fix config ui error about cache ttl (#6861)

Author: lunny

options/locale/locale_en-US.ini

@@ -1757,6 +1757,7 @@ config.cache_config = Cache Configuration
 config.cache_adapter = Cache Adapter
 config.cache_interval = Cache Interval
 config.cache_conn = Cache Connection
+config.cache_item_ttl = Cache Item TTL
 
 config.session_config = Session Configuration
 config.session_provider = Session Provider

routers/admin/admin.go

@@ -234,6 +234,7 @@ func Config(ctx *context.Context) {
 	ctx.Data["CacheAdapter"] = setting.CacheService.Adapter
 	ctx.Data["CacheInterval"] = setting.CacheService.Interval
 	ctx.Data["CacheConn"] = setting.CacheService.Conn
+	ctx.Data["CacheItemTTL"] = setting.CacheService.TTL
 
 	ctx.Data["SessionConfig"] = setting.SessionConfig
 

templates/admin/config.tmpl

@@ -233,11 +233,15 @@
 			<dl class="dl-horizontal admin-dl-horizontal">
 				<dt>{{.i18n.Tr "admin.config.cache_adapter"}}</dt>
 				<dd>{{.CacheAdapter}}</dd>
+				{{if eq .CacheAdapter "memory"}}
 				<dt>{{.i18n.Tr "admin.config.cache_interval"}}</dt>
 				<dd>{{.CacheInterval}} {{.i18n.Tr "tool.raw_seconds"}}</dd>
+				{{end}}
 				{{if .CacheConn}}
 				<dt>{{.i18n.Tr "admin.config.cache_conn"}}</dt>
 				<dd><code>{{.CacheConn}}</code></dd>
+				<dt>{{.i18n.Tr "admin.config.cache_item_ttl"}}</dt>
+				<dd><code>{{.CacheItemTTL}}</code></dd>
 				{{end}}
 			</dl>
 		</div>