Symfony2 form override to work with AngulaJS

form_override.html.twig

{%- block form_start -%}
    {% set method = method|upper %}
    {%- if method in ["GET", "POST"] -%}
        {% set form_method = method %}
    {%- else -%}
        {% set form_method = "POST" %}
    {%- endif -%}

    <form name="{{ name }}" method="{{ form_method|lower }}" action="{{ action }}"{% for attrname, attrvalue in attr %} {{ attrname }}="{{ attrvalue }}"{% endfor %}{% if multipart %} enctype="multipart/form-data"{% endif %}>
    {%- if form_method != method -%}
        <input type="hidden" name="_method" value="{{ method }}" />
    {%- endif -%}
{%- endblock form_start -%}

{%- block widget_attributes -%}
    ng-init="{{ name }} = '{{ value| replace({"'":"\\'", "\\":"\\\\" })|e('html_attr') }}'"
    ng-model="{{ name }}"
    id="{{ id }}" name="{{ full_name }}"
    {%- if disabled %} disabled="disabled"{% endif -%}
    {%- if required %} required="required"{% endif -%}
    {%- for attrname, attrvalue in attr -%}
        {{- " " -}}
        {%- if attrname in ['placeholder', 'title'] -%}
            {{- attrname }}="{{ translation_domain is same as(false) ? attrvalue : attrvalue|trans({}, translation_domain) }}"
        {%- elseif attrvalue is same as(true) -%}
            {{- attrname }}="{{ attrname }}"
        {%- elseif attrvalue is not same as(false) -%}
            {{- attrname }}="{{ attrvalue }}"
        {%- endif -%}
    {%- endfor -%}
{%- endblock widget_attributes -%}

{% block form_row %}
    <div class="form_row">
        {{ form_label(form) }}
        {{ form_widget(form) }}
        {{ form_errors(form) }}
    </div>
{% endblock form_row %}