add many to many relationships

src/main/java/ntnu/idatt2016/v233/SmartMat/entity/Recipe.java

 package ntnu.idatt2016.v233.SmartMat.entity;
 
+import java.util.List;
+
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+
 import jakarta.persistence.*;
 import lombok.AllArgsConstructor;
 import lombok.Builder;
 import lombok.Data;
 import lombok.NoArgsConstructor;
+import ntnu.idatt2016.v233.SmartMat.entity.product.Product;
 
 /**
  * Recipe is an entity class representing a recipe in the system.
  *
- * @author Anders
+ * @author Anders & Stian
  * @version 1.0.001
  * @since 19.04.2023
  *
@@ -31,4 +36,12 @@ public class Recipe {
 
     @Column(name = "recipe_description")
     String description;
+    
+    @ManyToMany
+    @JoinTable(name = "recipe_product",
+        joinColumns = @JoinColumn(name = "recipe_id"),
+        inverseJoinColumns = @JoinColumn(name = "ean"))
+    @JsonIgnoreProperties({"recipes"})
+    List<Product> products;
+    
 }

src/main/java/ntnu/idatt2016/v233/SmartMat/entity/product/Product.java

@@ -8,6 +8,7 @@ import lombok.Builder;
 import lombok.Data;
 import lombok.NoArgsConstructor;
 import ntnu.idatt2016.v233.SmartMat.entity.Fridge;
+import ntnu.idatt2016.v233.SmartMat.entity.Recipe;
 
 import java.util.List;
 
@@ -64,4 +65,9 @@ public class Product{
     @ManyToMany(mappedBy = "products")
     @JsonIgnoreProperties({"products"})
     List<Fridge> fridges;
+    
+    @ManyToMany(mappedBy = "products")
+    @JsonIgnoreProperties({"products"})
+    List<Recipe> recipes;
+
 }
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