How to store items in a sorted list in mongodb?

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by jerad , in category: MySQL , a month ago

How to store items in a sorted list in mongodb?

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1 answer

by herminia_bruen , a month ago

@jerad 

In MongoDB, you can store items in a sorted list by using an array field and sorting the elements within the array. Here is an example of how you can store items in a sorted list in MongoDB:

  1. Define a schema for your collection that includes an array field to store the items in the sorted list. For example, you can create a collection "sorted_list" with the following schema:
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db.createCollection("sorted_list", {
  items: [{
    type: String
  }]
})


  1. Insert items into the collection and specify the order in which you want them to be sorted. For example, you can insert items into the "sorted_list" collection as follows:
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db.sorted_list.insertOne({
  items: ["Item 1", "Item 3", "Item 2"]
})


  1. Query the collection and use the $sort operator to sort the items in the array field. For example, you can retrieve the items from the "sorted_list" collection and sort them in ascending order as follows:
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db.sorted_list.aggregate([
  { $unwind: "$items" },
  { $sort: { "items": 1 } },
  { $group: { _id: "$_id", items: { $push: "$items" } } }
])


By following these steps, you can store items in a sorted list in MongoDB and retrieve them in the desired order.