TypeError: Cannot read property '_status' of undefined

[gentlee]

Types of watermelon 0.28.0 show that they support passing array of models:

await this.database.write(async (writer) => {
  writer.batch(models)
}, description)

But this error is fired: TypeError: Cannot read property '_status' of undefined

This is fixed code:

await this.database.write(async (writer) => {
  writer.batch(...models)
}, description)

Seems that it was supported in 0.25.5 but no longer supported in 0.28.0.

[70Ni]

This seems like a migration issue

[grddavies]

Looks like Database.batch supports being called either as a single array of operations, or operations spread as arguments, but not a spread call that includes both operations and arrays of operations. The TS type declaration for this method doesn't prevent calling in a way that will cause a runtime error.

// Ok
database.batch(op1, op2, op3)
database.batch([op1, op2, op3])
// Runtime error
database.batch(op1, [op2, op3])

WatermelonDB/src/Database/index.js

Line 103 in 5c46322

const actualRecords: Array<?Model> = fromArrayOrSpread(records, 'Database.batch', 'Model')