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93 lines
3.1 KiB
Python
93 lines
3.1 KiB
Python
# Licensed to the Apache Software Foundation (ASF) under one
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# or more contributor license agreements. See the NOTICE file
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# distributed with this work for additional information
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# regarding copyright ownership. The ASF licenses this file
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# to you under the Apache License, Version 2.0 (the
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# "License"); you may not use this file except in compliance
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# with the License. You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing,
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# software distributed under the License is distributed on an
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# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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# KIND, either express or implied. See the License for the
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# specific language governing permissions and limitations
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# under the License.
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# pylint: disable=C,R,W
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import logging
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from sqlalchemy.orm.session import make_transient
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def import_datasource(
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session,
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i_datasource,
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lookup_database,
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lookup_datasource,
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import_time):
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"""Imports the datasource from the object to the database.
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Metrics and columns and datasource will be overrided if exists.
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This function can be used to import/export dashboards between multiple
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superset instances. Audit metadata isn't copies over.
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"""
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make_transient(i_datasource)
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logging.info('Started import of the datasource: {}'.format(
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i_datasource.to_json()))
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i_datasource.id = None
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i_datasource.database_id = lookup_database(i_datasource).id
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i_datasource.alter_params(import_time=import_time)
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# override the datasource
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datasource = lookup_datasource(i_datasource)
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if datasource:
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datasource.override(i_datasource)
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session.flush()
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else:
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datasource = i_datasource.copy()
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session.add(datasource)
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session.flush()
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for m in i_datasource.metrics:
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new_m = m.copy()
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new_m.table_id = datasource.id
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logging.info('Importing metric {} from the datasource: {}'.format(
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new_m.to_json(), i_datasource.full_name))
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imported_m = i_datasource.metric_class.import_obj(new_m)
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if (imported_m.metric_name not in
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[m.metric_name for m in datasource.metrics]):
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datasource.metrics.append(imported_m)
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for c in i_datasource.columns:
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new_c = c.copy()
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new_c.table_id = datasource.id
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logging.info('Importing column {} from the datasource: {}'.format(
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new_c.to_json(), i_datasource.full_name))
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imported_c = i_datasource.column_class.import_obj(new_c)
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if (imported_c.column_name not in
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[c.column_name for c in datasource.columns]):
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datasource.columns.append(imported_c)
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session.flush()
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return datasource.id
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def import_simple_obj(session, i_obj, lookup_obj):
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make_transient(i_obj)
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i_obj.id = None
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i_obj.table = None
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# find if the column was already imported
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existing_column = lookup_obj(i_obj)
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i_obj.table = None
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if existing_column:
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existing_column.override(i_obj)
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session.flush()
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return existing_column
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session.add(i_obj)
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session.flush()
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return i_obj
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