Set rule from dynamic values

[guiferpa]

Nowadays there's only support to static configuration. For example, configuring some rule to Enum validation it's necessary set this Enum value statically.

I had on problem using defined const values in my source code in validation rule, follow the code example below:

...

type Status string

const (
    StatusCreated Status = "__CREATED__"
    StatusPending Status = "__PENDING__"
    StatusDoing   Status = "__DOING__"
    StatusDone    Status = "__DONE__"
)

...

type Task struct {
    Name   string
    Status Status `json:"status" validate:"enum=__CREATED__,__PENDING__,__DOING__,__DONE__"`
}

...

validator := gody.NewValidator()
validator.AddRules(rule.Enum)

task := Task{}
validator.Validate(task)

With the previous example we have a problem of duplicity and my suggestion for the static config problem is likely this source code below:

type Status string

const (
    StatusCreated Status = "__CREATED__"
    StatusPending Status = "__PENDING__"
    StatusDoing   Status = "__DOING__"
    StatusDone    Status = "__DONE__"
)

...

type Task struct {
    Name   string
    Status Status `json:"status" validate:"enum={status}"`
}

...

validator := gody.NewValidator()
validator.AddRuleParameters(...[]rule.Parameter{
    {
        Name: "status", 
        Value: fmt.Sprintf("%s,%s,%s,%s", StatusCreated, StatusPending, StatusDoing, StatusDone),
    },
})
validator.AddRules(rule.Enum)

task := Task{}
validator.Validate(task)