superset base_api 源码
superset base_api 代码
文件路径：/superset/views/base_api.py
# Licensed to the Apache Software Foundation (ASF) under one
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# distributed with this work for additional information
# regarding copyright ownership. The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied. See the License for the
# specific language governing permissions and limitations
# under the License.
import functools
import logging
from typing import Any, Callable, cast, Dict, List, Optional, Set, Tuple, Type, Union
from flask import Blueprint, request, Response
from flask_appbuilder import AppBuilder, Model, ModelRestApi
from flask_appbuilder.api import expose, protect, rison, safe
from flask_appbuilder.models.filters import BaseFilter, Filters
from flask_appbuilder.models.sqla.filters import FilterStartsWith
from flask_appbuilder.models.sqla.interface import SQLAInterface
from flask_babel import lazy_gettext as _
from marshmallow import fields, Schema
from sqlalchemy import and_, distinct, func
from sqlalchemy.orm.query import Query
from superset.exceptions import InvalidPayloadFormatError
from superset.extensions import db, event_logger, security_manager
from superset.models.core import FavStar
from superset.models.dashboard import Dashboard
from superset.models.slice import Slice
from superset.schemas import error_payload_content
from superset.sql_lab import Query as SqllabQuery
from superset.stats_logger import BaseStatsLogger
from superset.superset_typing import FlaskResponse
from superset.utils.core import get_user_id, time_function
from superset.views.base import handle_api_exception
logger = logging.getLogger(__name__)
get_related_schema = {
"type": "object",
"properties": {
"page_size": {"type": "integer"},
"page": {"type": "integer"},
"include_ids": {"type": "array", "items": {"type": "integer"}},
"filter": {"type": "string"},
},
}
class RelatedResultResponseSchema(Schema):
value = fields.Integer(description="The related item identifier")
text = fields.String(description="The related item string representation")
extra = fields.Dict(description="The extra metadata for related item")
class RelatedResponseSchema(Schema):
count = fields.Integer(description="The total number of related values")
result = fields.List(fields.Nested(RelatedResultResponseSchema))
class DistinctResultResponseSchema(Schema):
text = fields.String(description="The distinct item")
class DistincResponseSchema(Schema):
count = fields.Integer(description="The total number of distinct values")
result = fields.List(fields.Nested(DistinctResultResponseSchema))
def requires_json(f: Callable[..., Any]) -> Callable[..., Any]:
"""
Require JSON-like formatted request to the REST API
"""
def wraps(self: "BaseSupersetModelRestApi", *args: Any, **kwargs: Any) -> Response:
if not request.is_json:
raise InvalidPayloadFormatError(message="Request is not JSON")
return f(self, *args, **kwargs)
return functools.update_wrapper(wraps, f)
def requires_form_data(f: Callable[..., Any]) -> Callable[..., Any]:
"""
Require 'multipart/form-data' as request MIME type
"""
def wraps(self: "BaseSupersetModelRestApi", *args: Any, **kwargs: Any) -> Response:
if not request.mimetype == "multipart/form-data":
raise InvalidPayloadFormatError(
message="Request MIME type is not 'multipart/form-data'"
)
return f(self, *args, **kwargs)
return functools.update_wrapper(wraps, f)
def statsd_metrics(f: Callable[..., Any]) -> Callable[..., Any]:
"""
Handle sending all statsd metrics from the REST API
"""
def wraps(self: "BaseSupersetModelRestApi", *args: Any, **kwargs: Any) -> Response:
try:
duration, response = time_function(f, self, *args, **kwargs)
except Exception as ex:
self.incr_stats("error", f.__name__)
raise ex
self.send_stats_metrics(response, f.__name__, duration)
return response
return functools.update_wrapper(wraps, f)
class RelatedFieldFilter:
# data class to specify what filter to use on a /related endpoint
# pylint: disable=too-few-public-methods
def __init__(self, field_name: str, filter_class: Type[BaseFilter]):
self.field_name = field_name
self.filter_class = filter_class
class BaseFavoriteFilter(BaseFilter): # pylint: disable=too-few-public-methods
"""
Base Custom filter for the GET list that filters all dashboards, slices
that a user has favored or not
"""
name = _("Is favorite")
arg_name = ""
class_name = ""
""" The FavStar class_name to user """
model: Type[Union[Dashboard, Slice, SqllabQuery]] = Dashboard
""" The SQLAlchemy model """
def apply(self, query: Query, value: Any) -> Query:
# If anonymous user filter nothing
if security_manager.current_user is None:
return query
users_favorite_query = db.session.query(FavStar.obj_id).filter(
and_(
FavStar.user_id == get_user_id(),
FavStar.class_name == self.class_name,
)
)
if value:
return query.filter(and_(self.model.id.in_(users_favorite_query)))
return query.filter(and_(~self.model.id.in_(users_favorite_query)))
class BaseSupersetModelRestApi(ModelRestApi):
"""
Extends FAB's ModelResApi to implement specific superset generic functionality
"""
csrf_exempt = False
method_permission_name = {
"bulk_delete": "delete",
"data": "list",
"data_from_cache": "list",
"delete": "delete",
"distinct": "list",
"export": "mulexport",
"import_": "add",
"get": "show",
"get_list": "list",
"info": "list",
"post": "add",
"put": "edit",
"refresh": "edit",
"related": "list",
"related_objects": "list",
"schemas": "list",
"select_star": "list",
"table_metadata": "list",
"test_connection": "post",
"thumbnail": "list",
"viz_types": "list",
}
order_rel_fields: Dict[str, Tuple[str, str]] = {}
"""
Impose ordering on related fields query::
order_rel_fields = {
"<RELATED_FIELD>": ("<RELATED_FIELD_FIELD>", "<asc|desc>"),
...
