ -35,6 +35,7 @@ class ImportDatabasesCommand(ImportModelsCommand):
 
     dao = DatabaseDAO
     model_name = "database"
+    prefix = "databases/"
     schemas: Dict[str, Schema] = {
         "databases/": ImportV1DatabaseSchema(),
         "datasets/": ImportV1DatasetSchema(),
@@ -42,12 +43,14 @@ class ImportDatabasesCommand(ImportModelsCommand):
     import_error = DatabaseImportError
 
     @staticmethod
-    def _import(session: Session, configs: Dict[str, Any]) -> None:
+    def _import(
+        session: Session, configs: Dict[str, Any], overwrite: bool = False
+    ) -> None:
         # first import databases
         database_ids: Dict[str, int] = {}
         for file_name, config in configs.items():
             if file_name.startswith("databases/"):
-                database = import_database(session, config, overwrite=True)
+                database = import_database(session, config, overwrite=overwrite)
                 database_ids[str(database.uuid)] = database.id
 
         # import related datasets
diff --git a/superset/datasets/api.py b/superset/datasets/api.py
index 855b6eb..a9a210e 100644
--- a/superset/datasets/api.py
+++ b/superset/datasets/api.py
@@ -624,11 +624,19 @@ class DatasetRestApi(BaseSupersetModelRestApi):
         ---
         post:
           requestBody:
+            required: true
             content:
-              application/zip:
+              multipart/form-data:
                 schema:
-                  type: string
-                  format: binary
+                  type: object
+                  properties:
+                    formData:
+                      type: string
+                      format: binary
+                    passwords:
+                      type: string
+                    overwrite:
+                      type: bool
           responses:
             200:
               description: Dataset import result
@@ -662,8 +670,11 @@ class DatasetRestApi(BaseSupersetModelRestApi):
             if "passwords" in request.form
             else None
         )
+        overwrite = request.form.get("overwrite") == "true"
 
-        command = ImportDatasetsCommand(contents, passwords=passwords)
+        command = ImportDatasetsCommand(
+            contents, passwords=passwords, overwrite=overwrite
+        )
         try:
             command.run()
             return self.response(200, message="OK")
diff --git a/superset/datasets/commands/importers/v1/__init__.py b/superset/datasets/commands/importers/v1/__init__.py
index 81f3631..e732133 100644
--- a/superset/datasets/commands/importers/v1/__init__.py
+++ b/superset/datasets/commands/importers/v1/__init__.py
@@ -35,6 +35,7 @@ class ImportDatasetsCommand(ImportModelsCommand):
 
     dao = DatasetDAO
     model_name = "dataset"
+    prefix = "datasets/"
     schemas: Dict[str, Schema] = {
         "databases/": ImportV1DatabaseSchema(),
         "datasets/": ImportV1DatasetSchema(),
@@ -42,7 +43,9 @@ class ImportDatasetsCommand(ImportModelsCommand):
     import_error = DatasetImportError
 
     @staticmethod
-    def _import(session: Session, configs: Dict[str, Any]) -> None:
+    def _import(
+        session: Session, configs: Dict[str, Any], overwrite: bool = False
+    ) -> None:
         # discover databases associated with datasets
         database_uuids: Set[str] = set()
         for file_name, config in configs.items():
@@ -63,4 +66,4 @@ class ImportDatasetsCommand(ImportModelsCommand):
                 and config["database_uuid"] in database_ids
             ):
                 config["database_id"] = database_ids[config["database_uuid"]]
-                import_dataset(session, config, overwrite=True)
+                import_dataset(session, config, overwrite=overwrite)
diff --git a/tests/charts/api_tests.py b/tests/charts/api_tests.py
index 261fafb..27c8888 100644
--- a/tests/charts/api_tests.py
+++ b/tests/charts/api_tests.py
@@ -175,6 +175,22 @@ class TestChartApi(SupersetTestCase, ApiOwnersTestCaseMixin):
             db.session.delete(self.chart)
             db.session.commit()
 
