bkyryliuk commented on a change in pull request #10605:
URL:
https://github.com/apache/incubator-superset/pull/10605#discussion_r470861176
##########
File path: superset/models/alerts.py
##########
@@ -100,3 +109,117 @@ class AlertLog(Model):
@property
def duration(self) -> int:
return (self.dttm_end - self.dttm_start).total_seconds()
+
+
+class Observer:
+
+ __tablename__ = "alert_observers"
+
+ id = Column(Integer, primary_key=True)
+ name = Column(String(150))
+ validation_type = Column(Enum(AlertValidationType))
+
+ @declared_attr
+ def alert_id(self) -> int:
+ return Column(Integer, ForeignKey("alerts.id"), nullable=False)
+
+ @declared_attr
+ def alert(self) -> RelationshipProperty:
+ return relationship(
+ "Alert", foreign_keys=[self.alert_id],
backref=self.__tablename__[:-1]
+ )
+
+ @declared_attr
+ def database_id(self) -> int:
+ return Column(Integer, ForeignKey("dbs.id"), nullable=False)
+
+ @declared_attr
+ def database(self) -> RelationshipProperty:
+ return relationship(
+ "Database",
+ foreign_keys=[self.database_id],
+ backref=backref(self.__tablename__, cascade="all, delete-orphan"),
+ )
+
+
+class SQLObserver(Model, Observer):
+
+ __tablename__ = "sql_alert_observers"
+
+ sql = Column(Text)
+
+ def query(self) -> None:
+ parsed_query = ParsedQuery(self.sql)
+ sql = parsed_query.stripped()
+ df = self.database.get_df(sql)
+
+ self.observations.append( # pylint: disable=no-member
+ SQLObservation(dttm_ts=datetime.utcnow(), value=df.to_json())
+ )
+
+ def get_observations(self, observation_num: int) -> List[Any]:
+ return (
+ db.session.query(SQLObservation)
+ .filter_by(observer_id=self.id)
+ .order_by(Observation.dttm_ts.desc())
+ .limit(observation_num)
+ )
+
+
+class Observation: # pylint: disable=too-few-public-methods
Review comment:
why does it have a table?
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