Issue 284 Move sensor data from Power/Price/Weather to TimedBelief

documentation/changelog.rst

@@ -23,6 +23,7 @@ Infrastructure / Support
 * Allow plugins to register their custom config settings, so that FlexMeasures can check whether they are set up correctly [see `PR #230 <http://www.github.com/FlexMeasures/flexmeasures/pull/230>`_ and `PR #237 <http://www.github.com/FlexMeasures/flexmeasures/pull/237>`_]
 * Add sensor method to obtain just its latest state (excl. forecasts) [see `PR #235 <http://www.github.com/FlexMeasures/flexmeasures/pull/235>`_]
 * Migrate attributes of assets, markets and weather sensors to our new sensor model [see `PR #254 <http://www.github.com/FlexMeasures/flexmeasures/pull/254>`_ and `project 9 <http://www.github.com/FlexMeasures/flexmeasures/projects/9>`_]
+* Migrate all time series data to our new sensor data model based on the `timely beliefs <https://github.com/SeitaBV/timely-beliefs>`_ lib [see `PR #286 <http://www.github.com/FlexMeasures/flexmeasures/pull/286>`_ and `project 9 <http://www.github.com/FlexMeasures/flexmeasures/projects/9>`_]
 
 
 v0.7.1 | November 08, 2021

flexmeasures/api/__init__.py

@@ -2,8 +2,10 @@
 from flask_security.utils import verify_password
 from flask_json import as_json
 from flask_login import current_user
+from sqlalchemy.exc import IntegrityError
 
 from flexmeasures import __version__ as flexmeasures_version
+from flexmeasures.api.common.utils.api_utils import catch_timed_belief_replacements
 from flexmeasures.data.models.user import User
 from flexmeasures.api.common.utils.args_parsing import (
     validation_error_handler,
@@ -84,6 +86,7 @@ def register_at(app: Flask):
 
     # handle API specific errors
     app.register_error_handler(FMValidationError, validation_error_handler)
+    app.register_error_handler(IntegrityError, catch_timed_belief_replacements)
     app.unauthorized_handler_api = invalid_sender
 
     app.register_blueprint(

flexmeasures/api/common/responses.py

@@ -39,11 +39,25 @@ def deprecated_api_version(message: str) -> ResponseTuple:
 def already_received_and_successfully_processed(message: str) -> ResponseTuple:
     return (
         dict(
-            results="Rejected",
+            results="PROCESSED",
             status="ALREADY_RECEIVED_AND_SUCCESSFULLY_PROCESSED",
             message=message,
         ),
-        400,
+        200,
+    )
+
+
+@BaseMessage(
+    "Some of the data represents a replacement, which is reserved for servers in play mode. Enable play mode or update the prior in your request."
+)
+def invalid_replacement(message: str) -> ResponseTuple:
+    return (
+        dict(
+            results="Rejected",
+            status="INVALID_REPLACEMENT",
+            message=message,
+        ),
+        403,
     )
 
 

flexmeasures/api/common/utils/api_utils.py

@@ -1,5 +1,4 @@
 from timely_beliefs.beliefs.classes import BeliefsDataFrame
-from flexmeasures.data.models.time_series import TimedBelief
 from typing import List, Sequence, Tuple, Union
 import copy
 from datetime import datetime, timedelta
@@ -8,6 +7,7 @@
 from flask import current_app
 from inflection import pluralize
 from numpy import array
+from psycopg2.errors import UniqueViolation
 from rq.job import Job
 from sqlalchemy.exc import IntegrityError
 import timely_beliefs as tb
@@ -16,16 +16,18 @@
 from flexmeasures.data.models.assets import Asset, Power
 from flexmeasures.data.models.generic_assets import GenericAsset, GenericAssetType
 from flexmeasures.data.models.markets import Price
-from flexmeasures.data.models.time_series import Sensor
+from flexmeasures.data.models.time_series import Sensor, TimedBelief
 from flexmeasures.data.models.weather import WeatherSensor, Weather
 from flexmeasures.data.services.time_series import drop_unchanged_beliefs
-from flexmeasures.data.utils import save_to_session
+from flexmeasures.data.utils import save_to_session, save_to_db as modern_save_to_db
 from flexmeasures.api.common.responses import (
+    invalid_replacement,
     unrecognized_sensor,
     ResponseTuple,
     request_processed,
     already_received_and_successfully_processed,
 )
+from flexmeasures.utils.error_utils import error_handling_router
 
 
 def list_access(service_listing, service_name):
@@ -340,6 +342,40 @@ def get_sensor_by_generic_asset_type_and_location(
     return sensor
 
