Exploring the fundamentals of Firebase with a focus on JavaScript and the importance

I am looking to set up a coupon codes database using Firebase. The structure of my data will be as follows:

[
    { 
        "couponCode": "string",
        "isAvailable": true
    },
    {
        "couponCode": "string",
        "isAvailable": true
    },
    ...
]

My goal is to retrieve the value for the couponCode key and then check the value for the isAvailable key. If the couponCode is valid, I want to update the value of the isAvailable key to false. How can I implement this validation using the Firebase API?

javascriptarraysjsonvalidationfirebase

Answer №1

To ensure each coupon code is unique, it's recommended to store the data in the following format:

"couponCodes": {
  "couponCode1": {
    "available": true
  },
  "couponCode2": {
    "available": true
  }
}

When a user attempts to redeem a coupon, perform a transaction on that specific code:

ref.child('couponCodes').child('couponCode1').transaction(function(current) {
  if (current && current.available) {
    current.available = false;
    // TODO: This is also when you should apply the discount for the coupon to the user
  }
  return current;
});

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