Some improvements:

* Switches to PostgreSQL
* Added Minio storage
* Added attachments to properties
* Introduced DTOs for improved security

src/main/java/de/iwomm/propify_api/entity/Attachment.java

@@ -0,0 +1,72 @@
+package de.iwomm.propify_api.entity;
+
+import jakarta.persistence.*;
+
+import java.time.LocalDateTime;
+import java.util.UUID;
+
+@Entity
+public class Attachment {
+    @Id
+    @GeneratedValue(strategy = GenerationType.UUID)
+    @Column(nullable = false)
+    private UUID id;
+
+    @Column(nullable = false)
+    private String storagePath;
+
+    @Column(nullable = false)
+    private String fileName;
+
+    @ManyToOne()
+    @JoinColumn(name = "property_id")
+    private Property property;
+
+    @Column(nullable = false)
+    private LocalDateTime createdAt;
+
+    @PrePersist
+    protected void onCreate() {
+        this.createdAt = LocalDateTime.now();
+    }
+
+    public LocalDateTime getCreatedAt() {
+        return createdAt;
+    }
+
+    public void setCreatedAt(LocalDateTime createdAt) {
+        this.createdAt = createdAt;
+    }
+
+    public void setProperty(Property property) {
+        this.property = property;
+    }
+
+    public Property getProperty() {
+        return property;
+    }
+
+    public String getStoragePath() {
+        return storagePath;
+    }
+
+    public void setStoragePath(String storagePath) {
+        this.storagePath = storagePath;
+    }
+
+    public UUID getId() {
+        return id;
+    }
+
+    public void setId(UUID id) {
+        this.id = id;
+    }
+
+    public String getFileName() {
+        return fileName;
+    }
+
+    public void setFileName(String fileName) {
+        this.fileName = fileName;
+    }
+}

src/main/java/de/iwomm/propify_api/entity/Property.java

@@ -1,9 +1,9 @@
 package de.iwomm.propify_api.entity;
 
-import jakarta.persistence.Entity;
-import jakarta.persistence.GeneratedValue;
-import jakarta.persistence.Id;
+import jakarta.persistence.*;
 
+import java.time.LocalDateTime;
+import java.util.List;
 import java.util.UUID;
 
 @Entity
@@ -12,16 +12,83 @@ public class Property {
     @GeneratedValue
     private UUID id;
 
+    @Column(nullable = false)
     private String name;
+
+    @Column(nullable = false)
     private String street;
+
+    @Column(nullable = false)
     private String houseNumber;
+
+    @Column(nullable = false)
     private String zipCode;
+
+    @Column(nullable = false)
     private String city;
-    private String country;
+
     private String notes;
 
+    @Column(nullable = false)
+    private String country;
+
+    @OneToMany(mappedBy = "property", orphanRemoval = true)
+    @OrderBy("fileName")
+    private List<Attachment> attachments;
+
+    @Column(nullable = false)
+    private LocalDateTime createdAt;
+
+    private LocalDateTime updatedAt;
+
+    public List<Attachment> getAttachments() {
+        return attachments;
+    }
+
+    public void setAttachments(List<Attachment> attachment) {
+        this.attachments = attachment;
+    }
+
+
     public Property() {}
 
+    public Property(String name, String street, String houseNumber, String zipCode, String city, String country, String notes) {
+        this.name = name;
+        this.street = street;
+        this.houseNumber = houseNumber;
+        this.zipCode = zipCode;
+        this.city = city;
+        this.country = country;
+        this.notes = notes;
+    }
+
+    @PrePersist
+    protected void onCreate() {
+        this.createdAt = LocalDateTime.now();
+        this.updatedAt = LocalDateTime.now();
+    }
+
+    @PreUpdate
+    protected void onUpdate() {
+        this.updatedAt = LocalDateTime.now();
+    }
+
+    public LocalDateTime getCreatedAt() {
+        return createdAt;
+    }
+
+    public void setCreatedAt(LocalDateTime createdAt) {
+        this.createdAt = createdAt;
+    }
+
+    public LocalDateTime getUpdatedAt() {
+        return updatedAt;
+    }
+
+    public void setUpdatedAt(LocalDateTime updatedAt) {
+        this.updatedAt = updatedAt;
+    }
+
     public void setId(UUID id) {
         this.id = id;
     }