Question

我有一个以下JSON，通过选择过滤器来执行搜索：

{
  "Books": [
     {
        "title": "Book 1",
        "binding": "paperback",
        "category": "pop",
        "language": "english",
        "author": "male"
     },
     {
        "title": "Book 2",
        "binding": "hardcover",
        "category": "pop rock,electro pop",
        "language": "french",
        "author": "female"
     },
     {
        "title": "Book 3",
        "binding": "audiobook",
        "category": "soft rock",
        "language": "german",
        "author": "male,female"
     },
     {
        "title": "Book 4",
        "binding": "boxed set",
        "category": "rock,classic rock",
        "language": "english",
        "author": "female,male"
     },
     {
        "title": "Book 5",
        "binding": "paperback",
        "category": "electro pop,rock,classic rock",
        "language": "french",
        "author": "male/female"
     },
     {
        "title": "Book 6",
        "binding": "paperback",
        "category": "rock",
        "language": "french",
        "author": "male"
     }
  ]
}

可用的过滤器

Binding
  -Paperback
  -Hardcover
  -Audiobook
  -Boxed Set

Category
  -Classic Rock
  -Pop
  -Pop Rock
  -Electro Pop
  -Soft Rock
  -Rock

Language
  -German
  -English
  -French

Author
  -Male
  -Female
  -Male/Female

我正在使用defiant.js从JSON进行搜索。当我使用以下查询时：

var thequery = [];
for (var i in searchTags) {
    for (var j = 0; j < searchTags[i].length; j++) {
        thequery.push('contains(' + i + ' ,"' + searchTags[i][j] + '")');   
    }
}
var thequeryString = thequery.join(' and ');
console.log('//*[' + firstqueryString + ']');
return '//*[' + thequeryString + ']';

因此，当我第一次点击绑定过滤器时，我得到的查询是//*[contains(binding ,"paperback")]，当我第二次点击时，返回的查询为//*[contains(binding ,"paperback") and contains(binding ,"boxed set")]，然后这会正确过滤结果。

但现在的问题是，如果我想获得具有类型pop的图书然后使用查询//*[contains(category ,"rock")]我得到

第2册
第3册
第4册
第5册
第6册

但实际上只有第4册，第5册和第6册有 Rock 类别。

我尝试的另一个问题是：

var thequery = [];
for (var i in searchTags) {
    for (var j = 0; j < searchTags[i].length; j++) {
        if(i == 'author' || i == 'category'){ 
            thequery.push(i + '[contains(.,"' + searchTags[i][j] + ',")] or ' + i + '[contains(.,",' + searchTags[i][j] + '")] or ' + i + '="' + searchTags[i][j] + '"');
        }else{
            thequery.push('contains(' + i + ' ,"' + searchTags[i][j] + '")'); 
        }
    }
}
var thequeryString = thequery.join(' and ');
console.log('//*[' + firstqueryString + ']');
return '//*[' + thequeryString + ']';

我得到的查询是//*[category[contains(.,"rock,")] or category[contains(.,", rock")] or category ="rock"]，它返回：

第2册
第4册
第5册
第6册

我能得到的最近的就是这里。

所以，总结一下我有两个问题：

如何使用我点击的精确过滤器过滤图书。例如。如果我单击Rock，则只返回包含类别rock的Books。
如果我使用//*[category[contains(.,"rock,")] or category[contains(.,", rock")] or category ="rock"]并将其与主 thequeryString 与and一起加入，则它不会过滤掉正确的结果，因为第一个包含或即可。

请帮忙。

注意：defiantjs也有一个＆＃34; XPath评估员＆＃34;你可以在哪里检查查询。

Answer 1

使用forEach迭代数组并使用indexOf查找该键中是否存在所需的值

var m = {
  "Books": [{
      "title": "Book 1",
      "binding": "paperback",
      "category": "pop",
      "language": "english",
      "author": "male"
    },
    {
      "title": "Book 2",
      "binding": "hardcover",
      "category": "pop rock,electro pop",
      "language": "french",
      "author": "female"
    },
    {
      "title": "Book 3",
      "binding": "audiobook",
      "category": "soft rock",
      "language": "german",
      "author": "male,female"
    },
    {
      "title": "Book 4",
      "binding": "boxed set",
      "category": "rock,classic rock",
      "language": "english",
      "author": "female,male"
    },
    {
      "title": "Book 5",
      "binding": "paperback",
      "category": "electro pop,rock,classic rock",
      "language": "french",
      "author": "male/female"
    },
    {
      "title": "Book 6",
      "binding": "paperback",
      "category": "rock",
      "language": "french",
      "author": "male"
    }
  ]
}




// a function which accepts key which is one of binding,category,language,author.
// the array will be filtered on this key
function getFilteredElement(key, value) {
    var bookFilter = [];
    m.Books.forEach(function(item){
       var getFilterField = item[key];
       // since the value is a string, so splitting it and creating an array
       var keyArray = item[key].split(',');
       // now checking if the passed value has a presence in the  above array
       if (keyArray.indexOf(value) !== -1) {
           // if present pushed the book name
           bookFilter.push(item.title);
       }
   });
    // returning the array of books
    return bookFilter;
}

console.log(getFilteredElement('category', 'rock'))

使用带有精确标记的Javascript搜索JSON

1 个答案: