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nullbooleanfield.go
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/
nullbooleanfield.go
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package gforms
import (
"bytes"
"reflect"
)
// It maps value to FormInstance.CleanedData as type `bool`.
type NullBooleanField struct {
BaseField
}
// Create a new NullBooleanField instance.
func (f *NullBooleanField) New() FieldInterface {
fi := new(NullBooleanFieldInstance)
fi.Model = f
fi.V = nilV("")
return fi
}
// Instance for NullBooleanField.
type NullBooleanFieldInstance struct {
FieldInstance
}
type nullBooleanContext struct {
Field FieldInterface
Checked bool
}
// Create a new NullBooleanField with validators and widgets.
func NewNullBooleanField(name string, vs Validators, ws ...Widget) *NullBooleanField {
f := new(NullBooleanField)
f.name = name
f.validators = vs
if len(ws) > 0 {
f.widget = ws[0]
}
return f
}
// Get a value from request data, and clean it as type `bool`.
func (f *NullBooleanFieldInstance) Clean(data Data) error {
m, hasField := data[f.GetName()]
if hasField {
f.V = m
v := false
if m.Kind == reflect.String {
vs := m.rawValueAsString()
if vs != nil {
v = true
}
} else if m.Kind == reflect.Bool {
v = m.rawValueAsBool()
}
m.Value = v
m.Kind = reflect.Bool
m.IsNil = false
return nil
}
nv := nilV("")
f.V = nv
return nil
}
func (f *NullBooleanFieldInstance) html() string {
var buffer bytes.Buffer
cx := new(nullBooleanContext)
cx.Field = f
checked, _ := f.V.Value.(bool)
cx.Checked = checked
err := Template.ExecuteTemplate(&buffer, "BooleanTypeField", cx)
if err != nil {
panic(err)
}
return buffer.String()
}
// Get as HTML format.
func (f *NullBooleanFieldInstance) Html() string {
return fieldToHtml(f)
}