Optional values are not automatically migrated to required columns since it is a lossy process.
This test case revealed an issue where the number of objects can be lost if all properties of an
object were optional and are all being migrated to required. This happens because the migration
process removes the optional columns in a first pass, and recreates them as required in a second
pass. Since this results in all columns being removed, we lose track of how many objects were
stored. We avoid this by detecting the case where we are about to remove the last column and
inserting a placeholder column that we'll remove after inserting the new columns.
Required columns are migrated to optional by creating a new nullable column,
copying the data from the required column to the optional column, then removing
the original required column.
Added a session ID, that actually tracks the Realm constructor in our RPC server's JS context. This conveniently let us remove the special casing for defaultPath as well as letting us call the Realm constructor with JSObjectCallAsConstructor.
Fixes#68
Since notifications are called synchronously after a write, we fake it by calling them manually for now. The future plan will be more involved, so some of that is stubbed out.
This also appears to fix crashes when running ReactTests with Chrome debugging enabled!
The crash when tests failed was due to JavaScriptCore trying to create a backtrace with the native call stack.
The test structure is now provided by a JS API, that is used by all things that run tests. Also, the tests can be run manually by tapping a button in the ReactTests app.
The deleteTestFiles() function is now added to the Realm object, so that it's easy for the RPC module to handle this as well. We can only do this in testing environments in the future.
An exception was thrown when parsing the JSON when only a string was passed. This is better and no longer uses the Objective-C API for converting the dictionary to a JSValue.
Mark Rowe
Scott Kyle
Ari Lazier
Thomas Goyne
Thomas Goyne