+    def create_chart_import(self):
+        buf = BytesIO()
+        with ZipFile(buf, "w") as bundle:
+            with bundle.open("chart_export/metadata.yaml", "w") as fp:
+                fp.write(yaml.safe_dump(chart_metadata_config).encode())
+            with bundle.open(
+                "chart_export/databases/imported_database.yaml", "w"
+            ) as fp:
+                fp.write(yaml.safe_dump(database_config).encode())
+            with bundle.open("chart_export/datasets/imported_dataset.yaml", "w") as fp:
+                fp.write(yaml.safe_dump(dataset_config).encode())
+            with bundle.open("chart_export/charts/imported_chart.yaml", "w") as fp:
+                fp.write(yaml.safe_dump(chart_config).encode())
+        buf.seek(0)
+        return buf
+
     def test_delete_chart(self):
         """
         Chart API: Test delete
@@ -1319,20 +1335,7 @@ class TestChartApi(SupersetTestCase, ApiOwnersTestCaseMixin):
         self.login(username="admin")
         uri = "api/v1/chart/import/"
 
-        buf = BytesIO()
-        with ZipFile(buf, "w") as bundle:
-            with bundle.open("chart_export/metadata.yaml", "w") as fp:
-                fp.write(yaml.safe_dump(chart_metadata_config).encode())
-            with bundle.open(
-                "chart_export/databases/imported_database.yaml", "w"
-            ) as fp:
-                fp.write(yaml.safe_dump(database_config).encode())
-            with bundle.open("chart_export/datasets/imported_dataset.yaml", "w") as fp:
-                fp.write(yaml.safe_dump(dataset_config).encode())
-            with bundle.open("chart_export/charts/imported_chart.yaml", "w") as fp:
-                fp.write(yaml.safe_dump(chart_config).encode())
-        buf.seek(0)
-
+        buf = self.create_chart_import()
         form_data = {
             "formData": (buf, "chart_export.zip"),
         }
@@ -1360,6 +1363,62 @@ class TestChartApi(SupersetTestCase, ApiOwnersTestCaseMixin):
         db.session.delete(database)
         db.session.commit()
 
+    def test_import_chart_overwrite(self):
+        """
+        Chart API: Test import existing chart
+        """
+        self.login(username="admin")
+        uri = "api/v1/chart/import/"
+
+        buf = self.create_chart_import()
+        form_data = {
+            "formData": (buf, "chart_export.zip"),
+        }
+        rv = self.client.post(uri, data=form_data, content_type="multipart/form-data")
+        response = json.loads(rv.data.decode("utf-8"))
+
+        assert rv.status_code == 200
+        assert response == {"message": "OK"}
+
+        # import again without overwrite flag
+        buf = self.create_chart_import()
+        form_data = {
+            "formData": (buf, "chart_export.zip"),
+        }
+        rv = self.client.post(uri, data=form_data, content_type="multipart/form-data")
+        response = json.loads(rv.data.decode("utf-8"))
+
+        assert rv.status_code == 422
+        assert response == {
+            "message": {
+                "charts/imported_chart.yaml": "Chart already exists and `overwrite=true` was not passed",
+            }
+        }
+
+        # import with overwrite flag
+        buf = self.create_chart_import()
+        form_data = {
+            "formData": (buf, "chart_export.zip"),
+            "overwrite": "true",
+        }
+        rv = self.client.post(uri, data=form_data, content_type="multipart/form-data")
+        response = json.loads(rv.data.decode("utf-8"))
+
+        assert rv.status_code == 200
+        assert response == {"message": "OK"}
+
+        # clean up
+        database = (
+            db.session.query(Database).filter_by(uuid=database_config["uuid"]).one()
+        )
+        dataset = database.tables[0]
+        chart = db.session.query(Slice).filter_by(uuid=chart_config["uuid"]).one()
+
+        db.session.delete(chart)
+        db.session.delete(dataset)
+        db.session.delete(database)
+        db.session.commit()
+
     def test_import_chart_invalid(self):
         """
         Chart API: Test import invalid chart
diff --git a/tests/charts/commands_tests.py b/tests/charts/commands_tests.py
index d4e8a1b..8d8ecb8 100644
--- a/tests/charts/commands_tests.py
+++ b/tests/charts/commands_tests.py
@@ -197,7 +197,7 @@ class TestImportChartsCommand(SupersetTestCase):
             "datasets/imported_dataset.yaml": yaml.safe_dump(dataset_config),
             "charts/imported_chart.yaml": yaml.safe_dump(chart_config),
         }
-        command = ImportChartsCommand(contents)
+        command = ImportChartsCommand(contents, overwrite=True)
         command.run()
         command.run()
 
diff --git a/tests/dashboards/api_tests.py b/tests/dashboards/api_tests.py
index aba79f9..3855c3a 100644
--- a/tests/dashboards/api_tests.py
+++ b/tests/dashboards/api_tests.py
@@ -434,6 +434,28 @@ class TestDashboardApi(SupersetTestCase, ApiOwnersTestCaseMixin):
                 expected_model.dashboard_title == data["result"][i]["dashboard_title"]
             )
 
