Merge branch 'santalla/devel'

Author: nadiamoe

generator/cli/kallax/cmd/gen.go

@@ -6,6 +6,7 @@ import (
 
 	"gopkg.in/src-d/go-kallax.v1/generator"
 	cli "gopkg.in/urfave/cli.v1"
+	"os"
 )
 
 var Generate = cli.Command{
@@ -44,6 +45,13 @@ func generateAction(c *cli.Context) error {
 		return fmt.Errorf("kallax: Input path should be a directory %s", input)
 	}
 
+	var foundPrevious bool
+	if _, err = os.Stat(output); err == nil {
+		foundPrevious = true
+		fmt.Fprintf(os.Stderr, "NOTE: Previous generated file `%s` found, renaming to `%s`\n", output, output+".old")
+		err = os.Rename(output, output+".old")
+	}
+
 	p := generator.NewProcessor(input, excluded)
 	pkg, err := p.Do()
 	if err != nil {
@@ -56,5 +64,10 @@ func generateAction(c *cli.Context) error {
 		return err
 	}
 
+	if foundPrevious {
+		fmt.Fprintf(os.Stderr, "NOTE: Generation succeded, removing `%s`\n", output+".old")
+		os.Remove(output + ".old")
+	}
+
 	return nil
 }

generator/templates/model.tgo

@@ -118,6 +118,16 @@ func (s *{{.StoreName}}) DebugWith(logger kallax.LoggerFunc) *{{.StoreName}} {
         return &{{.StoreName}}{s.Store.DebugWith(logger)}
 }
 
+// DisableCacher turns off prepared statements, which can be useful in some scenarios.
+func (s *{{.StoreName}}) DisableCacher() *{{.StoreName}} {
+        return &{{.StoreName}}{s.Store.DisableCacher()}
+}
+
+// DisableCacher turns on prepared statements. This is the default.
+func (s *{{.StoreName}}) EnableCacher() *{{.StoreName}} {
+        return &{{.StoreName}}{s.Store.EnableCacher()}
+}
+
 {{if .HasNonInverses}}
 func (s *{{.StoreName}}) relationshipRecords(record *{{.Name}}) []modelSaveFunc {
         var result []modelSaveFunc

store.go

@@ -159,7 +159,7 @@ func (s *Store) DebugWith(logger LoggerFunc) *Store {
 	}).init()
 }
 
-// DisableCacher turns off prepared statements.
+// DisableCacher turns off prepared statements, which can be useful in some scenarios.
 func (s *Store) DisableCacher() *Store {
 	return (&Store{
 		db:        s.db,