BaseOperator to not be a sqlalchemy model anymore

airflow/models.py

@@ -894,7 +894,7 @@ class Log(Base):
         self.owner = task_instance.task.owner
 
 
-class BaseOperator(Base):
+class BaseOperator(object):
     """
     Abstract base class for all operators. Since operators create objects that
     become node in the dag, BaseOperator contains many recursive methods for
@@ -969,21 +969,6 @@ class BaseOperator(Base):
     ui_color = '#fff'
     ui_fgcolor = '#000'
 
-    __tablename__ = "task"
-
-    dag_id = Column(String(ID_LEN), primary_key=True)
-    task_id = Column(String(ID_LEN), primary_key=True)
-    owner = Column(String(500))
-    task_type = Column(String(20))
-    start_date = Column(DateTime())
-    end_date = Column(DateTime())
-    depends_on_past = Column(Integer())
-
-    __mapper_args__ = {
-        'polymorphic_on': task_type,
-        'polymorphic_identity': 'BaseOperator'
-    }
-
     @apply_defaults
     def __init__(
             self,
@@ -1241,7 +1226,11 @@ class BaseOperator(Base):
             return self.downstream_list
 
     def __repr__(self):
-        return "<Task({self.task_type}): {self.task_id}>".format(self=self)
+        return "<Task({self.__class__.__name__}): {self.task_id}>".format(self=self)
+
+    @property
+    def task_type(self):
+        return self.__class__.__name__
 
     def append_only_new(self, l, item):
         if any([item is t for t in l]):

airflow/operators/bash_operator.py

@@ -18,10 +18,6 @@ class BashOperator(BaseOperator):
     template_ext = ('.sh', '.bash',)
     ui_color = '#f0ede4'
 
-    __mapper_args__ = {
-        'polymorphic_identity': 'BashOperator'
-    }
-
     @apply_defaults
     def __init__(self, bash_command, *args, **kwargs):
         super(BashOperator, self).__init__(*args, **kwargs)

airflow/operators/dummy_operator.py

@@ -11,10 +11,6 @@ class DummyOperator(BaseOperator):
     template_fields = tuple()
     ui_color = '#e8f7e4'
 
-    __mapper_args__ = {
-        'polymorphic_identity': 'DummyOperator'
-    }
-
     @apply_defaults
     def __init__(self, *args, **kwargs):
         super(DummyOperator, self).__init__(*args, **kwargs)

airflow/operators/email_operator.py

@@ -20,10 +20,6 @@ class EmailOperator(BaseOperator):
     template_ext = ('.html',)
     ui_color = '#e6faf9'
 
-    __mapper_args__ = {
-        'polymorphic_identity': 'EmailOperator'
-    }
-
     @apply_defaults
     def __init__(
             self,

airflow/operators/hive_operator.py

@@ -22,9 +22,6 @@ class HiveOperator(BaseOperator):
     :type script_begin_tag: str
     """
 
-    __mapper_args__ = {
-        'polymorphic_identity': 'HiveOperator'
-    }
     template_fields = ('hql', 'schema')
     template_ext = ('.hql', '.sql',)
     ui_color = '#f0e4ec'

airflow/operators/hive_stats_operator.py

@@ -40,9 +40,6 @@ class HiveStatsCollectionOperator(BaseOperator):
     :type assignment_func: function
     """
 
-    __mapper_args__ = {
-        'polymorphic_identity': 'HiveStatsCollectionOperator'
-    }
     template_fields = ('table', 'partition', 'ds', 'dttm')
     ui_color = '#aff7a6'
 

airflow/operators/hive_to_mysql.py

@@ -27,9 +27,6 @@ class HiveToMySqlTransfer(BaseOperator):
     :type mysql_preoperator: str
     """
 
-    __mapper_args__ = {
-        'polymorphic_identity': 'HiveToMySqlTransfer'
-    }
     template_fields = ('sql', 'mysql_table')
     template_ext = ('.sql',)
     ui_color = '#a0e08c'

airflow/operators/hive_to_samba_operator.py

@@ -19,9 +19,6 @@ class Hive2SambaOperator(BaseOperator):
     :type samba_conn_id: string
     """
 
