I want to check if the Field exists in a document in the firestore. but I get this error
Error running simulation — Error: simulator.rules line [8], column [24]. Null value error.
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FadyFouad
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1While the documentation says that `in` works on a map, I typically check explicitly against the `keys` of the map. So: `'providerId' in resource.data.keys`. – Frank van Puffelen Nov 13 '21 at 23:35
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thanks, sir it fixed my issue – FadyFouad Nov 15 '21 at 23:41