How can I check my realm schema version without opening the realm file?

问题

The problem we face is we cannot migrate with the new schema version so we want to wipe out all the realm data clean and create a new one instead (for all the user who have schema version less than this new number).

But I cannot find a way for me to know this number except only during in the migration block.

Is there a way to know this schema version else where?

回答1:

Technically you can't check the schema version without accessing the Realm file at all, but you don't need full access and specify a matching schema to read just the schema version. We have functions to allow exactly that.

From Objective-C, you can use the class method:
+[RLMRealm schemaVersionAtPath:error:]

From Realm Swift, you can use the free function: schemaVersionAtPath(_:encryptionKey:error:).

回答2:

I found this answer here

let configCheck = Realm.Configuration();
do {
     let fileUrlIs = try schemaVersionAtURL(configCheck.fileURL!)
    print("schema version \(fileUrlIs)")
} catch  {
    print(error)
}

来源：https://stackoverflow.com/questions/36785743/how-can-i-check-my-realm-schema-version-without-opening-the-realm-file