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Explain submitWithAdditionalValues() usage #6403

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33 changes: 33 additions & 0 deletions book/testing.rst
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Expand Up @@ -687,6 +687,39 @@ their type::
// Upload a file
$form['photo']->upload('/path/to/lucas.jpg');

If you use a :doc:`Collection of Forms </cookbook/form/form_collections>`,
you can't add fields to the existing form (this results in an error
``Unreachable field "…"``). You can use the `submitWithAdditionalValues()`
method in order to add new fields::

$crawler = $client->submitWithAdditionalValues(
$form,
array(),
// New values:
array('task[tags][0][name]' => 'tag1'),
);

// The tag has been added.
$this->assertEquals(1, $crawler->filter('ul.tags > li')->count());

Where ``task[tags][0][name]`` is the name of a field usually created
with Javascript.

You can remove an existing field, e.g. a tag::

// Get the values of the form.
$values = $form->getPhpValues();

// Remove the first tag.
unset($values['task']['tags'][0]);

// Submit the data.
$crawler = $client->request($form->getMethod(), $form->getUri(),
$values, $form->getPhpFiles());

// The tag has been removed.
$this->assertEquals(0, $crawler->filter('ul.tags > li')->count());

.. tip::

If you purposefully want to select "invalid" select/radio values, see
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