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POCollect data recursively in nodejs and then delete it one by one
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  1. POCollect data recursively in nodejs and then delete it one by one
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    copied!<p>infom_col is a collection which contains a field rkey which itself contains an array like this: rkeys -> brands so brands is an array of ids. These ids are reference to other documents in the collection. I need to collect all such dependent ids and delete the documents one by one. </p> <p>This is my code. Throws an error: TypeError: Cannot read property 'rkeys' of undefined</p> <pre><code>function collect_data(id) { db.infom_col.find({"_id":id}, function(err,doc) { if(err) throw err; else { console.log("else: " + doc._id); console.log("length: " + doc.rkeys.length); if(typeof(doc[0].rkeys) != 'undefined' &amp;&amp; doc[0].rkeys != null) { for(key in doc[0].rkeys){ doc[0].rkeys[key].forEach(function(entry) { //console.log("entry: " + entry); ids.push(entry); //console.log(ids); }); } if(ids.length &gt; 0) { var id1 = ids.pop(); console.log(id1); db.infom_col.remove({"_id":id1}, function(err,doc1) { if(err) throw err; else { console.log("deleted: " + id1); var id2 = ids.shift(); console.log("going to delete: " + id2); collect_data(id2,null); } }); } } } }); } </code></pre> <p>Update1: </p> <pre><code>function collect_data(id,cb) { db.infom_col.findOne({"_id":id}, function(err,doc) { if(err) throw err; else { console.log("else: " + doc._id); if (doc.rkeys) { console.log("length: " + doc.rkeys.length); for(key in doc.rkeys){ doc.rkeys[key].forEach(function(entry) { console.log("entry: " + entry); ids.push(entry); }); } if(ids.length &gt; 0) { var id1 = ids.shift(); console.log("id1: " + id1); db.infom_col.remove({"_id":id1}, function(err,doc1) { if(err) throw err; else collect_data(id1,null); }); } } } }); } </code></pre>
 

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