docs: add reading lag field comment (#2451)

monkey92t · vmihailenco · web-flow · commit e309eaf915a7 · 2023-02-24T20:21:12.000+08:00
Signed-off-by: monkey92t &lt;golang@88.com&gt;
Co-authored-by: Vladimir Mihailenco &lt;vladimir.webdev@gmail.com&gt;
diff --git a/command.go b/command.go
@@ -2057,6 +2057,9 @@ func (cmd *XInfoGroupsCmd) readReply(rd *proto.Reader) error {
 				}
 			case "lag":
 				group.Lag, err = rd.ReadInt()
+
+				// lag: the number of entries in the stream that are still waiting to be delivered
+				// to the group's consumers, or a NULL(Nil) when that number can't be determined.
 				if err != nil && err != Nil {
 					return err
 				}
@@ -2366,6 +2369,8 @@ func readStreamGroups(rd *proto.Reader) ([]XInfoStreamGroup, error) {
 					return nil, err
 				}
 			case "lag":
+				// lag: the number of entries in the stream that are still waiting to be delivered
+				// to the group's consumers, or a NULL(Nil) when that number can't be determined.
 				group.Lag, err = rd.ReadInt()
 				if err != nil && err != Nil {
 					return nil, err

Original file line number	Diff line number	Diff line change
`@@ -2057,6 +2057,9 @@ func (cmd XInfoGroupsCmd) readReply(rd proto.Reader) error {`
`2057`	`2057`	`}`
`2058`	`2058`	`case "lag":`
`2059`	`2059`	`group.Lag, err = rd.ReadInt()`
	`2060`	`+`
	`2061`	`+ // lag: the number of entries in the stream that are still waiting to be delivered`
	`2062`	`+ // to the group's consumers, or a NULL(Nil) when that number can't be determined.`
`2060`	`2063`	`if err != nil && err != Nil {`
`2061`	`2064`	`return err`
`2062`	`2065`	`}`
`@@ -2366,6 +2369,8 @@ func readStreamGroups(rd *proto.Reader) ([]XInfoStreamGroup, error) {`
`2366`	`2369`	`return nil, err`
`2367`	`2370`	`}`
`2368`	`2371`	`case "lag":`
	`2372`	`+ // lag: the number of entries in the stream that are still waiting to be delivered`
	`2373`	`+ // to the group's consumers, or a NULL(Nil) when that number can't be determined.`
`2369`	`2374`	`group.Lag, err = rd.ReadInt()`
`2370`	`2375`	`if err != nil && err != Nil {`
`2371`	`2376`	`return nil, err`