add custom js functions for templates

examples/custom-js-functions/templates/model.tmpl

@@ -0,0 +1,44 @@
+package models
+
+import (
+	"errors"
+	"time"
+	"github.com/google/uuid"
+)
+
+{{formatComment (printf "Model for %s entity\nGenerated with custom JavaScript functions" .Entity.Name)}}
+type {{.Entity.Name | title}} struct {
+{{- range .Entity.Fields}}
+	{{.Name | title}} {{goType .Type}} {{dbFieldMapping .Name .Type}}
+{{- end}}
+}
+
+{{formatComment "Table name for GORM"}}
+func ({{.Entity.Name | title}}) TableName() string {
+	return "{{pluralize (.Entity.Name | lower)}}"
+}
+
+{{formatComment "Validation function using custom JavaScript validation rules"}}
+func (m *{{.Entity.Name | title}}) Validate() error {
+{{- range .Entity.Fields}}
+	{{- if .Required}}
+	{{generateValidation .Type .Name}}
+	{{- end}}
+{{- end}}
+	return nil
+}
+
+{{formatComment "Create a new instance with validation"}}
+func New{{.Entity.Name | title}}({{range $i, $field := .Entity.Fields}}{{if $i}}, {{end}}{{$field.Name | lower}} {{goType $field.Type}}{{end}}) (*{{.Entity.Name | title}}, error) {
+	model := &{{.Entity.Name | title}}{
+{{- range .Entity.Fields}}
+		{{.Name | title}}: {{.Name | lower}},
+{{- end}}
+	}
+
+	if err := model.Validate(); err != nil {
+		return nil, err
+	}
+
+	return model, nil
+}