ent: add AND operator for type predicates

Reviewed By: alexsn

Differential Revision: D16668249

fbshipit-source-id: 1554c3af9779fd551a90218c604d23b5bf8b8c6b

entc/integration/ent/node/where.go

@@ -359,7 +359,27 @@ func HasNextWith(preds ...predicate.Node) predicate.Node {
 	)
 }
 
-// Or groups list of predicates with the or operator between them.
+// And groups list of predicates with the AND operator between them.
+func And(predicates ...predicate.Node) predicate.Node {
+	return predicate.NodePerDialect(
+		func(s *sql.Selector) {
+			for _, p := range predicates {
+				p(s)
+			}
+		},
+		func(tr *dsl.Traversal) {
+			trs := make([]interface{}, 0, len(predicates))
+			for _, p := range predicates {
+				t := __.New()
+				p(t)
+				trs = append(trs, t)
+			}
+			tr.Where(__.And(trs...))
+		},
+	)
+}
+
+// Or groups list of predicates with the OR operator between them.
 func Or(predicates ...predicate.Node) predicate.Node {
 	return predicate.NodePerDialect(
 		func(s *sql.Selector) {