tests: check item prefill with custom id (#88024)

tests/form_pages/test_prefill.py

@@ -631,6 +631,107 @@ def test_form_page_item_with_variable_data_source_prefill(pub):
         assert not resp.pyquery('#form_error_f2').text()
 
 
+def test_form_page_item_with_card_with_custom_id_prefill(pub):
+    create_user(pub)
+    CardDef.wipe()
+
+    carddef = CardDef()
+    carddef.name = 'Test'
+    carddef.fields = [
+        fields.StringField(id='0', label='blah', varname='blah'),
+    ]
+    carddef.digest_templates = {'default': '{{ form_var_blah|upper }}'}
+    carddef.id_template = '{{ form_var_blah }}'
+    carddef.store()
+    carddef.data_class().wipe()
+
+    carddata1 = carddef.data_class()()
+    carddata1.data = {'0': 'bar'}
+    carddata1.just_created()
+    carddata1.store()
+
+    carddata2 = carddef.data_class()()
+    carddata2.data = {'0': 'foo'}
+    carddata2.just_created()
+    carddata2.store()
+
+    formdef = create_formdef()
+    formdef.data_class().wipe()
+    formdef.fields = [
+        fields.ItemField(
+            id='2',
+            label='item',
+            varname='item',
+            required=False,
+            data_source={'type': 'carddef:test'},
+            prefill={'type': 'string', 'value': 'foo'},
+        ),
+    ]
+    formdef.store()
+
+    resp = get_app(pub).get('/test/')
+    assert [x.attrib['value'] for x in resp.pyquery('#form_f2 option')] == ['bar', 'foo']
+    assert resp.form['f2'].value == 'foo'
+    assert not resp.pyquery('#form_error_f2').text()
+
+
+def test_form_page_block_with_item_with_card_with_custom_id_prefill(pub):
+    create_user(pub)
+    CardDef.wipe()
+
+    carddef = CardDef()
+    carddef.name = 'Test'
+    carddef.fields = [
+        fields.StringField(id='0', label='blah', varname='blah'),
+    ]
+    carddef.digest_templates = {'default': 'card {{ form_var_blah }}'}
+    carddef.id_template = '{{ form_var_blah }}'
+    carddef.store()
+    carddef.data_class().wipe()
+
+    carddata1 = carddef.data_class()()
+    carddata1.data = {'0': 'bar'}
+    carddata1.just_created()
+    carddata1.store()
+
+    carddata2 = carddef.data_class()()
+    carddata2.data = {'0': 'foo'}
+    carddata2.just_created()
+    carddata2.store()
+
+    BlockDef.wipe()
+    block = BlockDef()
+    block.name = 'foobar'
+    block.fields = [
+        fields.ItemField(
+            id='123',
+            label='item',
+            varname='item',
+            required=False,
+            data_source={'type': 'carddef:test'},
+        ),
+    ]
+    block.store()
+
+    formdef = create_formdef()
+    formdef.data_class().wipe()
+    formdef.fields = [
+        fields.BlockField(
+            id='2',
+            label='test',
+            block_slug='foobar',
+            varname='foobar',
+            prefill={'type': 'string', 'value': '{% block_value item="foo" %}'},
+        ),
+    ]
+    formdef.store()
+
+    resp = get_app(pub).get('/test/')
+    assert [x.attrib['value'] for x in resp.pyquery('#form_f2__element0__f123 option')] == ['bar', 'foo']
+    assert resp.form['f2$element0$f123'].value == 'foo'
+    assert not resp.pyquery('.widget-with-error')
+
+
 def test_form_page_item_with_computed_field_variable_data_source_prefill(pub):
     create_user(pub)
     formdef = create_formdef()