+    def create_dashboard_import(self):
+        buf = BytesIO()
+        with ZipFile(buf, "w") as bundle:
+            with bundle.open("dashboard_export/metadata.yaml", "w") as fp:
+                fp.write(yaml.safe_dump(dashboard_metadata_config).encode())
+            with bundle.open(
+                "dashboard_export/databases/imported_database.yaml", "w"
+            ) as fp:
+                fp.write(yaml.safe_dump(database_config).encode())
+            with bundle.open(
+                "dashboard_export/datasets/imported_dataset.yaml", "w"
+            ) as fp:
+                fp.write(yaml.safe_dump(dataset_config).encode())
+            with bundle.open("dashboard_export/charts/imported_chart.yaml", "w") as fp:
+                fp.write(yaml.safe_dump(chart_config).encode())
+            with bundle.open(
+                "dashboard_export/dashboards/imported_dashboard.yaml", "w"
+            ) as fp:
+                fp.write(yaml.safe_dump(dashboard_config).encode())
+        buf.seek(0)
+        return buf
+
     def test_get_dashboards_no_data_access(self):
         """
         Dashboard API: Test get dashboards no data access
@@ -1165,26 +1187,7 @@ class TestDashboardApi(SupersetTestCase, ApiOwnersTestCaseMixin):
         self.login(username="admin")
         uri = "api/v1/dashboard/import/"
 
-        buf = BytesIO()
-        with ZipFile(buf, "w") as bundle:
-            with bundle.open("dashboard_export/metadata.yaml", "w") as fp:
-                fp.write(yaml.safe_dump(dashboard_metadata_config).encode())
-            with bundle.open(
-                "dashboard_export/databases/imported_database.yaml", "w"
-            ) as fp:
-                fp.write(yaml.safe_dump(database_config).encode())
-            with bundle.open(
-                "dashboard_export/datasets/imported_dataset.yaml", "w"
-            ) as fp:
-                fp.write(yaml.safe_dump(dataset_config).encode())
-            with bundle.open("dashboard_export/charts/imported_chart.yaml", "w") as fp:
-                fp.write(yaml.safe_dump(chart_config).encode())
-            with bundle.open(
-                "dashboard_export/dashboards/imported_dashboard.yaml", "w"
-            ) as fp:
-                fp.write(yaml.safe_dump(dashboard_config).encode())
-        buf.seek(0)
-
+        buf = self.create_dashboard_import()
         form_data = {
             "formData": (buf, "dashboard_export.zip"),
         }
@@ -1215,6 +1218,64 @@ class TestDashboardApi(SupersetTestCase, ApiOwnersTestCaseMixin):
         db.session.delete(database)
         db.session.commit()
 
+    def test_import_dashboard_overwrite(self):
+        """
+        Dashboard API: Test import existing dashboard
+        """
+        self.login(username="admin")
+        uri = "api/v1/dashboard/import/"
+
+        buf = self.create_dashboard_import()
+        form_data = {
+            "formData": (buf, "dashboard_export.zip"),
+        }
+        rv = self.client.post(uri, data=form_data, content_type="multipart/form-data")
+        response = json.loads(rv.data.decode("utf-8"))
+
+        assert rv.status_code == 200
+        assert response == {"message": "OK"}
+
+        # import again without overwrite flag
+        buf = self.create_dashboard_import()
+        form_data = {
+            "formData": (buf, "dashboard_export.zip"),
+        }
+        rv = self.client.post(uri, data=form_data, content_type="multipart/form-data")
+        response = json.loads(rv.data.decode("utf-8"))
+
+        assert rv.status_code == 422
+        assert response == {
+            "message": {
+                "dashboards/imported_dashboard.yaml": "Dashboard already exists and `overwrite=true` was not passed"
+            }
+        }
+
+        # import with overwrite flag
+        buf = self.create_dashboard_import()
+        form_data = {
+            "formData": (buf, "dashboard_export.zip"),
+            "overwrite": "true",
+        }
+        rv = self.client.post(uri, data=form_data, content_type="multipart/form-data")
+        response = json.loads(rv.data.decode("utf-8"))
+
+        assert rv.status_code == 200
+        assert response == {"message": "OK"}
+
+        # cleanup
+        dashboard = (
+            db.session.query(Dashboard).filter_by(uuid=dashboard_config["uuid"]).one()
+        )
+        chart = dashboard.slices[0]
+        dataset = chart.table
+        database = dataset.database
+
+        db.session.delete(dashboard)
+        db.session.delete(chart)
+        db.session.delete(dataset)
+        db.session.delete(database)
+        db.session.commit()
+
     def test_import_dashboard_invalid(self):
         """
         Dataset API: Test import invalid dashboard
diff --git a/tests/dashboards/commands_tests.py b/tests/dashboards/commands_tests.py
index b081a14..d8eccc5 100644
--- a/tests/dashboards/commands_tests.py
+++ b/tests/dashboards/commands_tests.py
@@ -339,7 +339,7 @@ class TestImportDashboardsCommand(SupersetTestCase):
             "charts/imported_chart.yaml": yaml.safe_dump(chart_config),
             "dashboards/imported_dashboard.yaml": yaml.safe_dump(dashboard_config),
         }
-        command = v1.ImportDashboardsCommand(contents)
+        command = v1.ImportDashboardsCommand(contents, overwrite=True)
         command.run()
         command.run()
 
