Mastering Meteor: Techniques for Manipulating Mongodb Data in Real Time Display

Within my Meteor application, I have accomplished the successful publication of data from the server and its subscription on the client side. Instead of directly displaying raw data on the client's screen, I am interested in performing some calculations on it before rendering the result.

To access Mongo data, I am using the Template.example.helpers block as shown below:

Template.example.helpers({
   order: function() {
     orders.find({})
  }
})

This code snippet allows me to render the data on the client side.


        <thead>
            <tr>
              <th>Order ID</th>
              <th>Buyer Name</th>
              <th>Date</th>
              <th>Amount</th>
            </tr>
          </thead>
          <tbody>
            {{#each order}}

            <tr>
              <td>{{card_details.serialNo}}</td>
              <td>{{buyer_details.name}}</td>
              <td>{{card_details.time}}</td>
              <td>INR {{card_details.amount}}</td>
            </tr>
            {{/each}}
          </tbody>

In addition to this, I would like to perform a calculation where the value of (card_details.amount)/100 is displayed on the client side as

<td>INR {{(card_details.amount)/100}}</td>
. Is my current approach correct? If so, any suggestions on how to implement this successfully would be greatly appreciated. Thank you!

Answer №1

When you find yourself in a situation where you only need to modify certain properties of a document (for example, if you want to change the card_details.amount without altering the database), one approach is to create a helper function that takes the original value as input and returns the calculated value.

In your Blaze template, you would implement this like so:

{{dividedBy card_details.amount}}

And your helper function would look something like this:

dividedBy: function(amount) {
    return amount/100 ;
}

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