cbsnexora-backend/CUSTOM_FIELDS_IMPLEMENTATION_SUMMARY.md

# SavingsProduct Custom Fields - Implementation Summary

## ✅ Completed Changes

### 1. **Validator Updates**
**File:** `fineract-savings/src/main/java/org/apache/fineract/portfolio/savings/data/SavingsProductDataValidator.java`

**Changes:**
- Added `balanceFrequency` to `SAVINGS_PRODUCT_REQUEST_DATA_PARAMETERS` whitelist
- Added `accountClosedZeroBalanceInDayClosing` to `SAVINGS_PRODUCT_REQUEST_DATA_PARAMETERS` whitelist

### 2. **API Constants**
**File:** `fineract-core/src/main/java/org/apache/fineract/portfolio/savings/SavingsApiConstants.java`

**Changes:**
```java
public static final String balanceFrequencyParamName = "balanceFrequency";
public static final String accountClosedZeroBalanceInDayClosingParamName = "accountClosedZeroBalanceInDayClosing";
```

### 3. **Entity (Domain Model)**
**File:** `fineract-savings/src/main/java/org/apache/fineract/portfolio/savings/domain/SavingsProduct.java`

**Changes:**
- Added field: `@Column(name = "balance_frequency", length = 50) private String balanceFrequency;`
- Added field: `@Column(name = "account_closed_zero_balance_in_day_closing") private Boolean accountClosedZeroBalanceInDayClosing = false;`
- Added getters: `getBalanceFrequency()`, `getAccountClosedZeroBalanceInDayClosing()`
- Added setters: `setBalanceFrequency()`, `setAccountClosedZeroBalanceInDayClosing()`
- Added update logic in `update()` method to handle changes to these fields

### 4. **Assembler**
**File:** `fineract-savings/src/main/java/org/apache/fineract/portfolio/savings/domain/SavingsProductAssembler.java`

**Changes:**
```java
if (command.parameterExists("balanceFrequency")) {
    product.setBalanceFrequency(command.stringValueOfParameterNamed("balanceFrequency"));
}
if (command.parameterExists("accountClosedZeroBalanceInDayClosing")) {
    product.setAccountClosedZeroBalanceInDayClosing(command.booleanObjectValueOfParameterNamed("accountClosedZeroBalanceInDayClosing"));
}
```

### 5. **DTO (Data Transfer Object)**
**File:** `fineract-core/src/main/java/org/apache/fineract/portfolio/savings/data/SavingsProductData.java`

**Changes:**
```java
@Getter @Setter private String balanceFrequency;
@Getter @Setter private Boolean accountClosedZeroBalanceInDayClosing;
```

### 6. **Read Platform Service**
**File:** `fineract-provider/src/main/java/org/apache/fineract/portfolio/savings/service/SavingsProductReadPlatformServiceImpl.java`

**Changes:**
- SQL Query: Added `sp.balance_frequency as balanceFrequency`
- SQL Query: Added `sp.account_closed_zero_balance_in_day_closing as accountClosedZeroBalanceInDayClosing`
- ResultSet mapping: Added extraction of both fields

### 7. **Database Migration**
**File:** `database_migration_add_custom_fields.sql`

```sql
ALTER TABLE m_savings_product 
ADD COLUMN balance_frequency VARCHAR(50) DEFAULT NULL,
ADD COLUMN account_closed_zero_balance_in_day_closing BOOLEAN DEFAULT FALSE;
```

---

## 📋 What These Fields Do

### **balanceFrequency** (String)
- **Purpose:** Defines how often balance is calculated/checked
- **Example Values:** "Daily", "Monthly", "Quarterly", "Yearly"
- **Database Column:** `m_savings_product.balance_frequency`
- **Type:** VARCHAR(50)

### **accountClosedZeroBalanceInDayClosing** (Boolean)
- **Purpose:** Flag to automatically close accounts when balance reaches zero at day end
- **Example Values:** `true` or `false`
- **Default:** `false`
- **Database Column:** `m_savings_product.account_closed_zero_balance_in_day_closing`
- **Type:** BOOLEAN

---

## 🎯 API Usage

### **POST /v1/savingsproducts** (Create)
```json
{
  "name": "Saving Product",
  "shortName": "SD22",
  // ... other fields ...
  "balanceFrequency": "Monthly",
  "accountClosedZeroBalanceInDayClosing": true,
  // ... rest of fields ...
}
```

### **GET /v1/savingsproducts/{productId}** (Read)
Response will include:
```json
{
  "id": 1,
  "name": "Saving Product",
  // ... other fields ...
  "balanceFrequency": "Monthly",
  "accountClosedZeroBalanceInDayClosing": true,
  // ... rest of fields ...
}
```

### **PUT /v1/savingsproducts/{productId}** (Update)
```json
{
  "balanceFrequency": "Quarterly",
  "accountClosedZeroBalanceInDayClosing": false
}
```

---

## 🗄️ Database Migration Steps

Run this SQL script to add the columns:

```bash
mysql -u root -p your_database < database_migration_add_custom_fields.sql
```

Or manually execute:
```sql
ALTER TABLE m_savings_product 
ADD COLUMN balance_frequency VARCHAR(50) DEFAULT NULL,
ADD COLUMN account_closed_zero_balance_in_day_closing BOOLEAN DEFAULT FALSE;
```

---

## ✅ Validation

The fields are now:
- ✅ **Accepted** in CREATE request (POST)
- ✅ **Saved** to database
- ✅ **Returned** in GET response
- ✅ **Updatable** via PUT request
- ✅ **Validated** (no longer rejected as unsupported)

---

## 🚀 Next Steps

1. **Run Database Migration:** Execute the SQL script
2. **Rebuild Application:** `./gradlew clean build`
3. **Restart Server:** Apply the changes
4. **Test API:** Use your payload to create a savings product

---

## 📝 Notes

- Both fields are **optional** (nullable)
- `balanceFrequency` accepts any string value (you can add validation later if needed)
- `accountClosedZeroBalanceInDayClosing` defaults to `false` if not provided
- Both fields support **partial updates** (you can update just one of them)