-    __mapper_args__ = {
-        'polymorphic_identity': 'Hive2SambaOperator'
-    }
     template_fields = ('hql', 'destination_filepath')
     template_ext = ('.hql', '.sql',)
 

airflow/operators/mysql_operator.py

@@ -16,9 +16,6 @@ class MySqlOperator(BaseOperator):
         a '.sql' extensions.
     """
 
-    __mapper_args__ = {
-        'polymorphic_identity': 'MySqlOperator'
-    }
     template_fields = ('sql',)
     template_ext = ('.sql',)
     ui_color = '#ededed'

airflow/operators/mysql_to_hive.py

@@ -45,9 +45,6 @@ class MySqlToHiveTransfer(BaseOperator):
     :type hive_conn_id: str
     """
 
-    __mapper_args__ = {
-        'polymorphic_identity': 'MySqlToHiveOperator'
-    }
     template_fields = ('sql', 'partition', 'hive_table')
     template_ext = ('.sql',)
     ui_color = '#a0e08c'

airflow/operators/postgres_operator.py

@@ -16,9 +16,6 @@ class PostgresOperator(BaseOperator):
         a '.sql' extensions.
     """
 
-    __mapper_args__ = {
-        'polymorphic_identity': 'PostgresOperator'
-    }
     template_fields = ('sql',)
     template_ext = ('.sql',)
     ui_color = '#ededed'

airflow/operators/presto_check_operator.py

@@ -15,9 +15,6 @@ class PrestoCheckOperator(BaseOperator):
     :type presto_conn_id: string
     """
 
-    __mapper_args__ = {
-        'polymorphic_identity': 'PrestoCheckOperator'
-    }
     template_fields = ('sql',)
     template_ext = ('.hql', '.sql',)
     ui_color = '#fff7e6'

airflow/operators/python_operator.py

@@ -26,10 +26,6 @@ class PythonOperator(BaseOperator):
     template_fields = tuple()
     ui_color = '#ffefeb'
 
-    __mapper_args__ = {
-        'polymorphic_identity': 'PythonOperator'
-    }
-
     @apply_defaults
     def __init__(
             self,

airflow/operators/s3_file_transform_operator.py

@@ -1,7 +1,6 @@
 import logging
 from tempfile import NamedTemporaryFile
 import subprocess
-import os
 
 from airflow.hooks import S3Hook
 from airflow.models import BaseOperator
@@ -9,14 +8,14 @@ from airflow.utils import apply_defaults
 
 class S3FileTransformOperator(BaseOperator):
     """
-    Copies data from a source S3 location to a temporary location on the 
-    local filesystem. Runs a transformation on this file as specified by 
+    Copies data from a source S3 location to a temporary location on the
+    local filesystem. Runs a transformation on this file as specified by
     the transformation script and uploads the output to a destination S3 location.
 
-    The locations of the source and the destination files in the local filesystem 
+    The locations of the source and the destination files in the local filesystem
     is provided as an first and second arguments to the transformation script.
-    The transformation script is expected to read the data from source , transform it 
-    and write the output to the local destination file. The operator then takes over 
+    The transformation script is expected to read the data from source , transform it
+    and write the output to the local destination file. The operator then takes over
     control and uploads the local destination file to S3.
 
     :param source_s3_key: The key to be retrieved from S3
@@ -33,12 +32,9 @@ class S3FileTransformOperator(BaseOperator):
     :type transform_script: str
     """
 
-    __mapper_args__ = {
-        'polymorphic_identity': 'S3FileTransformOperator'
-    }
     template_fields = ('source_s3_key', 'dest_s3_key')
     template_ext = ()
-    ui_color = '#f9c915'    
+    ui_color = '#f9c915'
 
     @apply_defaults
     def __init__(
@@ -81,8 +77,8 @@ class S3FileTransformOperator(BaseOperator):
             logging.info("Uploading transformed file to S3")
             f_dest.flush()
             self.dest_s3.load_file(
-                filename=f_dest.name, 
-                key=self.dest_s3_key, 
+                filename=f_dest.name,
+                key=self.dest_s3_key,
                 replace=self.replace
             )
             logging.info("Upload successful")

airflow/operators/s3_to_hive_operator.py

@@ -54,9 +54,6 @@ class S3ToHiveTransfer(BaseOperator):
     :type hive_conn_id: str
     """
 
