return maxPerPage (not defaultPerPage) if per_page is greater than max (#3124)

it's more user-friendly.

Refs #3065

CHANGELOG_PENDING.md

@@ -21,6 +21,7 @@ Special thanks to external contributors on this release:
 ### FEATURES:
 
 ### IMPROVEMENTS:
+- [rpc] \#3065 return maxPerPage (100), not defaultPerPage (30) if `per_page` is greater than the max 100.
 
 ### BUG FIXES:
 - [log] \#3060 fix year format

rpc/core/pipe.go

@@ -149,8 +149,10 @@ func validatePage(page, perPage, totalCount int) int {
 }
 
 func validatePerPage(perPage int) int {
-	if perPage < 1 || perPage > maxPerPage {
+	if perPage < 1 {
 		return defaultPerPage
+	} else if perPage > maxPerPage {
+		return maxPerPage
 	}
 	return perPage
 }

rpc/core/pipe_test.go

@@ -47,7 +47,6 @@ func TestPaginationPage(t *testing.T) {
 }
 
 func TestPaginationPerPage(t *testing.T) {
-
 	cases := []struct {
 		totalCount int
 		perPage    int
@@ -59,7 +58,7 @@ func TestPaginationPerPage(t *testing.T) {
 		{5, defaultPerPage, defaultPerPage},
 		{5, maxPerPage - 1, maxPerPage - 1},
 		{5, maxPerPage, maxPerPage},
-		{5, maxPerPage + 1, defaultPerPage},
+		{5, maxPerPage + 1, maxPerPage},
 	}
 
 	for _, c := range cases {