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/import.go

@@ -1,15 +1,28 @@
-package sqltemplate
+package template
 
-var Imports = `
-import (
-	{{if .containsCache}}"database/sql"
-	"fmt"{{end}}
+var (
+	Imports = `import (
+	"database/sql"
+	"fmt"
 	"strings"
 	"time"
 
-    "github.com/tal-tech/go-zero/core/stores/cache"
+	"github.com/tal-tech/go-zero/core/stores/cache"
 	"github.com/tal-tech/go-zero/core/stores/sqlc"
 	"github.com/tal-tech/go-zero/core/stores/sqlx"
 	"github.com/tal-tech/go-zero/core/stringx"
+	"github.com/tal-tech/go-zero/tools/goctl/model/sql/builderx"
 )
 `
+	ImportsNoCache = `import (
+	"database/sql"
+	"strings"
+	"time"
+
+	"github.com/tal-tech/go-zero/core/stores/sqlc"
+	"github.com/tal-tech/go-zero/core/stores/sqlx"
+	"github.com/tal-tech/go-zero/core/stringx"
+	"github.com/tal-tech/go-zero/tools/goctl/model/sql/builderx"
+)
+`
+)