}
"""
related_field_filters: Dict[str, Union[RelatedFieldFilter, str]] = {}
"""
Declare the filters for related fields::
related_fields = {
"<RELATED_FIELD>": <RelatedFieldFilter>)
}
"""
filter_rel_fields: Dict[str, BaseFilter] = {}
"""
Declare the related field base filter::
filter_rel_fields_field = {
"<RELATED_FIELD>": "<FILTER>")
}
"""
allowed_rel_fields: Set[str] = set()
# Declare a set of allowed related fields that the `related` endpoint supports.
text_field_rel_fields: Dict[str, str] = {}
"""
Declare an alternative for the human readable representation of the Model object::
text_field_rel_fields = {
"<RELATED_FIELD>": "<RELATED_OBJECT_FIELD>"
}
"""
extra_fields_rel_fields: Dict[str, List[str]] = {"owners": ["email", "active"]}
"""
Declare extra fields for the representation of the Model object::
extra_fields_rel_fields = {
"<RELATED_FIELD>": "[<RELATED_OBJECT_FIELD_1>, <RELATED_OBJECT_FIELD_2>]"
}
"""
allowed_distinct_fields: Set[str] = set()
add_columns: List[str]
edit_columns: List[str]
list_columns: List[str]
show_columns: List[str]
responses = {
"400": {"description": "Bad request", "content": error_payload_content},
"401": {"description": "Unauthorized", "content": error_payload_content},
"403": {"description": "Forbidden", "content": error_payload_content},
"404": {"description": "Not found", "content": error_payload_content},
"422": {
"description": "Could not process entity",
"content": error_payload_content,
},
"500": {"description": "Fatal error", "content": error_payload_content},
}
def __init__(self) -> None:
super().__init__()
# Setup statsd
self.stats_logger = BaseStatsLogger()
# Add base API spec base query parameter schemas
if self.apispec_parameter_schemas is None: # type: ignore
self.apispec_parameter_schemas = {}
self.apispec_parameter_schemas["get_related_schema"] = get_related_schema
self.openapi_spec_component_schemas: Tuple[
Type[Schema], ...
] = self.openapi_spec_component_schemas + (
RelatedResponseSchema,
DistincResponseSchema,
)
def create_blueprint(
self, appbuilder: AppBuilder, *args: Any, **kwargs: Any
) -> Blueprint:
self.stats_logger = self.appbuilder.get_app.config["STATS_LOGGER"]
return super().create_blueprint(appbuilder, *args, **kwargs)
def _init_properties(self) -> None:
"""
Lock down initial not configured REST API columns. We want to just expose
model ids, if something is misconfigured. By default FAB exposes all available
columns on a Model
"""
model_id = self.datamodel.get_pk_name()
if self.list_columns is None and not self.list_model_schema:
self.list_columns = [model_id]
if self.show_columns is None and not self.show_model_schema:
self.show_columns = [model_id]
if self.edit_columns is None and not self.edit_model_schema:
self.edit_columns = [model_id]
if self.add_columns is None and not self.add_model_schema:
self.add_columns = [model_id]
super()._init_properties()
def _get_related_filter(
self, datamodel: SQLAInterface, column_name: str, value: str
) -> Filters:
filter_field = self.related_field_filters.get(column_name)
if isinstance(filter_field, str):
filter_field = RelatedFieldFilter(cast(str, filter_field), FilterStartsWith)
filter_field = cast(RelatedFieldFilter, filter_field)
search_columns = [filter_field.field_name] if filter_field else None
filters = datamodel.get_filters(search_columns)
base_filters = self.filter_rel_fields.get(column_name)
if base_filters:
filters.add_filter_list(base_filters)
if value and filter_field:
filters.add_filter(
filter_field.field_name, filter_field.filter_class, value
)
return filters
def _get_distinct_filter(self, column_name: str, value: str) -> Filters:
filter_field = RelatedFieldFilter(column_name, FilterStartsWith)
filter_field = cast(RelatedFieldFilter, filter_field)
search_columns = [filter_field.field_name] if filter_field else None
filters = self.datamodel.get_filters(search_columns)
filters.add_filter_list(self.base_filters)
if value and filter_field:
filters.add_filter(
filter_field.field_name, filter_field.filter_class, value
)
return filters
def _get_text_for_model(self, model: Model, column_name: str) -> str:
if column_name in self.text_field_rel_fields:
model_column_name = self.text_field_rel_fields.get(column_name)
if model_column_name:
return getattr(model, model_column_name)
return str(model)
def _get_extra_field_for_model(
self, model: Model, column_name: str
