我收到此错误＆＃34;无法读取null＆＃34;的属性RDF对于这部分代码

Question

request(url, function(err, resp, body) {

＆＃13;

＆＃13;

   

    request(url, function(err, resp, body) {
        		body = JSON.parse(body);
        		// logic used to compare search results with the input from user
        		// console.log(!body.query.results.RDF.item['about'])
        		if (!body.query.results.RDF.item) {
        		  craig = "No results found. Try again.";
        		} else {
        			results = body.query.results.RDF.item[0]['about']
        	    craig = '<a href ="'+results+'">'+results+'</a>'
        	  }
        	  // pass back the results to client side
        		res.send(craig);
        	});
        
        });

＆＃13;

＆＃13;

＆＃13;

});

Answer 1

错误本身很容易诊断;返回的 body.query.results 为空。看一下请求功能，找出为什么 body.query 没有您要查找的结果属性。