Made some improvements to the dietary preference handling, but CanteenOfferPageAdapter.kt still needs some work for the filtering to work properly; it should only filter out elements if they meet NO preferences!

app/src/main/java/com/denizk0461/studip/model/CanteenOffer.kt

@@ -1,9 +1,11 @@
 package com.denizk0461.studip.model
 
+import androidx.room.ColumnInfo
+
 //@Entity(tableName = "offers")
 data class CanteenOffer(
 //    @PrimaryKey val id: Int,
-    val id: Int,
+    val itemId: Int,
     val date: String,
     val dateId: Int,
     val category: String,
@@ -12,14 +14,5 @@ data class CanteenOffer(
     val canteenId: Int,
     val title: String,
     val price: String, // price for students
-    val isFair: Boolean, // artgerechte Tierhaltung
-    val isFish: Boolean, // Fisch
-    val isPoultry: Boolean, // Geflügel
-    val isLamb: Boolean, // Lamm
-    val isVital: Boolean, // mensaVital
-    val isBeef: Boolean, // Rindfleisch
-    val isPork: Boolean, // Schweinefleisch
-    val isVegan: Boolean, // plant-based (vegan)
-    val isVegetarian: Boolean, // vegetarisch
-    val isGame: Boolean, // Wild
+    @ColumnInfo(name = "dietary_preferences") val dietaryPreferences: String,
 )