) -> Dict[str, str]:
ret = {}
if column_name in self.extra_fields_rel_fields:
model_column_names = self.extra_fields_rel_fields.get(column_name)
if model_column_names:
for key in model_column_names:
ret[key] = getattr(model, key)
return ret
def _get_result_from_rows(
self, datamodel: SQLAInterface, rows: List[Model], column_name: str
) -> List[Dict[str, Any]]:
return [
{
"value": datamodel.get_pk_value(row),
"text": self._get_text_for_model(row, column_name),
"extra": self._get_extra_field_for_model(row, column_name),
}
for row in rows
]
def _add_extra_ids_to_result(
self,
datamodel: SQLAInterface,
column_name: str,
ids: List[int],
result: List[Dict[str, Any]],
) -> None:
if ids:
# Filter out already present values on the result
values = [row["value"] for row in result]
ids = [id_ for id_ in ids if id_ not in values]
pk_col = datamodel.get_pk()
# Fetch requested values from ids
extra_rows = db.session.query(datamodel.obj).filter(pk_col.in_(ids)).all()
result += self._get_result_from_rows(datamodel, extra_rows, column_name)
def incr_stats(self, action: str, func_name: str) -> None:
"""
Proxy function for statsd.incr to impose a key structure for REST API's
:param action: String with an action name eg: error, success
:param func_name: The function name
"""
self.stats_logger.incr(f"{self.__class__.__name__}.{func_name}.{action}")
def timing_stats(self, action: str, func_name: str, value: float) -> None:
"""
Proxy function for statsd.incr to impose a key structure for REST API's
:param action: String with an action name eg: error, success
:param func_name: The function name
:param value: A float with the time it took for the endpoint to execute
"""
self.stats_logger.timing(
f"{self.__class__.__name__}.{func_name}.{action}", value
)
def send_stats_metrics(
self, response: Response, key: str, time_delta: Optional[float] = None
) -> None:
"""
Helper function to handle sending statsd metrics
:param response: flask response object, will evaluate if it was an error
:param key: The function name
:param time_delta: Optional time it took for the endpoint to execute
"""
if 200 <= response.status_code < 400:
self.incr_stats("success", key)
else:
self.incr_stats("error", key)
if time_delta:
self.timing_stats("time", key, time_delta)
@event_logger.log_this_with_context(
action=lambda self, *args, **kwargs: f"{self.__class__.__name__}.info",
object_ref=False,
log_to_statsd=False,
)
@handle_api_exception
def info_headless(self, **kwargs: Any) -> Response:
"""
Add statsd metrics to builtin FAB _info endpoint
"""
duration, response = time_function(super().info_headless, **kwargs)
self.send_stats_metrics(response, self.info.__name__, duration)
return response
@event_logger.log_this_with_context(
action=lambda self, *args, **kwargs: f"{self.__class__.__name__}.get",
object_ref=False,
log_to_statsd=False,
)
@handle_api_exception
def get_headless(self, pk: int, **kwargs: Any) -> Response:
"""
Add statsd metrics to builtin FAB GET endpoint
"""
duration, response = time_function(super().get_headless, pk, **kwargs)
self.send_stats_metrics(response, self.get.__name__, duration)
return response
@event_logger.log_this_with_context(
action=lambda self, *args, **kwargs: f"{self.__class__.__name__}.get_list",
object_ref=False,
log_to_statsd=False,
)
@handle_api_exception
def get_list_headless(self, **kwargs: Any) -> Response:
"""
Add statsd metrics to builtin FAB GET list endpoint
"""
duration, response = time_function(super().get_list_headless, **kwargs)
self.send_stats_metrics(response, self.get_list.__name__, duration)
return response
@event_logger.log_this_with_context(
action=lambda self, *args, **kwargs: f"{self.__class__.__name__}.post",
object_ref=False,
log_to_statsd=False,
)
@handle_api_exception
def post_headless(self) -> Response:
"""
Add statsd metrics to builtin FAB POST endpoint
"""
duration, response = time_function(super().post_headless)
self.send_stats_metrics(response, self.post.__name__, duration)
return response
@event_logger.log_this_with_context(
action=lambda self, *args, **kwargs: f"{self.__class__.__name__}.put",
object_ref=False,
log_to_statsd=False,
)
@handle_api_exception
def put_headless(self, pk: int) -> Response:
"""
Add statsd metrics to builtin FAB PUT endpoint
"""
duration, response = time_function(super().put_headless, pk)
self.send_stats_metrics(response, self.put.__name__, duration)
