Allow default values on array of struct

[ghost]

Let's say I have a YAML like this

connections:
  - name: demo
    hosts:
      - "demo.example.com:9200"
    username: admin
    password: password
    ssl: true
    ssl_verify: true
    version: 7
  - name: test
    hosts:
      - "test.example.com:9200"
    username: admin
    password: password

And a struct like this

type Config struct {
    Connections []struct {
        Name      string
        Hosts     []string
        Username  string
        Password  string
        Ssl       bool
        SslVerify bool
        Version   int
    }
}

And I want following code to set a default value for Config.Connections[*].Ssl :

viper.SetDefault("connections[].ssl", "true")

Right now it is not happening, probably because Config.Connections is not initialized before the Unmarshalling.

[ghost]

I realized I can set defaults in implementation of UnmarshalYAML interface for Connections struct, which will work for array of structs. So I am closing this issue.

[renta]

@dealancer Have you fixed this problem a way you wanted? According to this #338 (comment) and my tests custom UnmarshalYAML will not work.