tests: check update of items relations (#88687)

tests/test_carddef.py

@@ -1626,6 +1626,57 @@ def test_card_update_related_cascading_loop(pub):
     assert carddata2.data['2_display'] == 'card1 card2 card1 None'
 
 
+def test_card_update_related_items_relation(pub):
+    CardDef.wipe()
+    FormDef.wipe()
+
+    carddef = CardDef()
+    carddef.name = 'foo'
+    carddef.fields = [
+        StringField(id='1', label='Test', varname='foo'),
+    ]
+    carddef.digest_templates = {'default': '{{ form_var_foo }}'}
+    carddef.store()
+    carddef.data_class().wipe()
+
+    carddata1 = carddef.data_class()()
+    carddata1.data = {'1': 'card1'}
+    carddata1.just_created()
+    carddata1.store()
+
+    carddata2 = carddef.data_class()()
+    carddata2.data = {'1': 'card2'}
+    carddata2.just_created()
+    carddata2.store()
+
+    formdef = FormDef()
+    formdef.name = 'foo'
+    formdef.fields = [
+        ItemField(id='1', label='Test', data_source={'type': 'carddef:foo'}),
+        ItemsField(id='2', label='Test2', data_source={'type': 'carddef:foo'}),
+    ]
+    formdef.store()
+
+    formdata = formdef.data_class()()
+    formdata.data = {'1': '1', '2': ['1', '2']}
+    formdata.data['1_display'] = formdef.fields[0].store_display_value(formdata.data, formdef.fields[0].id)
+    formdata.data['2_display'] = formdef.fields[1].store_display_value(formdata.data, formdef.fields[1].id)
+    assert formdata.data['1_display'] == 'card1'
+    assert formdata.data['2_display'] == 'card1, card2'
+    formdata.just_created()
+    formdata.store()
+
+    pub.cleanup()
+    carddef = carddef.get(carddef.id)
+    carddata1 = carddef.data_class().get(carddata1.id)
+    carddata1.data = {'1': 'card1-change1'}
+    carddata1.store()
+
+    formdata.refresh_from_storage()
+    assert formdata.data['1_display'] == 'card1-change1'
+    assert formdata.data['2_display'] == 'card1-change1, card2'
+
+
 def test_card_update_related_deleted(pub):
     BlockDef.wipe()
     CardDef.wipe()