goctl model reactor (#15)

* reactor sql generation

* reactor sql generation

* add console & example

* optimize unit test & add document

* modify default config

* remove test file

* Revert "remove test file"

This reverts commit 81041f9e

* fix stringx.go & optimize example

* remove unused code

tools/goctl/model/sql/template/new.go

@@ -1,9 +1,9 @@
-package sqltemplate
+package template
 
 var New = `
-func New{{.upperObject}}Model(conn sqlx.SqlConn, c cache.CacheConf, table string) *{{.upperObject}}Model {
-	return &{{.upperObject}}Model{
-		CachedConn: sqlc.NewConn(conn, c),
+func New{{.upperStartCamelObject}}Model(conn sqlx.SqlConn,{{if .withCache}} c cache.CacheConf,{{end}} table string) *{{.upperStartCamelObject}}Model {
+	return &{{.upperStartCamelObject}}Model{
+		{{if .withCache}}CachedConn: sqlc.NewConn(conn, c){{else}}conn:conn{{end}},
 		table:      table,
 	}
 }