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Commit551a19b

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minor#10022 Document Twig test "rootform" (yceruto, javiereguiluz)
This PR was merged into the 2.8 branch.Discussion----------Document Twig test "rootform"Documents PRsymfony/symfony#25236 andcloses#8829, sorry for the delay.Commits-------cf355c9 Reworded the code comments423bfae Minor reword740803e Rewordfd433a1 Document Twig test "rootform"
2 parents3e93523 +cf355c9 commit551a19b

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‎reference/forms/twig_reference.rst‎

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<option {% if choice is selectedchoice(value) %} selected="selected"{% endif %} ...>
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.. _form-twig-rootform:
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rootform
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~~~~~~~~
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This test will check if the current ``form`` does not have a parent form view.
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..code-block::twig
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{# DON'T DO THIS: this simple check can't differentiate between a form having
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a parent form view and a form defining a normal form field called 'parent' #}
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{% if form.parent is null %}
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{{ form_errors(form) }}
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{% endif %}
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{# DO THIS: this check is always reliable, even if the form defines a field called 'parent' #}
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{% if form is rootform %}
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{{ form_errors(form) }}
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{% endif %}
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.. _`twig-reference-form-variables`:
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More about Form Variables

‎reference/twig_reference.rst‎

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Checks if ``selectedValue`` was checked for the provided choice field. Using
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this test is the most effective way.
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rootform
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~~~~~~~~
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..code-block::twig
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{% if form is rootform %}
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``form``
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**type**: ``FormView``
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Checks if the given ``form`` does not have a parent form view. This is the only
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safe way of testing it because checking if the form contains a field called
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``parent`` is not reliable.
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Global Variables
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----------------
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