edit to pointer, allowing omitempty

app/migrator/remark_test.go

@@ -25,7 +25,7 @@ func TestRemark_Export(t *testing.T) {
 	c1, err := buf.ReadString('\n')
 	assert.Nil(t, err)
 	log.Print(c1)
-	exp := `{"id":"efbc17f177ee1a1c0ee6e1e025749966ec071adc","pid":"","text":"some text, <a href=\"http://radio-t.com\" rel=\"nofollow\">link</a>","user":{"name":"user name","id":"user1","picture":"","profile":"","admin":false},"locator":{"site":"radio-t","url":"https://radio-t.com"},"score":0,"votes":{},"time":"2017-12-20T15:18:22-06:00","edit":{"time":"0001-01-01T00:00:00Z","summary":""}}` + "\n"
+	exp := `{"id":"efbc17f177ee1a1c0ee6e1e025749966ec071adc","pid":"","text":"some text, <a href=\"http://radio-t.com\" rel=\"nofollow\">link</a>","user":{"name":"user name","id":"user1","picture":"","profile":"","admin":false},"locator":{"site":"radio-t","url":"https://radio-t.com"},"score":0,"votes":{},"time":"2017-12-20T15:18:22-06:00"}` + "\n"
 	assert.Equal(t, exp, c1)
 }
 

app/store/service.go

@@ -56,7 +56,7 @@ func (s *Service) EditComment(locator Locator, commentID string, text string, ed
 	}
 
 	comment.Text = text
-	comment.Edit = edit
+	comment.Edit = &edit
 	comment.Edit.Timestamp = time.Now()
 	comment = sanitizeComment(comment)
 	err = s.Put(locator, comment)

app/store/store.go

@@ -25,7 +25,7 @@ type Comment struct {
 	Votes     map[string]bool `json:"votes"`
 	Timestamp time.Time       `json:"time"`
 	Pin       bool            `json:"pin,omitempty"`
-	Edit      Edit            `json:"edit,omitempty"`
+	Edit      *Edit           `json:"edit,omitempty"`
 }
 
 // Locator keeps site and url of the post