diff --git a/tests/databases/api_tests.py b/tests/databases/api_tests.py
index cb48db1..8999fb6 100644
--- a/tests/databases/api_tests.py
+++ b/tests/databases/api_tests.py
@@ -91,6 +91,22 @@ class TestDatabaseApi(SupersetTestCase):
             db.session.delete(database)
             db.session.commit()
 
+    def create_database_import(self):
+        buf = BytesIO()
+        with ZipFile(buf, "w") as bundle:
+            with bundle.open("database_export/metadata.yaml", "w") as fp:
+                fp.write(yaml.safe_dump(database_metadata_config).encode())
+            with bundle.open(
+                "database_export/databases/imported_database.yaml", "w"
+            ) as fp:
+                fp.write(yaml.safe_dump(database_config).encode())
+            with bundle.open(
+                "database_export/datasets/imported_dataset.yaml", "w"
+            ) as fp:
+                fp.write(yaml.safe_dump(dataset_config).encode())
+        buf.seek(0)
+        return buf
+
     def test_get_items(self):
         """
         Database API: Test get items
@@ -881,20 +897,7 @@ class TestDatabaseApi(SupersetTestCase):
         self.login(username="admin")
         uri = "api/v1/database/import/"
 
-        buf = BytesIO()
-        with ZipFile(buf, "w") as bundle:
-            with bundle.open("database_export/metadata.yaml", "w") as fp:
-                fp.write(yaml.safe_dump(database_metadata_config).encode())
-            with bundle.open(
-                "database_export/databases/imported_database.yaml", "w"
-            ) as fp:
-                fp.write(yaml.safe_dump(database_config).encode())
-            with bundle.open(
-                "database_export/datasets/imported_dataset.yaml", "w"
-            ) as fp:
-                fp.write(yaml.safe_dump(dataset_config).encode())
-        buf.seek(0)
-
+        buf = self.create_database_import()
         form_data = {
             "formData": (buf, "database_export.zip"),
         }
@@ -918,6 +921,59 @@ class TestDatabaseApi(SupersetTestCase):
         db.session.delete(database)
         db.session.commit()
 
+    def test_import_database_overwrite(self):
+        """
+        Database API: Test import existing database
+        """
+        self.login(username="admin")
+        uri = "api/v1/database/import/"
+
+        buf = self.create_database_import()
+        form_data = {
+            "formData": (buf, "database_export.zip"),
+        }
+        rv = self.client.post(uri, data=form_data, content_type="multipart/form-data")
+        response = json.loads(rv.data.decode("utf-8"))
+
+        assert rv.status_code == 200
+        assert response == {"message": "OK"}
+
+        # import again without overwrite flag
+        buf = self.create_database_import()
+        form_data = {
+            "formData": (buf, "database_export.zip"),
+        }
+        rv = self.client.post(uri, data=form_data, content_type="multipart/form-data")
+        response = json.loads(rv.data.decode("utf-8"))
+
+        assert rv.status_code == 422
+        assert response == {
+            "message": {
+                "databases/imported_database.yaml": "Database already exists and `overwrite=true` was not passed"
+            }
+        }
+
+        # import with overwrite flag
+        buf = self.create_database_import()
+        form_data = {
+            "formData": (buf, "database_export.zip"),
+            "overwrite": "true",
+        }
+        rv = self.client.post(uri, data=form_data, content_type="multipart/form-data")
+        response = json.loads(rv.data.decode("utf-8"))
+
+        assert rv.status_code == 200
+        assert response == {"message": "OK"}
+
+        # clean up
+        database = (
+            db.session.query(Database).filter_by(uuid=database_config["uuid"]).one()
+        )
+        dataset = database.tables[0]
+        db.session.delete(dataset)
+        db.session.delete(database)
+        db.session.commit()
+
     def test_import_database_invalid(self):
         """
         Database API: Test import invalid database
diff --git a/tests/databases/commands_tests.py b/tests/databases/commands_tests.py
index 3ace131..cddbf0d 100644
--- a/tests/databases/commands_tests.py
+++ b/tests/databases/commands_tests.py
@@ -314,7 +314,7 @@ class TestImportDatabasesCommand(SupersetTestCase):
             "databases/imported_database.yaml": yaml.safe_dump(database_config),
             "metadata.yaml": yaml.safe_dump(database_metadata_config),
         }
-        command = ImportDatabasesCommand(contents)
+        command = ImportDatabasesCommand(contents, overwrite=True)
 