 
+def enqueue_forecasting_jobs(
+    forecasting_jobs: List[Job] = None,
+):
+    """Enqueue forecasting jobs.
+
+    :param forecasting_jobs: list of forecasting Jobs for redis queues.
+    """
+    if forecasting_jobs is not None:
+        [current_app.queues["forecasting"].enqueue_job(job) for job in forecasting_jobs]
+
+
+def save_and_enqueue(
+    data: Union[BeliefsDataFrame, List[BeliefsDataFrame]],
+    forecasting_jobs: List[Job] = None,
+    save_changed_beliefs_only: bool = True,
+) -> ResponseTuple:
+
+    # Attempt to save
+    status = modern_save_to_db(
+        data, save_changed_beliefs_only=save_changed_beliefs_only
+    )
+
+    # Only enqueue forecasting jobs upon successfully saving new data
+    if status[:7] == "success":
+        enqueue_forecasting_jobs(forecasting_jobs)
+
+    # Pick a response
+    if status == "success":
+        return request_processed()
+    elif status == "success_with_unchanged_beliefs_skipped":
+        return already_received_and_successfully_processed()
+    return invalid_replacement()
+
+
 def save_to_db(
     timed_values: Union[BeliefsDataFrame, List[Union[Power, Price, Weather]]],
     forecasting_jobs: List[Job] = [],
@@ -349,14 +385,22 @@ def save_to_db(
 
     Data can only be replaced on servers in play mode.
 
-    TODO: remove options for Power, Price and Weather if we only handle beliefs one day.
+    TODO: remove this legacy function in its entirety (announced v0.8.0)
 
     :param timed_values: BeliefsDataFrame or a list of Power, Price or Weather values to be saved
     :param forecasting_jobs: list of forecasting Jobs for redis queues.
     :param save_changed_beliefs_only: if True, beliefs that are already stored in the database with an earlier belief time are dropped.
     :returns: ResponseTuple
     """
 
+    import warnings
+
+    warnings.warn(
+        "The method api.common.utils.api_utils.save_to_db is deprecated. Check out the following replacements:"
+        "- [recommended option] to store BeliefsDataFrames only, switch to data.utils.save_to_db"
+        "- to store BeliefsDataFrames and enqueue jobs, switch to api.common.utils.api_utils.save_and_enqueue"
+    )
+
     if isinstance(timed_values, BeliefsDataFrame):
 
         if save_changed_beliefs_only:
@@ -450,3 +494,18 @@ def determine_belief_timing(
         ]
         return event_starts, belief_horizons
     raise ValueError("Missing horizon or prior.")
+
+
+def catch_timed_belief_replacements(error: IntegrityError):
+    """Catch IntegrityErrors due to a UniqueViolation on the TimedBelief primary key.
+
+    Return a more informative message.
+    """
+    if isinstance(error.orig, UniqueViolation) and "timed_belief_pkey" in str(
+        error.orig
+    ):
+        # Some beliefs represented replacements, which was forbidden
+        return invalid_replacement()
+
+    # Forward to our generic error handler
+    return error_handling_router(error)

flexmeasures/api/common/utils/validators.py

@@ -271,7 +271,7 @@ def get_meter_data(user_source_ids):
         }
 
     The source ids then include the user's own id,
-    and ids of other users that are registered as a Prosumer and/or Energy Service Company.
+    and ids of other users whose organisation account is registered as a Prosumer and/or Energy Service Company.
     """
 
     def wrapper(fn):

flexmeasures/api/dev/sensor_data.py

@@ -1,7 +1,7 @@
 from webargs.flaskparser import use_args
 
 from flexmeasures.api.common.schemas.sensor_data import SensorDataSchema
-from flexmeasures.api.common.utils.api_utils import save_to_db
+from flexmeasures.api.common.utils.api_utils import save_and_enqueue
 
 
 @use_args(
@@ -15,13 +15,13 @@ def post_data(sensor_data):
     to create and save the data structure.
     """
     beliefs = SensorDataSchema.load_bdf(sensor_data)
-    response, code = save_to_db(beliefs)
+    response, code = save_and_enqueue(beliefs)
     response.update(type="PostSensorDataResponse")
     return response, code
 
 
 def get_data():
-    """ GET from /sensorData"""
+    """GET from /sensorData"""
     # - use data.models.time_series.Sensor::search_beliefs() - might need to add a belief_horizon parameter
     # - create the serialize method on the schema, to turn the resulting BeliefsDataFrame
     #   to the JSON the API should respond with.

