diff --git a/src/main/java/tech/ailef/dbadmin/external/controller/DefaultDbAdminController.java b/src/main/java/tech/ailef/dbadmin/external/controller/DefaultDbAdminController.java
index 3705ecf..76c12ec 100644
--- a/src/main/java/tech/ailef/dbadmin/external/controller/DefaultDbAdminController.java
+++ b/src/main/java/tech/ailef/dbadmin/external/controller/DefaultDbAdminController.java
@@ -292,13 +292,15 @@ public class DefaultDbAdminController {
 	public String edit(Model model, @PathVariable String className, @PathVariable String id, RedirectAttributes attr) {
 		DbObjectSchema schema = dbAdmin.findSchemaByClassName(className);
 		
+		Object pkValue = schema.getPrimaryKey().getType().parseValue(id);
+		
 		if (!schema.isEditEnabled()) {
 			attr.addFlashAttribute("errorTitle", "Unauthorized");
 			attr.addFlashAttribute("error", "EDIT operations have been disabled on this type (" + schema.getJavaClass().getSimpleName() + ").");
 			return "redirect:/" + properties.getBaseUrl() + "/model/" + className;
 		}
 		
-		DbObject object = repository.findById(schema, id).orElseThrow(() -> {
+		DbObject object = repository.findById(schema, pkValue).orElseThrow(() -> {
 			return new DbAdminNotFoundException(
 			  "Object " + className + " with id " + id + " not found"
 			);
@@ -449,7 +451,9 @@ public class DefaultDbAdminController {
 				attr.addFlashAttribute("message", "Item created successfully.");
 				saveAction(new UserAction(schema.getTableName(), pkValue, "CREATE", schema.getClassName()));
 			} else {
-				Optional<DbObject> object = repository.findById(schema, pkValue);
+				Object parsedPkValue = schema.getPrimaryKey().getType().parseValue(pkValue);
+
+				Optional<DbObject> object = repository.findById(schema, parsedPkValue);
 				
 				if (!object.isEmpty()) {
 					if (create) {
@@ -458,9 +462,9 @@ public class DefaultDbAdminController {
 						attr.addFlashAttribute("params", params);
 					} else {
 						repository.update(schema, params, files);
-						repository.attachManyToMany(schema, pkValue, multiValuedParams);
+						repository.attachManyToMany(schema, parsedPkValue, multiValuedParams);
 						attr.addFlashAttribute("message", "Item saved successfully.");
-						saveAction(new UserAction(schema.getTableName(), pkValue, "EDIT", schema.getClassName()));
+						saveAction(new UserAction(schema.getTableName(), parsedPkValue.toString(), "EDIT", schema.getClassName()));
 					}
 				} else {
 					Object newPrimaryKey = repository.create(schema, params, files, pkValue);
diff --git a/src/main/java/tech/ailef/dbadmin/external/dbmapping/DbAdminRepository.java b/src/main/java/tech/ailef/dbadmin/external/dbmapping/DbAdminRepository.java
index c6cb128..49f4aed 100644
--- a/src/main/java/tech/ailef/dbadmin/external/dbmapping/DbAdminRepository.java
+++ b/src/main/java/tech/ailef/dbadmin/external/dbmapping/DbAdminRepository.java
@@ -39,6 +39,7 @@ import jakarta.validation.ConstraintViolation;
 import jakarta.validation.ConstraintViolationException;
 import jakarta.validation.Validation;
 import jakarta.validation.Validator;
+import tech.ailef.dbadmin.external.annotations.ReadOnly;
 import tech.ailef.dbadmin.external.dto.FacetedSearchRequest;
 import tech.ailef.dbadmin.external.dto.PaginatedResult;
 import tech.ailef.dbadmin.external.dto.PaginationInfo;
@@ -142,14 +143,18 @@ public class DbAdminRepository {
 	}
 	
 	/**
-	 * Update an existing object with new values
-	 * @param schema
-	 * @param params
+	 * Update an existing object with new values. We don't use the "standard"
+	 * JPA repository save method in this case (like we do on create) because
+	 * we need to handle several edge cases in terms of how missing values
+	 * are handled and also {@linkplain ReadOnly} fields. For this reason, we
+	 * also need to call the validation manually.
+	 * @param schema the schema where we need to update an item
+	 * @param params the String-valued params coming from the HTML form
+	 * @param files the file params coming from the HTML form
 	 */
 	@Transactional("transactionManager")
 	public void update(DbObjectSchema schema, Map<String, String> params, Map<String, MultipartFile> files) {
 		DbObject obj = schema.buildObject(params, files);
-		
 		Validator validator = Validation.buildDefaultValidatorFactory().getValidator();
 		Set<ConstraintViolation<Object>> violations = validator.validate(obj.getUnderlyingInstance());
 		
diff --git a/src/main/java/tech/ailef/dbadmin/external/exceptions/UnsupportedFieldTypeException.java b/src/main/java/tech/ailef/dbadmin/external/exceptions/UnsupportedFieldTypeException.java
index 8383732..f004258 100644
--- a/src/main/java/tech/ailef/dbadmin/external/exceptions/UnsupportedFieldTypeException.java
+++ b/src/main/java/tech/ailef/dbadmin/external/exceptions/UnsupportedFieldTypeException.java
@@ -16,7 +16,6 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
-
 package tech.ailef.dbadmin.external.exceptions;
 
 /**