Odtnhj

My app wants to make a list from the strings typed in the TextInput field and show them in the gridlayout in the middle of the window after pressing the button "Buscar". I'm sharing variables and functions between classes but when i try to add a new button with the TextInput.text inside the gridlayout shows the error message:

"AttributeError: 'kivy.properties.ObjectProperty' object has no attribute 'add_widget'" 

Thank you

The interface looks like this

This is my .py file

from kivy.app import App
from kivy.uix.button import Button
from kivy.properties import ObjectProperty, NumericProperty, StringProperty
from kivy.uix.floatlayout import FloatLayout
from kivy.uix.scrollview import ScrollView

class Lista(ScrollView):
 lista_repuestos = ObjectProperty()

class CustomWidget(FloatLayout):
 campo_de_busqueda_text_input = ObjectProperty()
 repuesto = StringProperty('')

 def submit_repuesto(self):
 self.repuesto = self.campo_de_busqueda_text_input.text
 Lista.lista_repuestos.add_widget(Button(text=self.repuesto))


class CustomWidgetApp(App):
 def build(self):
 return CustomWidget()

if __name__ == "__main__":
 CustomWidgetApp().run()

this is my .kv file

CustomWidget:

<CustomWidget>:

 campo_de_busqueda_text_input: campodebusqueda

 TextInput:
 id: campodebusqueda
 size_hint: .7, .1
 pos_hint: "x": .15, "y": .85

 Button:
 on_release: root.submit_repuesto()
 size_hint: .1, .1
 pos_hint: "x": .85, "y": .85
 text: "Buscar"

 Label:
 size_hint: .15, .05
 pos_hint: "x": .05, "y": .15
 text: "Descripción"
 text_size: self.size
 halign: "left"
 Label:
 size_hint: .15, .05
 pos_hint: "x": .05, "y": .10
 text: "Referencia"
 text_size: self.size
 halign: "left"
 Label:
 size_hint: .15, .05
 pos_hint: "x": .05, "y": .05
 text: "Cantidad"
 text_size: self.size
 halign: "left"


<Lista>:

 lista_repuestos: listarepuestos

 GridLayout:

 id: listarepuestos
 size_hint: .7, .6
 pos_hint: "x": .15, "y": .25
 cols: 1
 row_default_height: 50
 row_force_default: True
 padding: 5
 height: self.minimum_height
 size_hint_y: None

Your line in the CustomWidget:

Lista.lista_repuestos.add_widget(Button(text=self.repuesto))

should reference an instance of Lista, not the class itself.