Fix numeric values not being quoted for MySQL set columns.

Set columns should always have their values quoted. Not quoting values
makes MySQL do bad things.

Refs #5649

lib/Cake/Model/Datasource/Database/Mysql.php

@@ -795,6 +795,17 @@ public function column($real) {
 		return 'text';
 	}
 
+/**
+ * {@inheritDoc}
+ */
+	public function value($data, $column = null) {
+		$value = parent::value($data, $column);
+		if (is_numeric($value) && substr($column, 0, 3) === 'set') {
+			return $this->_connection->quote($value);
+		}
+		return $value;
+	}
+
 /**
  * Gets the schema name
  *

lib/Cake/Model/Datasource/DboSource.php

@@ -354,8 +354,10 @@ public function value($data, $column = null) {
 					return str_replace(',', '.', strval($data));
 				}
 				if ((is_int($data) || $data === '0') || (
-					is_numeric($data) && strpos($data, ',') === false &&
-					$data[0] != '0' && strpos($data, 'e') === false)
+					is_numeric($data) &&
+					strpos($data, ',') === false &&
+					$data[0] != '0' &&
+					strpos($data, 'e') === false)
 				) {
 					return $data;
 				}

lib/Cake/Test/Case/Model/Datasource/Database/MysqlTest.php

@@ -553,6 +553,10 @@ public function testColumn() {
 		$result = $this->Dbo->column('decimal(14,7) unsigned');
 		$expected = 'decimal';
 		$this->assertEquals($expected, $result);
+
+		$result = $this->Dbo->column("set('a','b','c')");
+		$expected = "set('a','b','c')";
+		$this->assertEquals($expected, $result);
 	}
 
 /**
@@ -4071,4 +4075,21 @@ public function testNestedTransaction() {
 		$this->Dbo->useNestedTransactions = $nested;
 	}
 
+/**
+ * Test that value() quotes set values even when numeric.
+ *
+ * @return void
+ */
+	public function testSetValue() {
+		$column = "set('a','b','c')";
+		$result = $this->Dbo->value('1', $column);
+		$this->assertEquals("'1'", $result);
+
+		$result = $this->Dbo->value(1, $column);
+		$this->assertEquals("'1'", $result);
+
+		$result = $this->Dbo->value('a', $column);
+		$this->assertEquals("'a'", $result);
+	}
+
 }