The Games SDK expects projects to have a Realtime Database URL in google-services.json and GoogleService-Info.plist

[korober]

Having the identical problem. Trying to consume Google Analytics and Crashlytics on Unity 2020, exact same error. Why is creating a Realtime Database required when I am using Google Analytics and Crashlytics only? Others on other platforms consuming Google Analytics and Crashlytics are able to do so without having to create a Realtime Database.

It may be a bug if Realtime Database is a mandatory requirement, and it is not actually a requirement...

Originally posted by @BigEndahs in #892 (comment)

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[patm1987]

If a Firebase project was created without a Realtime Database, the Firebase console used to insert a "default" URL in both the downloaded google-services.json and GoogleService-Info.plist files. Now that field is omitted entirely if a user doesn't add a Realtime Database to their project.

It appears that generate_xml_from_google_services_json.py is still expecting this key in the file.

I've attached both files generated for a "dummy" project (called com.empty.project), adding these to any of the quickstarts should trigger the related failure case.
Archive.zip

[patm1987]

Thanks for filing this report @korober ,

You can use Analytics and Crashlytics without a Database instance, this is a bug that snuck into the games SDK when an upstream behaviour was updated.

As a temporary workaround if you don't wish to add a Database instance, you can add a "dummy" database. For this find your project id (this might have some numbers/digits appended to the end. So "empty-project" here is "empty-project-95e84"):

If you're building an Android game, open your generated google-services.json and locate a section called "project_info" at the top:

  "project_info": {
    "project_number": "324982186402",
    "project_id": "empty-project-95e84",
    "storage_bucket": "empty-project-95e84.appspot.com"
  },

Add a "firebase_url" to it like so:

  "project_info": {
    "project_number": "324982186402",
    "firebase_url": "https://empty-project-95e84.firebaseio.com",
    "project_id": "empty-project-95e84",
    "storage_bucket": "empty-project-95e84.appspot.com"
  },

Substituting the empty-project-95e84 with your project id.

Similarly, if you're building an iOS game, open your GoogleService-Info.plist file and scroll down to the bottom before:

</dict>
</plist>

And write

	<key>DATABASE_URL</key>
	<string>https://empty-project-95e84.firebaseio.com</string>
</dict>
</plist>

again replacing empty-project-95e84 with your project id.

Let me know if that helps!
--Patrick

[chkuang-g]

To summarize, there are two place need to be update in order to support the case when RT DB is not created in a Firebase project.

1. generate_xml_from_google_services_json.py should support the case when database url is missing. When it is missing, it should use https://<project-id>-default-rtdb-<region>.firebasedatabase.app by default. For example, this line should be replaced by something like

   'firebase_url': xml_dict.get('DATABASE_URL', xml_dict['PROJECT_ID'] + "-default-rtdb.firebaseio.com"
   

2. When Firebase App is created. There is no need to warn when database_url is missing. This is harmless for now but slightly annoying.

Seems like the only required fields are

• Project ID
• API key
• App ID

That is, database url and storage buckets are optional.

We also need to make sure the app fail gracefully when someone tries to use Database or Storage API but forgot to create the instance on Firebase console.

Shawn

[alexames]

This should be fixed as of this pull request. Feel free to reopen this issue if the problem persists.