Unable to retrieve JSON value by specifying the key

Question

Hey everyone, I'm sending a JSON Object to my Lambda function (Node.js), I basically want to get a few values from the JSON and convert them into a specific format and then send those values back in the response. I am able to read the values using JSON.parse() but for some reason I cannot access a particular value by specifying the key. In the screenshot you can see that I am typing in myObj1.blueprint but I get an error saying that it is undefined. Any help would be appreciated!
![Parsed JSON Object](/media/postImages/original/IMHsak_QIrRNyuYGZ_thSMJg)
![Trying to access the value by dot notation](/media/postImages/original/IM9BwVuEZ2Rue1fThl3Cpwsw)
![Undefined Error](/media/postImages/original/IMI2HAIYy0R9Oj1eLt6btulQ)

Answer

Below is the error I get when I try to JSON.parse(event) 
![Error](/media/postImages/original/IMudqlLI6GRd6ecbYHNPZcLw)

Answer

Hi,
do both dot notation myObj1.blueprint and bracket notation fail?
Have you tried further debugging your json key/value pairs with a loop, for example something like

```
for var keyval in myObj1 {
  if(myObj1.hasOwnProperty(keyval)) {
    console.log('key-val pair', keyval, myObj1[keyval]);
  }
}
```

Answer

Parse the JSON body explicitly:

```
const event = JSON.parse(event); 
```

Access properties using dot notation:

```
const blueprint = event.blueprint;
```

A few things to check:

* Make sure the JSON string is valid and parses correctly
* Check that the property name is spelled correctly
* Print out the parsed object to verify it has the expected structure
* Parsing the JSON turns it into a Javascript object that you can then access properties from using dot notation or brackets. This allows you to work with the data rather than just a string.

Unable to retrieve JSON value by specifying the key

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