Error when attempting to set a map in Mongodb / mgo

Question

I have something like...

type Item struct {
  Name string `json:"name" bson:"name"`
  Config map[string]interface{} `json:"config" bson:"config,inline"`
}

func (repository *ItemRepository) UpdateConfig(id string, config map[string]interface{}) {
  change := mgo.Change{
    Update: bson.M{"$set": bson.M{
      "config": config,
    }},
  },
}

But I get an error Raw Unmarshal can't deal with struct values. Use a pointer. Raw Unmarshal can't deal with struct values. Use a pointer. . I'm not entirely sure what this means, or what's expected. Is it possible to just store 'loose' data as a sub-document?

Answer 1

我通过使用Update而不是FindId(id).Apply(change, nil)来修复此问题FindId(id).Apply(change, nil) 。