How To Insert/update Data In Firebase Using Javascript?

I have a firebase database where a node structure is like this.How do I insert/update data from a web page using javascript? I want to insert data individually in promo_ar,promo_en

Solution 1:

You must do it this way

firebase.database().ref('Promotions/promo_en').set({
    desc_promo: value,
    name_promo: value
  });

Remember that using set, you update elements of a node of your database, on the other hand, when you perform this type of updates, you must send both elements to update within that node, if you omit any element, it is removed from your base, for example...

firebase.database().ref('Promotions/promo_en').set({
    desc_promo: value,

  });

In this case, only desc_promo is being updated, thus eliminating the rest of the node elements.

in the same way you can insert new nodes in an element like this

firebase.database().ref('Promotions/promo_es').set({
    desc_promo: value,
    name_promo: value

  });

in this way we add the Spanish language to the Promotions node

AGGREGATE:

you can have as many nodes as you want below a main node, remember that if you are going to update the final node, it does not affect the higher ones, but the higher node does affect the lower ones, for example

firebase.database().ref('Promotions/promo_es/exchange').set(
    { 
        desc_promo: value, 
        name_promo: value 
    }
);

Promotions
        |_>promo_es
                |_>desc_promo : value 
                |_>name_promo : value 
                |_>exchange
                        |_>desc_promo : value//<-this is updated or created
                        |_>name_promo : value//<- this is updated or created

now if you edit the Promotions / promo_es node without including its sub nodes, these will be eliminated, you can perform the tests that you deem convenient in firebase to polish the method to use in your system