No such method/property 'isString' in Firebase Database rule -

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i'm new in firebase, want each project property string of minimum length 32

{ "rules": {   "project": {     "$a": {       ".read": true,       ".write": "auth != null && $a.isstring() && 32 <= $a.length",

here $a project property name $a.isstring() not aviliable & getting error

enter image description here

how check $a string of minimum 32 length ?

keys strings, don't need (and apparently can't even) check that.

{   "rules": {     "project": {       "$a": {         ".read": true,         ".write": "auth != null && 32 <= $a.length",

by way: yoda conditions don't make difference in firebase security rules, since we'll never assign value left-hand side of expression anyway.


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