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[Testing] Explain how to add or remove data in a collection of forms #6427

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[Testing] Explain how to add or remove data in a collection of forms #6427

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42 changes: 42 additions & 0 deletions book/testing.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -699,6 +699,48 @@ their type::
PHP format (it converts the keys with square brackets notation - e.g.
``my_form[subject]`` - to PHP arrays).

If you use a :doc:`Collection of Forms </cookbook/form/form_collections>`,
you can't add fields to an existing form with
``$form['task[tags][0][name]'] = 'foo';``. This results in an error
``Unreachable field "…"`` because ``$form`` can only be used in order to
set values of existing fields. In order to add new fields, you have to
add the values to the raw data array::

// Get the form.
$form = $crawler->filter('button')->form();

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

// Add fields to the raw values.
$values['task']['tag'][0]['name'] = 'foo';
$values['task']['tag'][1]['name'] = 'bar';

// Submit the form with the existing and new values.
$crawler = $this->client->request($form->getMethod(), $form->getUri(), $values,
$form->getPhpFiles());

// The 2 tags have been added to the collection.
$this->assertEquals(2, $crawler->filter('ul.tags > li')->count());

Where ``task[tags][0][name]`` is the name of a field 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());

.. index::
pair: Tests; Configuration

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