-    __mapper_args__ = {
-        'polymorphic_identity': 'S3ToHiveOperator'
-    }
     template_fields = ('s3_key', 'partition', 'hive_table')
     template_ext = ()
     ui_color = '#a0e08c'

airflow/operators/sensors.py

@@ -66,10 +66,6 @@ class SqlSensor(BaseSensorOperator):
     template_fields = ('sql',)
     template_ext = ('.hql', '.sql',)
 
-    __mapper_args__ = {
-        'polymorphic_identity': 'SqlSensor'
-    }
-
     @apply_defaults
     def __init__(self, conn_id, sql, *args, **kwargs):
 
@@ -111,9 +107,6 @@ class ExternalTaskSensor(BaseSensorOperator):
     :type external_task_id: string
     """
     template_fields = ('execution_date',)
-    __mapper_args__ = {
-        'polymorphic_identity': 'ExternalTaskSensor'
-    }
 
     @apply_defaults
     def __init__(self, external_dag_id, external_task_id, *args, **kwargs):
@@ -155,9 +148,6 @@ class HivePartitionSensor(BaseSensorOperator):
     :type partition: string
     """
     template_fields = ('table', 'partition',)
-    __mapper_args__ = {
-        'polymorphic_identity': 'HivePartitionSensor'
-    }
 
     @apply_defaults
     def __init__(
@@ -193,9 +183,6 @@ class HdfsSensor(BaseSensorOperator):
     Waits for a file or folder to land in HDFS
     """
     template_fields = ('filepath',)
-    __mapper_args__ = {
-        'polymorphic_identity': 'HdfsSensor'
-    }
 
     @apply_defaults
     def __init__(
@@ -235,9 +222,6 @@ class S3KeySensor(BaseSensorOperator):
     :type wildcard_match: bool
     """
     template_fields = ('bucket_key', 'bucket_name')
-    __mapper_args__ = {
-        'polymorphic_identity': 'S3KeySensor'
-    }
 
     @apply_defaults
     def __init__(
@@ -300,9 +284,6 @@ class S3PrefixSensor(BaseSensorOperator):
     :type bucket_name: str
     """
     template_fields = ('bucket_key', 'bucket_name')
-    __mapper_args__ = {
-        'polymorphic_identity': 'S3PrefixSensor'
-    }
 
     @apply_defaults
     def __init__(
@@ -342,9 +323,6 @@ class TimeSensor(BaseSensorOperator):
     :type target_time: datetime.time
     """
     template_fields = tuple()
-    __mapper_args__ = {
-        'polymorphic_identity': 'TimeSensor'
-    }
 
     @apply_defaults
     def __init__(self, target_time, *args, **kwargs):

airflow/operators/sqlite_operator.py

@@ -16,9 +16,6 @@ class SqliteOperator(BaseOperator):
         a '.sql' extensions.
     """
 
-    __mapper_args__ = {
-        'polymorphic_identity': 'sqliteOperator'
-    }
     template_fields = ('sql',)
     template_ext = ('.sql',)
     ui_color = '#cdaaed'

airflow/operators/subdag_operator.py

@@ -9,10 +9,6 @@ class SubDagOperator(BaseOperator):
     ui_color = '#555'
     ui_fgcolor = '#fff'
 
-    __mapper_args__ = {
-        'polymorphic_identity': 'SubDagOperator'
-    }
-
     @apply_defaults
     def __init__(
             self,

airflow/www/app.py

@@ -1097,7 +1097,10 @@ class Airflow(BaseView):
             for ti in dag.get_task_instances(session, dttm, dttm)
         }
         tasks = {
-            t.task_id: utils.alchemy_to_dict(t)
+            t.task_id: {
+                'dag_id': t.dag_id,
+                'task_type': t.task_type,
+            }
             for t in dag.tasks
         }
         if not tasks: