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121 lines
4.5 KiB
Python
121 lines
4.5 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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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.orm.exc import NoResultFound
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from superset import 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 superset.typing import FlaskResponse
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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) -> FlaskResponse:
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data = request.form.get("data")
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if not isinstance(data, str):
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return json_error_response("Request missing data field.", status=500)
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datasource_dict = json.loads(data)
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datasource_id = datasource_dict.get("id")
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datasource_type = datasource_dict.get("type")
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database_id = datasource_dict["database"].get("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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orm_datasource.database_id = database_id
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if "owners" in datasource_dict and orm_datasource.owner_class is not None:
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datasource_dict["owners"] = (
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db.session.query(orm_datasource.owner_class)
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.filter(orm_datasource.owner_class.id.in_(datasource_dict["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_dict["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_dict)
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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: str, datasource_id: int) -> FlaskResponse:
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try:
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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.data:
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return json_error_response(
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"Error fetching datasource data.", status=500
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)
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return self.json_response(orm_datasource.data)
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except NoResultFound:
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return json_error_response("This datasource does not exist", status=400)
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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(
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self, datasource_type: str, datasource_id: int
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) -> FlaskResponse:
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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_class = ConnectorRegistry.sources["table"]
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datasource = table_class(
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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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else:
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raise Exception(f"Unsupported datasource_type: {datasource_type}")
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external_metadata = datasource.external_metadata()
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return self.json_response(external_metadata)
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