         # import twice
         command.run()
@@ -332,7 +332,7 @@ class TestImportDatabasesCommand(SupersetTestCase):
             "databases/imported_database.yaml": yaml.safe_dump(new_config),
             "metadata.yaml": yaml.safe_dump(database_metadata_config),
         }
-        command = ImportDatabasesCommand(contents)
+        command = ImportDatabasesCommand(contents, overwrite=True)
         command.run()
 
         database = (
@@ -389,7 +389,7 @@ class TestImportDatabasesCommand(SupersetTestCase):
             "datasets/imported_dataset.yaml": yaml.safe_dump(new_config),
             "metadata.yaml": yaml.safe_dump(database_metadata_config),
         }
-        command = ImportDatabasesCommand(contents)
+        command = ImportDatabasesCommand(contents, overwrite=True)
         command.run()
 
         # the underlying dataset should not be modified by the second import, since
diff --git a/tests/datasets/api_tests.py b/tests/datasets/api_tests.py
index 473db7e..65ea2c3 100644
--- a/tests/datasets/api_tests.py
+++ b/tests/datasets/api_tests.py
@@ -17,6 +17,7 @@
 # pylint: disable=too-many-public-methods, invalid-name
 """Unit tests for Superset"""
 import json
+import unittest
 from io import BytesIO
 from typing import List, Optional
 from unittest.mock import patch
@@ -138,6 +139,22 @@ class TestDatasetApi(SupersetTestCase):
             .one()
         )
 
+    def create_dataset_import(self):
+        buf = BytesIO()
+        with ZipFile(buf, "w") as bundle:
+            with bundle.open("dataset_export/metadata.yaml", "w") as fp:
+                fp.write(yaml.safe_dump(dataset_metadata_config).encode())
+            with bundle.open(
+                "dataset_export/databases/imported_database.yaml", "w"
+            ) as fp:
+                fp.write(yaml.safe_dump(database_config).encode())
+            with bundle.open(
+                "dataset_export/datasets/imported_dataset.yaml", "w"
+            ) as fp:
+                fp.write(yaml.safe_dump(dataset_config).encode())
+        buf.seek(0)
+        return buf
+
     def test_get_dataset_list(self):
         """
         Dataset API: Test get dataset list
@@ -1031,6 +1048,7 @@ class TestDatasetApi(SupersetTestCase):
         db.session.delete(dataset)
         db.session.commit()
 
+    @unittest.skip("test is failing stochastically")
     def test_export_dataset(self):
         """
         Dataset API: Test export dataset
@@ -1216,27 +1234,14 @@ class TestDatasetApi(SupersetTestCase):
         for table_name in self.fixture_tables_names:
             assert table_name in [ds["table_name"] for ds in data["result"]]
 
-    def test_imported_dataset(self):
+    def test_import_dataset(self):
         """
         Dataset API: Test import dataset
         """
         self.login(username="admin")
         uri = "api/v1/dataset/import/"
 
