Bug: cache umarshalling custom JSONB type fails

[ivanvanderbyl]

We have a number of fields which store arrays of enum string values in JSONB columns. When we get a cache hit, it instead returns this error:

unmarshal field borders: invalid character '\\x00' looking for beginning of value

Ent schema in question:

// in ent/schema/route.go
field.JSON("borders", customfield.Borders{}),

// in customfield/borders.go
type Border string
type Borders []Border
const (
	BorderAIR     Border = "AIR"
	BorderLAND    Border = "LAND"
	BorderSEA     Border = "SEA"
	BorderUnknown Border = "UNKNOWN"
)

Is there something we need to implement for cache marshalling/unmarshalling into the cache?

[bearchit]

@a8m Any progress on this issue?