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You need to .GroupBy MasterDocument._id as below:

And I guess, when data property has created, access property has created internally

No, you're not right. A data property does not contain a getter/setter. And an accessor property does not contain a space to store a value. It's either one or the other, it's not like data properties are a layer over accessor properties or the other way round.

It might help to use Object.getOwnPropertyDescriptor to see what the two different ways of writing that object literal generate:

You should create a custom component for simplicity representing your input radio and loop

1. The list of materials object
2. The list of values inside it

In ProductScreen:

• just try simple $lookup
• $match if result not equal to empty array

Ok...

The original code had to be tweaked a bit, but a friend of mine helped me get this working :-)

It was working out of the box, but when we clicked "Update Cart" it would stop, so we had to create two functions to make this work.

One for the plus and minus icons, the other for the button itself.

We wanted this to work right out of the gate, before the "Update Cart" button is clicked, so that's why we call the qtyChange function in the document.ready.

Then, we noticed that when the "Update Cart" button was clicked WooCommerce actually removes and re-adds the number input, so we have to re-execute our script after the button is clicked...but there is a catch! Since, this is done using ajax and the page actually isn't reloading, we need to wait until after the ajax process completes so that nothing executes too quickly. If I didn't put a timeout on the code, then the buttons would not show up, which was my initial problem.

I also had an issue where I got the buttons to show up, but the plus and minus icons did not make the input number advance or decrease which is what the other timeout function is for.

Finally, I had to make one more change...I added .remove as a selector because the X next to each product also caused the plus and minus icons to disappear.

All in all now it's working. This would've been simpler if we could have modified the WooCommerce code directly, but that could get wiped out with a plugin update so this is a better solution :-)

Now my code looks like:

Props aren’t designed to be mutable. In other words, setting a new value on this.props.color won’t cause the rectangle to re-render. Even if it did, the value of this in your callback will be for the instance of Wall, because you’re using an arrow function, which inherits its this from the surrounding scope.

One solution would be to have your Wall component store the colour of each Rectangle as state, and pass that via the color prop. Your callback handler could then change the colour. However, because you have multiple Rectangles, you would need some way of distinguishing between them an index or perhaps ID.

If it’s not important for your Wall to know whether the Rectangle has been clicked, then it would be simpler to define the click handler inside Rectangle and have it modify state in the Rectangle, i.e:

You're getting an empty array, because the $lookup catching anything.

• match the types
• $addFields to convert

PLAYGROUND

This should be the first stage: