Can traverse straight from parent operator (parent.blah)

pkg/yqlib/doc/operators/parent.md

@@ -37,6 +37,25 @@ fruit: banana
 name: sam
 ```
 
+## Get parent attribute
+Given a sample.yml file of:
+```yaml
+a:
+  fruit: apple
+  name: bob
+b:
+  fruit: banana
+  name: sam
+```
+then
+```bash
+yq '.. | select(. == "banana") | parent.name' sample.yml
+```
+will output
+```yaml
+sam
+```
+
 ## N-th parent
 You can optionally supply the number of levels to go up for the parent, the default being 1.
 

pkg/yqlib/lexer_participle.go

@@ -517,15 +517,15 @@ func parentWithLevel() yqAction {
 
 		prefs := parentOpPreferences{Level: level}
 		op := &Operation{OperationType: getParentOpType, Value: getParentOpType.Type, StringValue: value, Preferences: prefs}
-		return &token{TokenType: operationToken, Operation: op}, nil
+		return &token{TokenType: operationToken, Operation: op, CheckForPostTraverse: true}, nil
 	}
 }
 
 func parentWithDefaultLevel() yqAction {
 	return func(rawToken lexer.Token) (*token, error) {
 		prefs := parentOpPreferences{Level: 1}
 		op := &Operation{OperationType: getParentOpType, Value: getParentOpType.Type, StringValue: getParentOpType.Type, Preferences: prefs}
-		return &token{TokenType: operationToken, Operation: op}, nil
+		return &token{TokenType: operationToken, Operation: op, CheckForPostTraverse: true}, nil
 	}
 }
 

pkg/yqlib/operator_parent_test.go

@@ -21,6 +21,14 @@ var parentOperatorScenarios = []expressionScenario{
 			"D0, P[b], (!!map)::{fruit: banana, name: sam}\n",
 		},
 	},
+	{
+		description: "Get parent attribute",
+		document:    `{a: {fruit: apple, name: bob}, b: {fruit: banana, name: sam}}`,
+		expression:  `.. | select(. == "banana") | parent.name`,
+		expected: []string{
+			"D0, P[b name], (!!str)::sam\n",
+		},
+	},
 	{
 		description:    "N-th parent",
 		subdescription: "You can optionally supply the number of levels to go up for the parent, the default being 1.",