sort() public method

If sorting by multiple fields, the first argument should be an array of field name (key) and order (value) pairs. This is useful in conjunction with {@link Expr::each()} for a {@link Expr::push()} operation. {@link Builder::sort()} should be used to sort the results of a query.
See also: http://docs.mongodb.org/manual/reference/operator/sort/
public sort ( array | string $fieldName, integer | string $order = null )
$fieldName array | string Field name or array of field/order pairs
$order integer | string Field order (if one field is specified)
Expr Class Documentation
示例#1
0
文件： ExprTest.php 项目： im286er/ent 
 public function testPushWithExpressionShouldEnsureEachOperatorAppearsFirst()
 {
     $expr = new Expr();
     $innerExpr = new Expr();
     $innerExpr->sort('x', 1)->slice(-2)->each(array(array('x' => 1), array('x' => 2)));
     $expectedNewObj = array('$push' => array('a' => array('$each' => array(array('x' => 1), array('x' => 2)), '$sort' => array('x' => 1), '$slice' => -2)));
     $this->assertSame($expr, $expr->field('a')->push($innerExpr));
     $this->assertSame($expectedNewObj, $expr->getNewObj());
 }