flexmeasures/api/dev/tests/test_sensor_data.py

@@ -65,17 +65,32 @@ def test_post_invalid_sensor_data(
 def test_post_sensor_data_twice(client, setup_api_test_data):
     auth_token = get_auth_token(client, "test_prosumer_user@seita.nl", "testtest")
     post_data = make_sensor_data_request_for_gas_sensor()
+
+    # Check that 1st time posting the data succeeds
     response = client.post(
         url_for("post_sensor_data"),
         json=post_data,
         headers={"Authorization": auth_token},
     )
     assert response.status_code == 200
+
+    # Check that 2nd time posting the same data succeeds informatively
     response = client.post(
         url_for("post_sensor_data"),
         json=post_data,
         headers={"Authorization": auth_token},
     )
     print(response.json)
-    assert response.status_code == 400
+    assert response.status_code == 200
     assert "data has already been received" in response.json["message"]
+
+    # Check that replacing data fails informatively
+    post_data["values"][0] = 100
+    response = client.post(
+        url_for("post_sensor_data"),
+        json=post_data,
+        headers={"Authorization": auth_token},
+    )
+    print(response.json)
+    assert response.status_code == 403
+    assert "data represents a replacement" in response.json["message"]

flexmeasures/api/v1/implementations.py

@@ -11,9 +11,9 @@
     parse_entity_address,
     EntityAddressException,
 )
-from flexmeasures.data.models.assets import Power
+from flexmeasures.data import db
 from flexmeasures.data.models.data_sources import get_or_create_source
-from flexmeasures.data.models.time_series import Sensor
+from flexmeasures.data.models.time_series import Sensor, TimedBelief
 from flexmeasures.data.services.resources import get_sensors
 from flexmeasures.data.services.forecasting import create_forecasting_jobs
 from flexmeasures.api.common.responses import (
@@ -26,7 +26,7 @@
 )
 from flexmeasures.api.common.utils.api_utils import (
     groups_to_dict,
-    save_to_db,
+    save_and_enqueue,
 )
 from flexmeasures.api.common.utils.validators import (
     type_accepted,
@@ -199,8 +199,8 @@ def collect_connection_and_value_groups(
 
         # Get the power values
         # TODO: fill NaN for non-existing values
-        power_bdf_dict: Dict[str, tb.BeliefsDataFrame] = Power.search(
-            old_sensor_names=sensor_names,
+        power_bdf_dict: Dict[str, tb.BeliefsDataFrame] = TimedBelief.search(
+            sensor_names,
             event_starts_after=start,
             event_ends_before=end,
             resolution=resolution,
@@ -210,6 +210,8 @@ def collect_connection_and_value_groups(
             beliefs_before=belief_time_window[1],
             user_source_ids=user_source_ids,
             source_types=source_types,
+            most_recent_beliefs_only=True,
+            one_deterministic_belief_per_event=True,
             sum_multiple=False,
         )
         # Todo: parse time window of power_bdf_dict, which will be different for requests that are not of the form:
@@ -251,7 +253,7 @@ def create_connection_and_value_groups(  # noqa: C901
     if not user_sensors:
         current_app.logger.info("User doesn't seem to have any assets")
     user_sensor_ids = [sensor.id for sensor in user_sensors]
-    power_measurements = []
+    power_df_per_connection = []
     forecasting_jobs = []
     for connection_group, value_group in zip(generic_asset_name_groups, value_groups):
         for connection in connection_group:
@@ -291,7 +293,8 @@ def create_connection_and_value_groups(  # noqa: C901
                 )
                 return power_value_too_big(extra_info)
 
-            # Create new Power objects
+            # Create a new BeliefsDataFrame
+            beliefs = []
             for j, value in enumerate(value_group):
                 dt = start + j * duration / len(value_group)
                 if rolling:
@@ -300,29 +303,31 @@ def create_connection_and_value_groups(  # noqa: C901
                     h = horizon - (
                         (start + duration) - (dt + duration / len(value_group))
                     )
-                p = Power(
-                    datetime=dt,
-                    value=value
+                p = TimedBelief(
+                    event_start=dt,
+                    event_value=value
                     * -1,  # Reverse sign for FlexMeasures specs with positive production and negative consumption
-                    horizon=h,
-                    sensor_id=sensor_id,
-                    data_source_id=data_source.id,
+                    belief_horizon=h,
+                    sensor=sensor,
+                    source=data_source,
                 )
-                power_measurements.append(p)
+
+                assert p not in db.session
+                beliefs.append(p)
+            power_df_per_connection.append(tb.BeliefsDataFrame(beliefs))
 
             # make forecasts, but only if the sent-in values are not forecasts themselves
             if horizon <= timedelta(
                 hours=0
             ):  # Todo: replace 0 hours with whatever the moment of switching from ex-ante to ex-post is for this sensor
                 forecasting_jobs.extend(
                     create_forecasting_jobs(
-                        Power,
                         sensor_id,
                         start,
                         start + duration,
                         resolution=duration / len(value_group),
-                        enqueue=False,
+                        enqueue=False,  # will enqueue later, after saving data
                     )
                 )
 
-    return save_to_db(power_measurements, forecasting_jobs)
+    return save_and_enqueue(power_df_per_connection, forecasting_jobs)