基于另一个json文件从json文件角度读取数据

I'm new to angular and have run into a scenario where I don't know the best way to setup this code.

我是角色的新手,遇到了一个我不知道设置此代码的最佳方法的场景。

I have 2 JSON files:

我有2个JSON文件:

images.json

{
    "imageName":        "example.jpg",
    "imageTags":        ["fun","work","utility"]
    "productID":        ["item1","item3"]
}

products.json

{
    "productID":        "item1",
    "productName":      "Staple Gun",
    "productURL":       "Staple-Gun.htm"
}

I don't have any code yet, I'm really trying to make sure I build this properly first.

我还没有任何代码,我真的想确保我先正确地构建它。

My goal is to pull images based on tags, so I put a filter on the first ng-repeat portion. This portion works well. But I want to be able to link to the products that are in the images. The easiest thing I found was to do a ng-repeat with the productID as a filter, but if I am pulling 50 photos and each photo has 2 items, that is a ton of repeats. It seems to me that this would require a ton of resources. Is this the best way or is there a better way to handle this?

我的目标是基于标签来提取图像,因此我在第一个ng-repeat部分放置了一个过滤器。这部分效果很好。但我希望能够链接到图像中的产品。我找到的最简单的事情是使用productID作为过滤器进行ng-repeat,但如果我要拉50张照片并且每张照片有2个项目,那就是大量的重复。在我看来,这将需要大量的资源。这是最好的方式还是有更好的方法来处理这个问题?

Code example:

<div ng-repeat="photo in photos | filter: 'fun'">
   <img ng-src="{{ photo.imageName }}">
   <span>Products In This Image</span>
   <div ng-repeat="product in products | filter: photo.productID">
       <a ng-href="{{ product.productURL }}" title="{{ product.productName }}">{{ product.productName }}</a>
   </div>
</div>

1 个解决方案

#1

A simple mapping of the products to an object that uses the productID as keys would be much more efficient

将产品简单映射到使用productID作为键的对象将更加高效

$scope.product_map = {};
products.forEach(function(item) {
  $scope.product_map[item.productID] = item
});

Will produce:

{
  "item1": {
    "productID": "item1",
    "productName": "Staple Gun",
    "productURL": "Staple-Gun.htm"
  }
}

This means instead of having to filter a whole array each time you need to look up a product you can simply do:

这意味着您无需在每次需要查找产品时过滤整个数组,而只需执行以下操作:

var productNeeded = $scope.product_map['item1'];

In the view this would translate to:

在视图中,这将转化为:

<div ng-repeat="photo in photos | filter: 'fun'">
   <img ng-src="{{ photo.imageName }}">
   <span>Products In This Image</span>
    <!-- iterate small array of productID's in photo object -->
   <div ng-repeat="id in photo.productID">
       <!-- product_map[id] is a single object reference -->
       <a ng-href="{{ product_map[id].productURL }}" title="{{ product_map[id].productName }}">{{ product_map[id].productName }}</a>
   </div>
</div>

#1