Migration run executed with an error [Mutation failed: Syntax error, unable to parse entire expression] about sanity

[juice49]

Hi Bogdan. At the moment, we only support filtering on _key segments. This is to avoid folks accidentally selecting more data than they intended, and then performing a destructive mutation on it. We're tweaking dry-run mode to report this error clearly.

For users that are sure they want to perform a wide selection like this, we believe an escape hatch should exist to allow it. That is not currently possible, but I've create a request for us to implement it.

In the meantime, you'll need to use the HTTP API directly in order to execute these mutations. I'm sorry for the inconvenience.

[juice49]

There is one way to achieve this, but it's a bit more verbose:

import {pathsAreEqual} from 'sanity'
import {at, defineMigration, unset} from 'sanity/migrate'

export default defineMigration({
  //…
  migrate: {
    array(node, path) {
      if (pathsAreEqual(path, ['blocks'])) {
        return (node as {_type: string; _key: string}[])
          .filter((item) => item._type === 'blockInvestmentObjective')
          .map((item) => at(['blocks', {_key: item._key}, 'text'], unset()))
      }
    },
  },
})