[python] Fix task condition set wrong deps (#7650) (#7655)

After #7505 merged. we could use condition task type
but our dependent set in the wrong direction, all
the condition operators should be upstream of the
current task instead of downstream

fix: #7649

dolphinscheduler-python/pydolphinscheduler/examples/task_conditions_example.py

@@ -22,11 +22,11 @@ This example will create five task in single workflow, with four shell task and
 condition have one upstream which we declare explicit with syntax `parent >> condition`, and three downstream
 automatically set dependence by condition task by passing parameter `condition`. The graph of this workflow
 like:
-                         --> condition_success_1
-                       /
-parent -> conditions ->  --> condition_success_2
+pre_task_success_1 ->
                       \
-                         --> condition_fail
+pre_task_success_2 ->  --> conditions -> end
+                      /
+pre_task_fail      ->
 .
 """
 
@@ -35,21 +35,22 @@ from pydolphinscheduler.tasks.condition import FAILURE, SUCCESS, And, Conditions
 from pydolphinscheduler.tasks.shell import Shell
 
 with ProcessDefinition(name="task_conditions_example", tenant="tenant_exists") as pd:
-    parent = Shell(name="parent", command="echo parent")
-    condition_success_1 = Shell(
-        name="condition_success_1", command="echo condition_success_1"
+    condition_pre_task_1 = Shell(
+        name="pre_task_success_1", command="echo pre_task_success_1"
     )
-    condition_success_2 = Shell(
-        name="condition_success_2", command="echo condition_success_2"
+    condition_pre_task_2 = Shell(
+        name="pre_task_success_2", command="echo pre_task_success_2"
     )
-    condition_fail = Shell(name="condition_fail", command="echo condition_fail")
+    condition_pre_task_3 = Shell(name="pre_task_fail", command="echo pre_task_fail")
     cond_operator = And(
         And(
-            SUCCESS(condition_success_1, condition_success_2),
-            FAILURE(condition_fail),
+            SUCCESS(condition_pre_task_1, condition_pre_task_2),
+            FAILURE(condition_pre_task_3),
         ),
     )
 
+    end = Shell(name="end", command="echo parent")
+
     condition = Conditions(name="conditions", condition=cond_operator)
-    parent >> condition
+    condition >> end
     pd.submit()

dolphinscheduler-python/pydolphinscheduler/src/pydolphinscheduler/tasks/condition.py

@@ -164,13 +164,13 @@ class Conditions(Task):
         self._set_dep()
 
     def _set_dep(self) -> None:
-        """Set downstream according to parameter `condition`."""
-        downstream = []
+        """Set upstream according to parameter `condition`."""
+        upstream = []
         for cond in self.condition.args:
             if isinstance(cond, ConditionOperator):
                 for status in cond.args:
-                    downstream.extend(list(status.tasks))
-        self.set_downstream(downstream)
+                    upstream.extend(list(status.tasks))
+        self.set_upstream(upstream)
 
     @property
     def task_params(self, camel_attr: bool = True, custom_attr: set = None) -> Dict:

dolphinscheduler-python/pydolphinscheduler/tests/tasks/test_condition.py

@@ -396,44 +396,49 @@ def test_dependent_get_define(mock_condition_code_version, mock_task_code_versio
 def test_condition_set_dep_workflow(mock_task_code_version):
     """Test task condition set dependence in workflow level."""
     with ProcessDefinition(name="test-condition-set-dep-workflow") as pd:
-        parent = Task(name="parent", task_type=TEST_TYPE)
-        condition_success_1 = Task(name="condition_success_1", task_type=TEST_TYPE)
-        condition_success_2 = Task(name="condition_success_2", task_type=TEST_TYPE)
-        condition_fail = Task(name="condition_fail", task_type=TEST_TYPE)
+        condition_pre_task_1 = Task(name="pre_task_success_1", task_type=TEST_TYPE)
+        condition_pre_task_2 = Task(name="pre_task_success_2", task_type=TEST_TYPE)
+        condition_pre_task_3 = Task(name="pre_task_fail", task_type=TEST_TYPE)
         cond_operator = And(
             And(
-                SUCCESS(condition_success_1, condition_success_2),
-                FAILURE(condition_fail),
+                SUCCESS(condition_pre_task_1, condition_pre_task_2),
+                FAILURE(condition_pre_task_3),
             ),
         )
+        end = Task(name="end", task_type=TEST_TYPE)
+
+        condition = Conditions(name="conditions", condition=cond_operator)
+        condition >> end
 
-        condition = Conditions(name=TEST_NAME, condition=cond_operator)
-        parent >> condition
         # General tasks test
         assert len(pd.tasks) == 5
         assert sorted(pd.task_list, key=lambda t: t.name) == sorted(
             [
-                parent,
                 condition,
-                condition_success_1,
-                condition_success_2,
-                condition_fail,
+                condition_pre_task_1,
+                condition_pre_task_2,
+                condition_pre_task_3,
+                end,
             ],
             key=lambda t: t.name,
         )
         # Task dep test
-        assert parent._downstream_task_codes == {condition.code}
-        assert condition._upstream_task_codes == {parent.code}
+        assert end._upstream_task_codes == {condition.code}
+        assert condition._downstream_task_codes == {end.code}
 
         # Condition task dep after ProcessDefinition function get_define called
-        assert condition._downstream_task_codes == {
-            condition_success_1.code,
-            condition_success_2.code,
-            condition_fail.code,
+        assert condition._upstream_task_codes == {
+            condition_pre_task_1.code,
+            condition_pre_task_2.code,
+            condition_pre_task_3.code,
         }
         assert all(
             [
-                child._upstream_task_codes == {condition.code}
-                for child in [condition_success_1, condition_success_2, condition_fail]
+                child._downstream_task_codes == {condition.code}
+                for child in [
+                    condition_pre_task_1,
+                    condition_pre_task_2,
+                    condition_pre_task_3,
+                ]
             ]
         )