update logic for node creation

awx_collection/plugins/modules/tower_workflow_job_template_node.py

@@ -205,13 +205,17 @@ def main():
         state=dict(choices=['present', 'absent'], default='present'),
     )
     mutually_exclusive = [("unified_job_template", "approval_node")]
-    required_one_of = [["unified_job_template", "approval_node", "success_nodes", "always_nodes", "failure_nodes"]]
+    required_if=[
+      ['state', 'absent', ['identifier']],
+      ['state', 'present', ['identifier']],
+      ['state', 'present', ['unified_job_template', 'approval_node', 'success_nodes', 'always_nodes', 'failure_nodes'], 'true'],
+    ]
 
     # Create a module for ourselves
     module = TowerAPIModule(
         argument_spec=argument_spec,
         mutually_exclusive=mutually_exclusive,
-        required_one_of=required_one_of,
+        required_if=required_if,
     )
 
     # Extract our parameters

awx_collection/tests/integration/targets/tower_workflow_job_template/tasks/main.yml

@@ -159,6 +159,30 @@
     that:
       - "no_name_results.msg == 'Approval node name is required to create approval node.'"
 
+- name: Fail if absent and no identifier set
+  tower_workflow_job_template_node:
+    approval_node:
+      description: "{{ approval_node_name }}"
+    workflow: "{{ wfjt_name }}"
+    state: absent
+  register: no_identifier_results
+  ignore_errors: true
+
+- assert:
+    that:
+      - "no_identifier_results.msg == 'missing required arguments: identifier'"
+
+- name: Fail if present and no unified job template set
+  tower_workflow_job_template_node:
+    identifier: approval_test
+    workflow: "{{ wfjt_name }}"
+  register: no_unified_results
+  ignore_errors: true
+
+- assert:
+    that:
+      - "no_unified_results.msg == 'state is present but any of the following are missing: unified_job_template, approval_node, success_nodes, always_nodes, failure_nodes'"
+
 - name: Create approval node
   tower_workflow_job_template_node:
     identifier: approval_test