feat:goctl model mongo add easy flag for easy declare. (#2073)

* fix:typo in readme.md

* feat:`goctl model mongo ` add `easy` flag to generate code with Auto generated CollectionName for easy declare.

* fix:`goctl api doc ` when referenced api file contains no route，will generate an empty markdown file.

* code: adjust code.

Co-authored-by: 虫子樱桃 <czyt@w.cn>

tools/goctl/api/docgen/doc.go

@@ -18,12 +18,14 @@ import (
 var markdownTemplate string
 
 func genDoc(api *spec.ApiSpec, dir, filename string) error {
+	if len(api.Service.Routes()) == 0 {
+		return nil
+	}
 	fp, _, err := util.MaybeCreateFile(dir, "", filename)
 	if err != nil {
 		return err
 	}
 	defer fp.Close()
-
 	var builder strings.Builder
 	for index, route := range api.Service.Routes() {
 		routeComment := route.JoinedDoc()

tools/goctl/model/cmd.go

@@ -83,6 +83,7 @@ func init() {
 
 	mongoCmd.Flags().StringSliceVarP(&mongo.VarStringSliceType, "type", "t", nil, "Specified model type name")
 	mongoCmd.Flags().BoolVarP(&mongo.VarBoolCache, "cache", "c", false, "Generate code with cache [optional]")
+	mongoCmd.Flags().BoolVarP(&mongo.VarBoolEasy, "easy", "e", false, "Generate code with Auto generated CollectionName for easy declare [optional]")
 	mongoCmd.Flags().StringVarP(&mongo.VarStringDir, "dir", "d", "", "The target dir")
 	mongoCmd.Flags().StringVar(&mongo.VarStringStyle, "style", "", "The file naming format, see [https://github.com/zeromicro/go-zero/tree/master/tools/goctl/config/readme.md]")
 	mongoCmd.Flags().StringVar(&mongo.VarStringHome, "home", "", "The goctl home path of the template, --home and --remote cannot be set at the same time, if they are, --remote has higher priority")

tools/goctl/model/mongo/generate/generate.go

@@ -16,6 +16,7 @@ import (
 type Context struct {
 	Types  []string
 	Cache  bool
+	Easy   bool
 	Output string
 	Cfg    *config.Config
 }
@@ -82,7 +83,9 @@ func generateCustomModel(ctx *Context) error {
 		err = util.With("model").Parse(text).GoFmt(true).SaveTo(map[string]interface{}{
 			"Type":      stringx.From(t).Title(),
 			"lowerType": stringx.From(t).Untitle(),
+			"snakeType": stringx.From(t).ToSnake(),
 			"Cache":     ctx.Cache,
+			"Easy":      ctx.Easy,
 		}, output, false)
 		if err != nil {
 			return err

tools/goctl/model/mongo/mongo.go

@@ -19,6 +19,8 @@ var (
 	VarStringDir string
 	// VarBoolCache describes whether cache is enabled.
 	VarBoolCache bool
+	// VarBoolEasy  describes whether to generate Collection Name in the code for easy declare.
+	VarBoolEasy bool
 	// VarStringStyle describes the style.
 	VarStringStyle string
 	// VarStringHome describes the goctl home.
@@ -33,6 +35,7 @@ var (
 func Action(_ *cobra.Command, _ []string) error {
 	tp := VarStringSliceType
 	c := VarBoolCache
+	easy := VarBoolEasy
 	o := strings.TrimSpace(VarStringDir)
 	s := VarStringStyle
 	home := VarStringHome
@@ -71,6 +74,7 @@ func Action(_ *cobra.Command, _ []string) error {
 	return generate.Do(&generate.Context{
 		Types:  tp,
 		Cache:  c,
+		Easy:   easy,
 		Output: a,
 		Cfg:    cfg,
 	})

tools/goctl/model/mongo/template/model_custom.tpl

@@ -5,6 +5,10 @@ package model
     "github.com/zeromicro/go-zero/core/stores/monc"
 ){{else}}import "github.com/zeromicro/go-zero/core/stores/mon"{{end}}
 
+{{if .Easy}}
+    const {{.Type}}CollectionName = "{{.snakeType}}"
+{{end}}
+
 var _ {{.Type}}Model = (*custom{{.Type}}Model)(nil)
 
 type (
@@ -19,10 +23,18 @@ type (
     }
 )
 
+
 // New{{.Type}}Model returns a model for the mongo.
-func New{{.Type}}Model(url, db, collection string{{if .Cache}}, c cache.CacheConf{{end}}) {{.Type}}Model {
+{{if .Easy}}func New{{.Type}}Model(url, db string{{if .Cache}}, c cache.CacheConf{{end}}) {{.Type}}Model {
-    conn := {{if .Cache}}monc{{else}}mon{{end}}.MustNewModel(url, db, collection{{if .Cache}}, c{{end}})
+    conn := {{if .Cache}}monc{{else}}mon{{end}}.MustNewModel(url, db, {{.Type}}CollectionName{{if .Cache}}, c{{end}})
     return &custom{{.Type}}Model{
         default{{.Type}}Model: newDefault{{.Type}}Model(conn),
     }
 }
+{{else}}func New{{.Type}}Model(url, db, collection string{{if .Cache}}, c cache.CacheConf{{end}}) {{.Type}}Model {
+    conn := {{if .Cache}}monc{{else}}mon{{end}}.MustNewModel(url, db, collection{{if .Cache}}, c{{end}})
+    return &custom{{.Type}}Model{
+        default{{.Type}}Model: newDefault{{.Type}}Model(conn),
+    }
+}{{end}}
+