Question

我正忙着使用一个有角度的4.x应用程序，我试图显示一篇随机的维基百科文章。我在查询/页面alwasys下的chrome dev工具中看到的JSON具有不同的nubered pageID。它不是将页面作为数组返回，而是将它作为JSON对象返回，它总是有一个不同的名称，所以我不知道如何将其转换为打字稿界面或绑定到它，因为名称不同？知道我怎么能这样做吗？

我从维基百科api获得的JSON：

{
  "batchcomplete": "",
  "continue": {
    "grncontinue": "0.241230031087|0.241230543855|19422120|0",
    "continue": "grncontinue||"
  },
  "warnings": {
    "extracts": {
      "*": "\"exlimit\" was too large for a whole article extracts request, lowered to 1."
    }
  },
  "query": {
    "pages": {
      "742585": {
        "pageid": 742585,
        "ns": 0,
        "title": "Speedway",
        "extract": "<p><b>Speedway</b> may refer to:</p>\n<h2><span id=\"In_racing\">In racing</span></h2>\n<ul><li>Oval track racing, motor racing on an oval track which turns in one direction</li>\n<li>Cycle speedway, a form of bicycle racing</li>\n<li>Motorcycle speedway, a form of motorcycle sport</li>\n<li>Dirt track racing, known as speedway in Australia and New Zealand</li>\n</ul><h2><span id=\"Other_uses\">Other uses</span></h2>\n<dl><dt>Placenames</dt>\n</dl><ul><li>Speedway, California, former town in Butte County</li>..."
      }
    }
  }
}

Answer 1

使用Object.keys获取Object as Array中的Keys

var data = {
  "batchcomplete": "",
  "continue": {
    "grncontinue": "0.241230031087|0.241230543855|19422120|0",
    "continue": "grncontinue||"
  },
  "warnings": {
    "extracts": {
      "*": "\"exlimit\" was too large for a whole article extracts request, lowered to 1."
    }
  },
  "query": {
    "pages": {
      "742585": {
        "pageid": 742585,
        "ns": 0,
        "title": "Speedway",
        "extract": "<p><b>Speedway</b> may refer to:</p>\n<h2><span id=\"In_racing\">In racing</span></h2>\n<ul><li>Oval track racing, motor racing on an oval track which turns in one direction</li>\n<li>Cycle speedway, a form of bicycle racing</li>\n<li>Motorcycle speedway, a form of motorcycle sport</li>\n<li>Dirt track racing, known as speedway in Australia and New Zealand</li>\n</ul><h2><span id=\"Other_uses\">Other uses</span></h2>\n<dl><dt>Placenames</dt>\n</dl><ul><li>Speedway, California, former town in Butte County</li>..."
      }
    }
  }
};

var MyArray = Object.keys(data.query.pages);

console.log('MyArray: '+ JSON.stringify(MyArray));

// Required Data

console.log('Page: '+ data.query.pages[MyArray[0]].pageid)

Answer 2

您可以使用类似

的javascript Object.keys方法

＆＃13;

var obj={
  "batchcomplete": "",
  "continue": {
    "grncontinue": "0.241230031087|0.241230543855|19422120|0",
    "continue": "grncontinue||"
  },
  "warnings": {
    "extracts": {
      "*": "\"exlimit\" was too large for a whole article extracts request, lowered to 1."
    }
  },
  "query": {
    "pages": {
      "742585": {
        "pageid": 742585,
        "ns": 0,
        "title": "Speedway",
        "extract": "<p><b>Speedway</b> may refer to:</p>\n<h2><span id=\"In_racing\">In racing</span></h2>\n<ul><li>Oval track racing, motor racing on an oval track which turns in one direction</li>\n<li>Cycle speedway, a form of bicycle racing</li>\n<li>Motorcycle speedway, a form of motorcycle sport</li>\n<li>Dirt track racing, known as speedway in Australia and New Zealand</li>\n</ul><h2><span id=\"Other_uses\">Other uses</span></h2>\n<dl><dt>Placenames</dt>\n</dl><ul><li>Speedway, California, former town in Butte County</li>..."
      }
    }
  }
}

var pageNo=Object.keys(obj.query.pages)[0];

console.log(pageNo)

＆＃13;

Answer 3

使用formatversion=2：

action=query&format=json&prop=extracts&exlimit=1&generator=random&formatversion=2

{
    "batchcomplete": true,
    "continue": {
        "grncontinue": "0.451777061970|0.451777269201|12035865|0",
        "continue": "grncontinue||"
    },
    "query": {
        "pages": [
            {
                "pageid": 18652441,
                "ns": 0,
                "title": "Kuczyny",
                "extract": "<p><b>Kuczyny</b> <span>[kuˈt͡ʂɨnɨ]</span> is a village in the administrative district of Gmina Stawiski, within Kolno County, Podlaskie Voivodeship, in north-eastern Poland. It lies approximately 4 kilometres (2 mi) north of Stawiski, 15 km (9 mi) east of Kolno, and 75 km (47 mi) north-west of the regional capital Białystok.</p>\n<p>The village has a population of 31.</p>\n<h2><span id=\"References\">References</span></h2>\n\n<p><br></p>\n\n<p><span></span></p>"
            }
        ]
    }
}

如果json键总是以不同/随机名称返回，如何绑定到json键？

3 个答案: