# Recipe Table Migration Summary

## Database Schema Change
The Recipes table primary key column was renamed:
- **Old**: `id`
- **New**: `rid`

All related tables (recipe_ingredients, recipe_categories, reviews) still use `recipe_id` as the foreign key column name (they store the recipe's `rid` value).

## Files Updated

### 1. loggedin.php
- **Line 46**: Changed `$row['id']` → `$row['rid']` 
  - Affects: Recipe link generation in the listing
- **Lines 28-31**: Added error handling for SQL query failures
  - Shows database errors in DEBUG mode for troubleshooting

### 2. view_recipe.php
- **Line 29**: Changed `WHERE id = $recipe_id` → `WHERE rid = $recipe_id`
  - Affects: Permission check for recipe deletion
- **Line 41**: Changed `WHERE id = $recipe_id` → `WHERE rid = $recipe_id`
  - Affects: Recipe deletion query
- **Line 50**: Changed `WHERE id = $recipe_id` → `WHERE rid = $recipe_id`
  - Affects: Main recipe fetch query
- **Lines 51-58**: Enhanced error handling with detailed messages
  - Distinguishes between connection errors and missing recipes
  - Shows recipe ID in DEBUG mode for troubleshooting

### 3. create_recipe.php
- **Lines 31-44**: Added error handling for INSERT operation
  - Catches and reports database errors in DEBUG mode
  - Prevents silent failures

## No Changes Required (Verified Correct)
- Junction table queries using `recipe_id` (these columns store the recipe ID value)
- Ingredients table access using `id` (Ingredients table was not affected)
- Categories table access using `id` (Categories table was not affected)
- Users table access using `id` (Users table was not affected)
- `mysqli_insert_id()` usage (automatically gets the new rid value)

## Important Notes for Deployment

1. **File Sync**: Ensure all PHP files are uploaded to the server
2. **Database Verification**: Confirm the Recipes table has `rid` as the primary key with AUTO_INCREMENT
3. **Error Logging**: With DEBUG = TRUE, any database issues will be displayed
4. **Testing**: After deployment:
   - Verify recipes are displayed on loggedin.php
   - Click on a recipe to view view_recipe.php
   - Create a new recipe via create_recipe.php
   - Delete a recipe (if authorized)

## URL Parameters
- Recipe links still use `?id=value` in the URL (parameter name unchanged)
- The value passed is the recipe's `rid` value from the database