Add For query mod

boil/qm/query_mods.go

@@ -136,3 +136,10 @@ func Offset(offset int) QueryMod {
 		boil.SetOffset(q, offset)
 	}
 }
+
+// For inserts a concurrency locking clause at the end of your statement
+func For(clause string) QueryMod {
+	return func(q *boil.Query) {
+		boil.SetFor(q, clause)
+	}
+}

boil/query.go

@@ -34,6 +34,7 @@ type Query struct {
 	having     []having
 	limit      int
 	offset     int
+	forlock    string
 }
 
 type where struct {
@@ -150,6 +151,11 @@ func SetOffset(q *Query, offset int) {
 	q.offset = offset
 }
 
+// SetFor on the query.
+func SetFor(q *Query, clause string) {
+	q.forlock = clause
+}
+
 // SetUpdate on the query.
 func SetUpdate(q *Query, cols map[string]interface{}) {
 	q.update = cols

boil/query_builders.go

@@ -205,6 +205,10 @@ func writeModifiers(q *Query, buf *bytes.Buffer, args *[]interface{}) {
 	if q.offset != 0 {
 		fmt.Fprintf(buf, " OFFSET %d", q.offset)
 	}
+
+	if len(q.forlock) != 0 {
+		fmt.Fprintf(buf, " FOR %s", q.forlock)
+	}
 }
 
 func writeStars(q *Query) []string {