added feature: That no loan can be deleted and edited changelog accordingly

backendV2/routes/admin/database/loanDataMgmt.database.js

@@ -17,7 +17,10 @@ export const getAllLoans = async () => {
 };
 
 export const deleteLoanById = async (loanId) => {
-  const [result] = await pool.query("DELETE FROM loans WHERE id = ?", [loanId]);
+  const [result] = await pool.query(
+    "UPDATE loans SET deleted = true, deleted_admin = true WHERE id = ?",
+    [loanId],
+  );
   if (result.affectedRows > 0) return { success: true };
   return { success: false };
 };

backendV2/schemeV2.sql

@@ -27,6 +27,7 @@ CREATE TABLE loans (
   loaned_items_id json NOT NULL DEFAULT ('[]'),
   loaned_items_name json NOT NULL DEFAULT ('[]'),
   deleted bool NOT NULL DEFAULT false,
+  deleted_admin bool NOT NULL DEFAULT false,
   note varchar(500) DEFAULT NULL,
   PRIMARY KEY (id),
   CHECK (loan_code REGEXP '^[0-9]{6}$')

changelog.md

@@ -11,9 +11,10 @@ This update provides some new features for the design. It also contains some imp
 
 ## Improvements
 
-- The overview page now has the note column and is overall better organised
+- The overview page now shows the note column and is overall better organised.
-- I have the error logging for the API route wehre you can take loans improved.
+- Improved error logging
 - If you try to delete a loan that has not been returned yet, you will get an 507 error code.
+- When the admin deletes a loan, the loan will be still visible in the database, but it will be marked as deleted. This is to prevent data loss and to keep track of deleted loans.
 
 ## Fixed bugs