fixed the testcases for the feedback

server/backend/cron/email_templates/feedback_body.gohtml

@@ -1,7 +1,7 @@
 <h1>Feedback via TumCampusApp:</h1>
-{{ if .Feedback.Valid -}}
+{{ if .Feedback -}}
 <blockquote>
-    {{- .Feedback.String -}}
+    {{- .Feedback -}}
 </blockquote>
 {{- else -}}
 <i>no feedback provided</i>

server/backend/cron/email_templates/feedback_body.txt.tmpl

@@ -1,7 +1,7 @@
 Feedback via TumCampusApp:
 
-{{ if .Feedback.Valid }}
-{{- .Feedback.String -}}
+{{ if .Feedback }}
+{{- .Feedback -}}
 {{ else -}}
 no feedback provided
 {{- end }}

server/backend/cron/feedback_email.go

@@ -58,10 +58,10 @@ func messageWithHeaders(feedback *model.Feedback) *gomail.Message {
 	// From
 	m.SetAddressHeader("From", os.Getenv("SMTP_USERNAME"), "TUM Campus App")
 	// To
-	if feedback.Recipient.Valid {
-		m.SetHeader("To", feedback.Recipient.String)
+	if feedback.Recipient != "" {
+		m.SetHeader("To", feedback.Recipient)
 	} else {
-		m.SetHeader("To", "[email protected]")
+		m.SetHeader("To", "[email protected]") // should not ever happen as checked in the api
 	}
 	// ReplyTo
 	if feedback.ReplyTo.Valid {

server/backend/cron/feedback_email_test.go

@@ -23,10 +23,10 @@ func TestIterate(t *testing.T) {
 
 func fullFeedback() *model.Feedback {
 	return &model.Feedback{
-		EmailId:    null.StringFrom("magic-id"),
-		Recipient:  null.StringFrom("tca"),
+		EmailId:    "magic-id",
+		Recipient:  "tca",
 		ReplyTo:    null.StringFrom("[email protected]"),
-		Feedback:   null.StringFrom("This is a Test"),
+		Feedback:   "This is a Test",
 		ImageCount: 1,
 		Latitude:   null.FloatFrom(0),
 		Longitude:  null.FloatFrom(0),
@@ -38,10 +38,10 @@ func fullFeedback() *model.Feedback {
 
 func emptyFeedback() *model.Feedback {
 	return &model.Feedback{
-		EmailId:    null.String{},
-		Recipient:  null.String{},
+		EmailId:    "",
+		Recipient:  "",
 		ReplyTo:    null.String{},
-		Feedback:   null.String{},
+		Feedback:   "",
 		ImageCount: 0,
 		Latitude:   null.Float{},
 		Longitude:  null.Float{},
@@ -56,7 +56,7 @@ func TestHeaderInstantiationWithFullFeedback(t *testing.T) {
 	fb := fullFeedback()
 	m := messageWithHeaders(fb)
 	assert.Equal(t, []string{`"TUM Campus App" <[email protected]>`}, m.GetHeader("From"))
-	assert.Equal(t, []string{fb.Recipient.String}, m.GetHeader("To"))
+	assert.Equal(t, []string{fb.Recipient}, m.GetHeader("To"))
 	assert.Equal(t, []string{"[email protected]"}, m.GetHeader("Reply-To"))
 	assert.Equal(t, []string{fb.Timestamp.Time.Format(time.RFC1123Z)}, m.GetHeader("Date"))
 	assert.Equal(t, []string{"Feedback via Tum Campus App"}, m.GetHeader("Subject"))