Question 117030 in Mongodb Question posted in
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Mongodb – How to get nesting from an object

I add object with categories in a DB. It shows the price and date of addition. How can I print the date to the console? Now, I have in the console: [ [ { cost: ’50$’, date: [Object] } ] ]. And I need to take what is in date. How can i do this?

// my obj

сategories: {
    products: {
      cost: "50$",
      date: {
        day: `11`,
        month: `11`,
        year: `11`,
      },
    },
  },

  // get date

  mongoClient.connect(function(err, client) {
    const db = client.db("expensesdb");
    const collection = db.collection("users");

    if (err) return console.log(err);

    collection.find({
      name: "Tom"
    }).toArray(function(err, results) {
      let res = results.map((user) => user.сategories.map((cat) => cat.products));
      console.log(res);
      client.close();
    });
  });
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2

Answers


  1. 0

    For printing all json data use:

    console.log(JSON.stringify(res, null, 2));

    It serializes your res variable with 2 indent spaces, so it basically turn your JavaScript object into a Json string equivalent.

    null refer to a replacer function.

    See details on documentation.

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  2. 0 
            let Object = {
            сategories: {
                products: {
                cost: "50$",
                    date: {
                        day: `11`,
                        month: `11`,
                        year: `11`,
                    },
                },
            }
        }

        let DateObject = Object.сategories.products.date
        let Date = `${DateObject.year} / ${DateObject.month} / ${DateObject.day}`
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