@data-client v0.18 Migration

Applies to anyone implementing a custom Schema — SchemaSimple, SchemaClass, polymorphic wrappers, or types that subclass EntityMixin directly. Built-in schemas (Entity, resource(), Collection, Union, Values, Array, Object, Query, Invalidate, Lazy) are migrated by the library.

What changed

Schema.denormalize and Schema.normalize now take a single delegate instead of (args, unvisit) / (args, visit, delegate):

denormalize(input, delegate) { return delegate.unvisit(this.schema, input); }
normalize(input, parent, key, delegate /*, parentEntity? */) {
  return delegate.visit(this.schema, input, parent, key);
}

Critical semantic change: reading delegate.args does not contribute to cache invalidation. Schemas whose output varies with endpoint args must register that dependency through delegate.argsKey(fn). See Step 2 below.

Step 1: run the codemod