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Firestore security rules not working on specific field


Firestore security rules not working on specific field

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Firestore security rules not working on specific field
Tag : typescript , By : warttack
Date : November 24 2020, 05:47 AM

this will help Security rules don't filter data by themselves. The security rules instead only allow queries that are guaranteed to will only ever match documents that are allowed. If there is a chance that a query returns documents that are not allowed, the security rules reject the query straight away.
Your query filters on cust_id while the rules allow/disallow on user_id. This means your query is trying to retrieve documents you don't have access to. Since your query might return a document with the wrong user_id, the rules reject the query. See https://firebase.google.com/docs/firestore/security/rules-query
allow read: if request.auth.uid == resource.data.cust_id;

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Firestore Security Rules - How Do I Use a Variable for a Field Name?


Tag : firebase , By : Roel van Dijk
Date : March 29 2020, 07:55 AM
I hope this helps . If I have a document saved at /recordTypeX/{autoKey}, with the following structure: , Here is an example of one of my fire base rules.
function containsResourceOwnerId() {
    // /database/{database}/documents/example/{exampleId}
    // exampleDocument => { abc123: true }, request.auth.uid = abc123
    return resource.data[request.auth.uid] == true;
}
function isMemberOf() {
    return resource.data.memberUserIds[request.auth.uid] == true;
}
match /teams/{teamsId} {
    allow read: if isMemberOf();

Firestore security rules: Using hasOnly on a request to check if only a specific field is updated


Tag : firebase , By : Mario Tristan
Date : March 29 2020, 07:55 AM
wish helps you request.resource.data doesn't contain the request data itself, but it rather contains the new version of the resource after the write operation. Therefore the check failed.
Firestore documentation on request.resource:

Per field rules in Firestore Security Rules


Tag : firebase , By : Sigfrieg
Date : March 29 2020, 07:55 AM
it helps some times What you're looking for is to make a field non-modifiable. You do that by checking in your rules that the value of the field is the same after the request as before it.
I have a simple helper function for this in my rules:
function isUnmodified(key) {
  return request.resource.data[key] == resource.data[key]
}
  allow update: if isAdmin() || isUnmodified('name');

how to disallow update specific field in firestore document via security rules?


Tag : firebase , By : Keniwan
Date : March 29 2020, 07:55 AM
will be helpful for those in need Compare the contents of the requested document update to the existing contents to make sure it didn't change:
allow update: if request.resource.data.capacity == resource.data.capacity;

Firestore security rules, nested field


Tag : development , By : johntynan
Date : March 29 2020, 07:55 AM
it should still fix some issue EDIT (12/18/17): These are both now fixed, so this should Just Work™.
As @hatboysam mentioned, you're currently hitting two bugs that we're working quickly to fix:
match /chats/{trip} {
    match /messages/{message} {
       allow read, write: if get(/databases/$(database)/documents/trips/$(trip)).data.toArea != null
    }
}
match /bogusPathThatWillNeverMatch {
  allow read: if resource.data != null; // should never be true
}
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