Merge pull request mavinoo#56 from WalterWoshid/master

Added increment / decrement functionality

Author: mavinoo

README.md

@@ -74,6 +74,39 @@ $index = 'id';
 Batch::update($userInstance, $value, $index);
 ```
 
+# Example Increment / Decrement
+
+```php
+use App\Models\User;
+
+$userInstance = new User;
+$value = [
+ [
+ 'id' => 1,
+ 'balance' => '+500' // Add
+ ] ,
+ [
+ 'id' => 2,
+ 'balance' => '-200' // Subtract
+ ] ,
+ [
+ 'id' => 3,
+ 'balance' => '*5' // Multiply
+ ] ,
+ [
+ 'id' => 4,
+ 'balance' => '/2' // Divide
+ ] ,
+ [
+ 'id' => 5,
+ 'balance' => '%2' // Modulo
+ ] ,
+];
+$index = 'id';
+
+Batch::update($userInstance, $value, $index);
+```
+
 # Example Insert
 
 ```php

src/Batch.php

@@ -73,8 +73,12 @@ public function update(Model $table, array $values, string $index = null, bool $
 
  foreach (array_keys($val) as $field) {
  if ($field !== $index) {
- $finalField = $raw ? Common::mysql_escape($val[$field]) : "'" . Common::mysql_escape($val[$field]) . "'";
- $value = (is_null($val[$field]) ? 'NULL' : $finalField);
+ if (gettype($val[$field]) == 'string' && !empty($val[$field]) && str_replace(['+', '-', '*', '/', '%'], '', $val[$field][0]) !== $val[$field][0]) {
+ $value = '`' . $field . '`' . $val[$field];
+ } else {
+ $finalField = $raw ? Common::mysql_escape($val[$field]) : "'" . Common::mysql_escape($val[$field]) . "'";
+ $value = (is_null($val[$field]) ? 'NULL' : $finalField);
+ }
  if ($driver == 'pgsql')
  $final[$field][] = 'WHEN ' . $index . ' = \'' . $val[$index] . '\' THEN ' . $value . ' ';
  else