42 lines
773 B
Go
42 lines
773 B
Go
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package utils
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import (
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"fmt"
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"github.com/fatih/structs"
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"reflect"
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"strconv"
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)
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func ApplyDefaultValues(struct_ interface{}) (err error) {
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o := structs.New(struct_)
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for _, field := range o.Fields() {
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defaultValue := field.Tag("default")
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if defaultValue == "" {
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continue
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}
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var val interface{}
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switch field.Kind() {
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case reflect.String:
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val = defaultValue
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case reflect.Bool:
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if defaultValue == "true" {
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val = true
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} else if defaultValue == "false" {
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val = false
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} else {
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return fmt.Errorf("invalid bool expression: %v, use true/false", defaultValue)
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}
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case reflect.Int:
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val, err = strconv.Atoi(defaultValue)
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if err != nil {
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return err
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}
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default:
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val = field.Value()
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}
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field.Set(val)
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}
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return nil
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}
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