Firebase DB

Firebase DB is an online, real-time database used to store and read data.

Example

Creating and saving a post information on Firebase Database.

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Blocks

add key value

Add data to Firebase Database with key-value format.

Type	Explanation	Required
Firebase Database	Firebase Database Component	Yes
String	Key of the value you are trying to save	Yes
Map	Map of values	Yes

push value

Push data to Firebase Database with a generated unique random key.

Type	Explanation	Required
Firebase Database	Firebase Database Component	Yes
Map	Map of values	Yes

push getKey

Generate a unique random key.

Type	Explanation	Required
Firebase Database	Firebase Database Component	Yes

delete key

Delete the data from the Databse with the given key.

Type	Explanation	Required
Firebase Database	Firebase Database Component	Yes
String	Key of the value you are trying to delete	Yes

get children to then

Retrieve the value to List Map, then perform additional action.

Type	Explanation	Required
Firebase Database	Firebase Database Component	Yes
List Map	List Map variable	Yes

start listening

Start listening to changes in the database. The component starts listening by default. Only used after stopping the listener.

Type	Explanation	Required
Firebase Database	Firebase Database Component	Yes

stop listening

Stop listening to the changes in the database.

Type	Explanation	Required
Firebase Database	Firebase Database Component	Yes

Events

onChildAdded

Triggered when a new child value is added.

onChildChnaged

Triggered when any value in children has changed.

onChildRemoved

Triggered when a child is removed from reference.

onCancelled

Triggered when any read or write action is cancelled.