return response
@event_logger.log_this_with_context(
action=lambda self, *args, **kwargs: f"{self.__class__.__name__}.delete",
object_ref=False,
log_to_statsd=False,
)
@handle_api_exception
def delete_headless(self, pk: int) -> Response:
"""
Add statsd metrics to builtin FAB DELETE endpoint
"""
duration, response = time_function(super().delete_headless, pk)
self.send_stats_metrics(response, self.delete.__name__, duration)
return response
@expose("/related/<column_name>", methods=["GET"])
@protect()
@safe
@statsd_metrics
@rison(get_related_schema)
@handle_api_exception
def related(self, column_name: str, **kwargs: Any) -> FlaskResponse:
"""Get related fields data
---
get:
parameters:
- in: path
schema:
type: string
name: column_name
- in: query
name: q
content:
application/json:
schema:
$ref: '#/components/schemas/get_related_schema'
responses:
200:
description: Related column data
content:
application/json:
schema:
schema:
$ref: "#/components/schemas/RelatedResponseSchema"
400:
$ref: '#/components/responses/400'
401:
$ref: '#/components/responses/401'
404:
$ref: '#/components/responses/404'
500:
$ref: '#/components/responses/500'
"""
if column_name not in self.allowed_rel_fields:
self.incr_stats("error", self.related.__name__)
return self.response_404()
args = kwargs.get("rison", {})
# handle pagination
page, page_size = self._handle_page_args(args)
ids = args.get("include_ids")
if page and ids:
# pagination with forced ids is not supported
return self.response_422()
try:
datamodel = self.datamodel.get_related_interface(column_name)
except KeyError:
return self.response_404()
page, page_size = self._sanitize_page_args(page, page_size)
# handle ordering
order_field = self.order_rel_fields.get(column_name)
if order_field:
order_column, order_direction = order_field
else:
order_column, order_direction = "", ""
# handle filters
filters = self._get_related_filter(datamodel, column_name, args.get("filter"))
# Make the query
total_rows, rows = datamodel.query(
filters, order_column, order_direction, page=page, page_size=page_size
)
# produce response
result = self._get_result_from_rows(datamodel, rows, column_name)
# If ids are specified make sure we fetch and include them on the response
if ids:
self._add_extra_ids_to_result(datamodel, column_name, ids, result)
total_rows = len(result)
return self.response(200, count=total_rows, result=result)
@expose("/distinct/<column_name>", methods=["GET"])
@protect()
@safe
@statsd_metrics
@rison(get_related_schema)
@handle_api_exception
def distinct(self, column_name: str, **kwargs: Any) -> FlaskResponse:
"""Get distinct values from field data
---
get:
parameters:
- in: path
schema:
type: string
name: column_name
- in: query
name: q
content:
application/json:
schema:
$ref: '#/components/schemas/get_related_schema'
responses:
200:
description: Distinct field data
content:
application/json:
schema:
schema:
$ref: "#/components/schemas/DistincResponseSchema"
400:
$ref: '#/components/responses/400'
401:
$ref: '#/components/responses/401'
404:
$ref: '#/components/responses/404'
500:
$ref: '#/components/responses/500'
"""
if column_name not in self.allowed_distinct_fields:
self.incr_stats("error", self.related.__name__)
return self.response_404()
args = kwargs.get("rison", {})
# handle pagination
page, page_size = self._sanitize_page_args(*self._handle_page_args(args))
# Create generic base filters with added request filter
filters = self._get_distinct_filter(column_name, args.get("filter"))
# Make the query
query_count = self.appbuilder.get_session.query(
func.count(distinct(getattr(self.datamodel.obj, column_name)))
)
count = self.datamodel.apply_filters(query_count, filters).scalar()
if count == 0:
return self.response(200, count=count, result=[])
query = self.appbuilder.get_session.query(
distinct(getattr(self.datamodel.obj, column_name))
)
# Apply generic base filters with added request filter
query = self.datamodel.apply_filters(query, filters)
# Apply sort
query = self.datamodel.apply_order_by(query, column_name, "asc")
# Apply pagination
result = self.datamodel.apply_pagination(query, page, page_size).all()
# produce response
result = [
{"text": item[0], "value": item[0]}
for item in result
if item[0] is not None
]
return self.response(200, count=count, result=result)
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