Understanding custom filters

[nlandeker]

Hello,

I have an issue with custom filter logic. I have written a filer below to uphold some custom logic required for that field, but i have noticed that it has no effect on the field, event tried returning straight -1 for all, with no luck.

v.AddFilter(
		"tip_amount_filter", func(val interface{}) int64 {
			if val != nil {
				log.WithFields(log.Fields{"value": val}).Info("value should be other than nil")
				return int64(val.(float64))
			} else {
				log.WithFields(log.Fields{"value": val}).Info("value should be nil")
				return -1
			}
		},
	)

v.FilterRule("tip_amount", "tip_amount_filter")

What am I doing wrong?

Thanks.

[inhere]

hi @nlandeker

You need to add at least one validation rule, then call Validate() method.

validate/issues_test.go

Lines 556 to 585 in 4ead858

	func TestIssue_107(t *testing.T) {
	taFilter := func(val interface{}) int64 {
	if val != nil {
	// log.WithFields(log.Fields{"value": val}).Info("value should be other than nil")
	return int64(val.(float64))
	} else {
	// log.WithFields(log.Fields{"value": val}).Info("value should be nil")
	return -1
	}
	}
	v := validate.Map(map[string]interface{}{
	"tip_amount": float64(12),
	})
	v.AddFilter("tip_amount_filter", taFilter)
	// method 1:
	// v.FilterRule("tip_amount", "tip_amount_filter")
	// v.AddRule("tip_amount", "int")
	// method 2:
	v.StringRule("tip_amount", "int", "tip_amount_filter")
	assert.Equal(t, float64(12), v.RawVal("tip_amount"))
	// call validate
	assert.True(t, v.Validate())
	// dump.Println(v.FilteredData())
	dump.Println(v.SafeData())
	assert.Equal(t, int64(12), v.SafeVal("tip_amount"))
	}