How to convert Mongodb collection results into Array?

Question

I want to send my MongoDB collection results to a service -( Algolia to be precise) as an array.

The results MongoDB return are not array in format. So am thinking if there is a way to convert the collection result into an array.

This is what it returns:

{ _id: 5b30c318ca1ea60cb8a55d2f,
  memeid: 'Z3Q7NC',
  url: 'http://res.cloudinary.com/memeafrica/image/upload/v1529922328/test/adam-levine_nxqpnt.gif',
  tags: 'laugh,laughing,laughing uncontrollaby ',
  caption: '',
  imgs: 'adam-levine.gif',
  __v: 0,
  uploadDate: 2018-06-25T10:25:28.940Z,
  tagarray: [ 'laugh', 'laughing', 'laughinguncontrollaby' ],
  views: 500 }
{ _id: 5b30c759ca1ea60cb8a55d30,
  memeid: '2oIjDP',
  url: 'http://res.cloudinary.com/memeafrica/image/upload/v1529923417/test/Debffc4XkAAuvLj_mvzvpz.jpg'
  tags: 'zuma',
  caption: '',
  imgs: 'Debffc4XkAAuvLj.jpg',
  __v: 0,
  uploadDate: 2018-06-25T10:43:37.859Z,
  tagarray: [ 'zuma' ],
  views: 2000 }
{ _id: 5b30d4b22904771be030db62,
  memeid: 'eLT1F',
  url: 'http://res.cloudinary.com/memeafrica/image/upload/v1529926834/test/crying_b6fjaf.gif',
  tags: 'laugh',
  caption: '',
  imgs: 'crying.gif',
  __v: 0,
  uploadDate: 2018-06-25T11:40:34.649Z,
  tagarray: [ 'laugh' ],
  views: 0 }

What am expecting:

[
{ _id: 5b30c318ca1ea60cb8a55d2f,
  memeid: 'Z3Q7NC',
  url: 'http://res.cloudinary.com/memeafrica/image/upload/v1529922328/test/adam-levine_nxqpnt.gif',
  tags: 'laugh,laughing,laughing uncontrollaby ',
  caption: '',
  imgs: 'adam-levine.gif',
  __v: 0,
  uploadDate: 2018-06-25T10:25:28.940Z,
  tagarray: [ 'laugh', 'laughing', 'laughinguncontrollaby' ],
  views: 500 }
{ _id: 5b30c759ca1ea60cb8a55d30,
  memeid: '2oIjDP',
  url: 'http://res.cloudinary.com/memeafrica/image/upload/v1529923417/test/Debffc4XkAAuvLj_mvzvpz.jpg'
  tags: 'zuma',
  caption: '',
  imgs: 'Debffc4XkAAuvLj.jpg',
  __v: 0,
  uploadDate: 2018-06-25T10:43:37.859Z,
  tagarray: [ 'zuma' ],
  views: 2000 }
{ _id: 5b30d4b22904771be030db62,
  memeid: 'eLT1F',
  url: 'http://res.cloudinary.com/memeafrica/image/upload/v1529926834/test/crying_b6fjaf.gif',
  tags: 'laugh',
  caption: '',
  imgs: 'crying.gif',
  __v: 0,
  uploadDate: 2018-06-25T11:40:34.649Z,
  tagarray: [ 'laugh' ],
  views: 0 }
]

My code:

meme.find({}, (err, meme) => {
  meme.forEach((meme) => {
    console.log(meme); 
  });
});

How do I manipulate the process so it can be array?

Thanks!

You're using Mongoose, so the meme in your meme.find callback is an array; you're iterating over it and console logging each element individually. Maybe I'm not understanding your question. — JohnnyHK
– JohnnyHK, Commented Jun 27, 2018 at 2:10

chuckx · Accepted Answer · 2018-06-26 23:53:41Z

4

The cursor object returned by find() has a toArray() method.

meme.find().toArray((err, memes) => {
    console.log("retrieved memes:");
    console.log(memes);
});

answered Jun 26, 2018 at 23:53

chuckx

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Comments

Jake Miller · Accepted Answer · 2018-06-26 23:48:38Z

1

Just use map. It'll iterate through each meme and add them to an array.

meme.find({}, (err, meme) => {
  const memes = meme.map(m => m);
  // Use the array, pass it to a service, or pass to a callback
});

answered Jun 26, 2018 at 23:48

Jake Miller

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2 Comments

Counter J Over a year ago

When I run the code it is still returning object.

meme.find({}, (err, meme) => {   const memes = meme.map(m => m);   console.log(typeof memes);    // Use the array, pass it to a service, or pass to a callback });

Counter J Over a year ago

The commented part // Use the array, pass it to a service, or pass to a callback How do I pass to a callback? @jakeMiller

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