CODEWITHSUNDEEP
javascriptfirebasefirebase-realtime-databasegoogle-cloud-functions
William Hu
William Hu

Reputation: 16141

firebase cloud write data with a "key" paramter

I am learning Cloud Functions for Firebase. What I want is pass the key and value in the URL parameters, like:

https://xxx.cloudfunctions.net/addMessageSet?text=goodboy&key=testKey

And then in the Realtime Database set a testKey:goodboy.

I know use push() will generate a unique key (if i understood correctly) but I'd like use my own key each time. I am not sure if set() works.

My problem is push({originalKey:original}) doesn't work as expected. It writes:

originalKey: goodboy

Where originalKey is just key not the parameter from the URL. Is this possible or any other solutions?

The code is like below:

exports.addMessageSet = functions.https.onRequest((req, res) => {
    // Grab the text parameter.
    const original = req.query.text;
    const originalKey = req.query.key;
    admin.database().ref('/messages/').push({originalKey:original}).then(snapshot => {
        console.log('goodboy', original, originalKey);
        res.redirect(303, snapshot.ref);
    });
});

Upvotes: 0

Views: 271

Answers (2)

Gabriel Barreto
Gabriel Barreto

Reputation: 6421

If you want to use a key you're generating without firebase generating another you need to use set with your key in the path

admin.database().ref('/messages/' + originalKey).set(original).then(snapshot => { });
// if originalKey is not a string use String(originalKey)

You said about originalKey not beeing a url, but everything in firebase if url based, like this you're doing

myDB
|_ messages
   |_ originalKey: original

and not

myDB > messages > originalKey > original

If you need another key after the messages node i recomend using a date UNIX number, momentJS is good to handle this.

Hope it helps

Upvotes: 1

Clinton
Clinton

Reputation: 973

Using push() will indeed generate a unique key. You will need to use either set() or update().

Note that using set() will overwrite the data at the specified location including any child nodes.

Upvotes: 0

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