[AnsibleArgSpecValidator] remove empty keys from task args before validation

changelogs/fragments/validate.yaml

@@ -0,0 +1,3 @@
+---
+bugfixes:
+  - "AnsibleArgSpecValidator - removes empty keys in task args before validating against schema."

plugins/module_utils/common/argspec_validate.py

@@ -29,7 +29,10 @@ def _check_argspec(self):
 from ansible.module_utils.basic import AnsibleModule
 from ansible.module_utils.six import iteritems
 
-from ansible_collections.ansible.utils.plugins.module_utils.common.utils import dict_merge
+from ansible_collections.ansible.utils.plugins.module_utils.common.utils import (
+    dict_merge,
+    remove_empties,
+)
 
 
 try:
@@ -220,7 +223,7 @@ def _validate(self):
             )
             updated_data = {}
         else:
-            mm = MonkeyModule(data=self._data, schema=self._schema, name=self._name)
+            mm = MonkeyModule(data=remove_empties(self._data), schema=self._schema, name=self._name)
             valid, errors, updated_data = mm.validate()
         return valid, errors, updated_data
 

plugins/module_utils/common/utils.py

@@ -109,3 +109,32 @@ def to_list(val):
         return [val]
     else:
         return list()
+
+
+def remove_empties(cfg_dict):
+    """
+    Generate final config dictionary
+
+    :param cfg_dict: A dictionary parsed in the facts system
+    :rtype: A dictionary
+    :returns: A dictionary by eliminating keys that have null values
+    """
+    final_cfg = {}
+    if not cfg_dict:
+        return final_cfg
+
+    for key, val in iteritems(cfg_dict):
+        dct = None
+        if isinstance(val, dict):
+            child_val = remove_empties(val)
+            if child_val:
+                dct = {key: child_val}
+        elif isinstance(val, list) and val and all(isinstance(x, dict) for x in val):
+            child_val = [remove_empties(x) for x in val]
+            if child_val:
+                dct = {key: child_val}
+        elif val not in [None, [], {}, (), ""]:
+            dct = {key: val}
+        if dct:
+            final_cfg.update(dct)
+    return final_cfg