How to read/write to nested Firebase Object in Angular

[hqinmanama]

I am working with Angular and Firebase's Real Time Database. I am currently following the AngularFire documentation and am retrieving data as lists. I can't seem to figure out how to get a nested list from within a list.

Here is an example of my Firebase RTDB structure:

- items
        - Item 1
                - age: 22
                - personality
                        - temperament: "happy"
        - Item 2
                - age: 34
                - personality
                        -temperament: "angry"

I would like to be able to access the temperament value to update or retrieve. This is in items/Item1/personality/. By following the documentation I have linked above, I am able to access up to items/Item1/ but cannot figure out a way to go beyond that. I have seen some solutions suggesting to use the forEach() function but could not find any documentation to help guide me.

I have also noted that the documentation linked above uses the async pipe method, which I believe automatically sorts out the subscription. Currently, I am subscribing to the observables myself within the app.component.ts file rather than using the async pipe method. This is working, however, only up to the first level. I am looking to learn how to be able to access the child nodes and more.

Any help would be appreciated!