Added functions for adding, deleting and showing tickets

As said, functions got implemented. Also minor changes to migration
layout and dependencies

backend/src/models.rs

@@ -1,8 +1,9 @@
 use std::fmt::Display;
 
 use serde::{Deserialize, Serialize};
+use sqlx::{Decode, prelude::Type};
 
-#[derive(Clone, Debug, PartialEq, Deserialize, Serialize)]
+#[derive(Clone, Debug, PartialEq, Deserialize, Serialize, Decode, Type)]
 pub enum Category {
     WhiteboardBeamer,
     Internet,
@@ -25,7 +26,7 @@ impl Display for Category {
     }
 }
 
-#[derive(Clone, Debug, PartialEq, Deserialize, Serialize)]
+#[derive(Clone, Debug, PartialEq, Deserialize, Serialize, Decode, Type)]
 pub enum Status {
     ToDo,
     InProgress,
@@ -56,6 +57,18 @@ pub struct Ticket {
     pub user_id: i16,
 }
 
+#[derive(Deserialize, Serialize, Debug, PartialEq)]
+pub struct TicketResponse {
+    pub id: i32,
+    pub category: Category,
+    pub betreff: String,
+    pub description: String,
+    pub room: i16,
+    pub status: Status,
+    pub date: chrono::NaiveDateTime,
+    pub user_id: i16,
+}
+
 #[derive(Deserialize, Serialize, PartialEq, Debug)]
 pub struct User {
     pub id: i16,