forked from mirror/gin
46 lines
1013 B
Go
46 lines
1013 B
Go
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package gin
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import (
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"errors"
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"reflect"
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"strings"
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)
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func Validate(c *Context, obj interface{}) error {
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var err error
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typ := reflect.TypeOf(obj)
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val := reflect.ValueOf(obj)
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if typ.Kind() == reflect.Ptr {
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typ = typ.Elem()
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val = val.Elem()
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}
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for i := 0; i < typ.NumField(); i++ {
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field := typ.Field(i)
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fieldValue := val.Field(i).Interface()
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zero := reflect.Zero(field.Type).Interface()
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// Validate nested and embedded structs (if pointer, only do so if not nil)
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if field.Type.Kind() == reflect.Struct ||
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(field.Type.Kind() == reflect.Ptr && !reflect.DeepEqual(zero, fieldValue)) {
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err = Validate(c, fieldValue)
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}
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if strings.Index(field.Tag.Get("binding"), "required") > -1 {
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if reflect.DeepEqual(zero, fieldValue) {
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name := field.Name
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if j := field.Tag.Get("json"); j != "" {
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name = j
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} else if f := field.Tag.Get("form"); f != "" {
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name = f
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}
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err = errors.New("Required " + name)
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c.Error(err, "json validation")
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}
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}
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}
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return err
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}
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