tp 用group去重

$baseGoodIds_arr = [1,2,3,4,5,6,7,8,9];
$relate_gimgs = D('GoodsImages')->where(['good_id' => ['in',$baseGoodIds_arr]])->limit($gimgs_limit)->group('weight')->select();
dump($relate_gimgs);
 
weight 字段去重复

array(4) {
  [0] => array(5) {
    ["id"] => string(2) "12"
    ["good_id"] => string(1) "7"
    ["resource_name"] => string(23) "1536291421397879873.png"
    ["weight"] => string(1) "0"
    ["create_time"] => string(10) "1536291421"
  }
  [1] => array(5) {
    ["id"] => string(1) "1"
    ["good_id"] => string(1) "1"
    ["resource_name"] => string(22) "153628483559948187.png"
    ["weight"] => string(1) "1"
    ["create_time"] => string(10) "1536284870"
  }
  [2] => array(5) {
    ["id"] => string(2) "13"
    ["good_id"] => string(1) "8"
    ["resource_name"] => string(24) "15362918002142249103.png"
    ["weight"] => string(7) "136155
"
    ["create_time"] => string(10) "1536291800"
  }
  [3] => array(5) {
    ["id"] => string(1) "8"
    ["good_id"] => string(1) "6"
    ["resource_name"] => string(24) "15362922181586297198.png"
    ["weight"] => string(7) "194794
"
    ["create_time"] => string(10) "1536292218"
  }
}