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a94464b9c9
* catch IntegrityError in datasource save * catch duplicate columns and wrap in exception handling decorators * use 409 * isort
114 lines
4.0 KiB
Python
114 lines
4.0 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 json
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from collections import Counter
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from flask import request
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from flask_appbuilder import expose
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from flask_appbuilder.security.decorators import has_access_api
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from sqlalchemy.exc import IntegrityError
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from superset import appbuilder, db
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from superset.connectors.connector_registry import ConnectorRegistry
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from superset.models.core import Database
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from .base import api, BaseSupersetView, handle_api_exception, json_error_response
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class Datasource(BaseSupersetView):
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"""Datasource-related views"""
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@expose("/save/", methods=["POST"])
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@has_access_api
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@api
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@handle_api_exception
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def save(self):
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datasource = json.loads(request.form.get("data"))
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datasource_id = datasource.get("id")
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datasource_type = datasource.get("type")
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orm_datasource = ConnectorRegistry.get_datasource(
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datasource_type, datasource_id, db.session
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)
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if "owners" in datasource:
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datasource["owners"] = (
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db.session.query(orm_datasource.owner_class)
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.filter(orm_datasource.owner_class.id.in_(datasource["owners"]))
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.all()
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)
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duplicates = [
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name
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for name, count in Counter(
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[col["column_name"] for col in datasource["columns"]]
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).items()
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if count > 1
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]
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if duplicates:
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return json_error_response(
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f"Duplicate column name(s): {','.join(duplicates)}", status="409"
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)
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orm_datasource.update_from_object(datasource)
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data = orm_datasource.data
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db.session.commit()
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return self.json_response(data)
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@expose("/get/<datasource_type>/<datasource_id>/")
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@has_access_api
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@api
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@handle_api_exception
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def get(self, datasource_type, datasource_id):
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orm_datasource = ConnectorRegistry.get_datasource(
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datasource_type, datasource_id, db.session
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)
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if not orm_datasource:
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return json_error_response("This datasource does not exist", status="400")
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elif not orm_datasource.data:
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return json_error_response("Error fetching datasource data.", status="500")
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return self.json_response(orm_datasource.data)
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@expose("/external_metadata/<datasource_type>/<datasource_id>/")
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@has_access_api
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@api
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@handle_api_exception
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def external_metadata(self, datasource_type=None, datasource_id=None):
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"""Gets column info from the source system"""
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if datasource_type == "druid":
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datasource = ConnectorRegistry.get_datasource(
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datasource_type, datasource_id, db.session
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)
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elif datasource_type == "table":
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database = (
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db.session.query(Database).filter_by(id=request.args.get("db_id")).one()
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)
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Table = ConnectorRegistry.sources["table"]
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datasource = Table(
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database=database,
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table_name=request.args.get("table_name"),
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schema=request.args.get("schema") or None,
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)
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external_metadata = datasource.external_metadata()
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return self.json_response(external_metadata)
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appbuilder.add_view_no_menu(Datasource)
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