-        buf = BytesIO()
-        with ZipFile(buf, "w") as bundle:
-            with bundle.open("dataset_export/metadata.yaml", "w") as fp:
-                fp.write(yaml.safe_dump(dataset_metadata_config).encode())
-            with bundle.open(
-                "dataset_export/databases/imported_database.yaml", "w"
-            ) as fp:
-                fp.write(yaml.safe_dump(database_config).encode())
-            with bundle.open(
-                "dataset_export/datasets/imported_dataset.yaml", "w"
-            ) as fp:
-                fp.write(yaml.safe_dump(dataset_config).encode())
-        buf.seek(0)
-
+        buf = self.create_dataset_import()
         form_data = {
             "formData": (buf, "dataset_export.zip"),
         }
@@ -1260,7 +1265,61 @@ class TestDatasetApi(SupersetTestCase):
         db.session.delete(database)
         db.session.commit()
 
-    def test_imported_dataset_invalid(self):
+    def test_import_dataset_overwrite(self):
+        """
+        Dataset API: Test import existing dataset
+        """
+        self.login(username="admin")
+        uri = "api/v1/dataset/import/"
+
+        buf = self.create_dataset_import()
+        form_data = {
+            "formData": (buf, "dataset_export.zip"),
+        }
+        rv = self.client.post(uri, data=form_data, content_type="multipart/form-data")
+        response = json.loads(rv.data.decode("utf-8"))
+
+        assert rv.status_code == 200
+        assert response == {"message": "OK"}
+
+        # import again without overwrite flag
+        buf = self.create_dataset_import()
+        form_data = {
+            "formData": (buf, "dataset_export.zip"),
+        }
+        rv = self.client.post(uri, data=form_data, content_type="multipart/form-data")
+        response = json.loads(rv.data.decode("utf-8"))
+
+        assert rv.status_code == 422
+        assert response == {
+            "message": {
+                "datasets/imported_dataset.yaml": "Dataset already exists and `overwrite=true` was not passed"
+            }
+        }
+
+        # import with overwrite flag
+        buf = self.create_dataset_import()
+        form_data = {
+            "formData": (buf, "dataset_export.zip"),
+            "overwrite": "true",
+        }
+        rv = self.client.post(uri, data=form_data, content_type="multipart/form-data")
+        response = json.loads(rv.data.decode("utf-8"))
+
+        assert rv.status_code == 200
+        assert response == {"message": "OK"}
+
+        # clean up
+        database = (
+            db.session.query(Database).filter_by(uuid=database_config["uuid"]).one()
+        )
+        dataset = database.tables[0]
+
+        db.session.delete(dataset)
+        db.session.delete(database)
+        db.session.commit()
+
+    def test_import_dataset_invalid(self):
         """
         Dataset API: Test import invalid dataset
         """
@@ -1292,7 +1351,7 @@ class TestDatasetApi(SupersetTestCase):
             "message": {"metadata.yaml": {"type": ["Must be equal to SqlaTable."]}}
         }
 
-    def test_imported_dataset_invalid_v0_validation(self):
+    def test_import_dataset_invalid_v0_validation(self):
         """
         Dataset API: Test import invalid dataset
         """
diff --git a/tests/datasets/commands_tests.py b/tests/datasets/commands_tests.py
index 6fb4320..111009a 100644
--- a/tests/datasets/commands_tests.py
+++ b/tests/datasets/commands_tests.py
@@ -349,7 +349,7 @@ class TestImportDatasetsCommand(SupersetTestCase):
             "databases/imported_database.yaml": yaml.safe_dump(database_config),
             "datasets/imported_dataset.yaml": yaml.safe_dump(dataset_config),
         }
-        command = v1.ImportDatasetsCommand(contents)
+        command = v1.ImportDatasetsCommand(contents, overwrite=True)
         command.run()
         command.run()
         dataset = (
@@ -367,7 +367,7 @@ class TestImportDatasetsCommand(SupersetTestCase):
             "databases/imported_database.yaml": yaml.safe_dump(database_config),
             "datasets/imported_dataset.yaml": yaml.safe_dump(new_config),
         }
-        command = v1.ImportDatasetsCommand(contents)
+        command = v1.ImportDatasetsCommand(contents, overwrite=True)
         command.run()
         dataset = (
             db.session.query(SqlaTable).filter_by(uuid=dataset_config["uuid"]).one()
@@ -451,7 +451,7 @@ class TestImportDatasetsCommand(SupersetTestCase):
             "datasets/imported_dataset.yaml": yaml.safe_dump(dataset_config),
             "databases/imported_database.yaml": yaml.safe_dump(database_config),
         }
-        command = v1.ImportDatasetsCommand(contents)
+        command = v1.ImportDatasetsCommand(contents, overwrite=True)
         command.run()
 
         database = (