Question 120503 in Firebase Question posted in
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How to limit a number of firebase storage of images?

I created this piece of code as a rule too limit number of items stored there, but I still can add as many new images, as I want.

     match /images/logo/{userId}/{imageId} {
      allow write: if request.resource.size < 1 * 1024 * 1024
                   && request.resource.contentType.matches('image/.*')
        &&  list(/images/logo/{userId}).size() < 1;
}
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2

Answers


  1. 0

    It’s not possible to limit the number of objects in a Cloud Storage bucket using Firebase security rules. There is no function list() available in security rules.

    You’re probably better off recording the count of objects in a database and use that in conjunction with a Cloud Functions trigger to determine if an object should be allowed to remain after uploading.

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  2. 0

    Let the client upload the logo image with the same filename, then there will be only one, even without rules.

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