Symfony 2，Twig：如何不逃避字段值（与backbonejs和symfony 2一起使用）(Symfony 2, Twig: how not to escape field value (used with backbonejs & symfony 2))

 我正在使用以下代码渲染原型： 
 
{{form_widget(form.get('prototype').myField, {'attr': {'value': '<%= myModelProperty %>'} }) }}
 
 BackboneJS应该读取此twig块生成的代码，并用某个model属性值替换<％= myModelProperty％>。 
 
 并且这不会发生，因为值在树枝中被转义，因此被替换为： 
 
&lt;%= viewport %&gt;
 
 我试图在* form_div_layout.html *文件中将值强制为RAW： 
 
> {% block field_widget %} {% spaceless %}
>     {% set type = type|default('text') %}
>     <input type="{{ type }}" {{ block('widget_attributes') }} {% if value is not empty %}value="{{ value|raw }}" {% endif %}/> {%
> endspaceless %} {% endblock field_widget %}
 
 但没有成功。 
 
 所以我的问题是如何避免在树枝中逃脱现场价值。 
 
 谢谢！ 
 
 编辑 
 
 解决方案：事实上，该方法是正确的，我必须使用“原始”过滤器来获取我的变量未转义。 我有一个autoescape块集，它可以使这个特定的输出成为可能，这就是为什么它必须是“未转义”的原因。 
 
 Symfony 2的Twig包提供了几个块来呈现表单数据，并且这些块使用特定的块来进行属性呈现，称为“{％block widget_attributes％}”。 
 
 我做的是编辑这个块（我有一个单独的模板文件，包含我所有的自定义块），所以我可以添加一层“如果这个值被转义”： 
 
{% block widget_attributes %}
{% spaceless %}
    id="{{ id }}" name="{{ full_name }}"{% if read_only %} disabled="disabled"{% endif %}{% if required %} required="required"{% endif %}{% if max_length %} maxlength="{{ max_length }}"{% endif %}{% if pattern %} pattern="{{ pattern }}"{% endif %}

    {% for attrname,attrvalue in attr %}
        {# Attribute value can be defined as an array. ['data']: contains the actual value, ['escape']: boolean (true if the value HAS to be escaped)#}
        {% if attrvalue.data is defined %}
            {% if not attrvalue.escape %}
                {{attrname}}="{{ attrvalue.data|raw }}"
            {% else %}
                {{attrname}}="{{ attrvalue.data|e }}"
            {% endif %}
        {% else %}
            {{attrname}}="{{attrvalue}}"
        {% endif %} 
    {% endfor %}

{% endspaceless %}
{% endblock widget_attributes %}
 
 从我的twig文件中调用： 
 
{{ form_widget(form.displays.get('prototype').myField, {'attr': {'value': { 'data': myvalue, 'escape': false } } }) }}
 
 在{{}} twig标签中打印值时完成转义，因此我之前所做的是将未转义的值发送到实际调用打印的块以及因此转义值的位置。 
 
 这适合我！ 谢谢！ 

I'm rendering a prototype using below code:
 
{{form_widget(form.get('prototype').myField, {'attr': {'value': '<%= myModelProperty %>'} }) }}
 
BackboneJS is supposed to read the code generated by this twig block, and replace the <%= myModelProperty %> by some model property value.
 
And this doesn't happen because the value is escaped in twig and thus replaced by: 
 
&lt;%= viewport %&gt;
 
I've tried to force the value to RAW in the *form_div_layout.html* file:
 
> {% block field_widget %} {% spaceless %}
>     {% set type = type|default('text') %}
>     <input type="{{ type }}" {{ block('widget_attributes') }} {% if value is not empty %}value="{{ value|raw }}" {% endif %}/> {%
> endspaceless %} {% endblock field_widget %}
 
but without success.
 
So my question is how not to escape the field value in twig.
 
Thanks!
 
EDIT
 
Solution: So in fact the method was right, I have to use the "raw" filter to get my variable not escaped. I've an autoescape block set that englobe this particular output which is why the reason it has to be "un-escaped".
 
Twig bundle of Symfony 2 provided several block to render form data, and those uses a specific block for attribute rendering called "{% block widget_attributes %}".
 
What I did is edit this block (I've a separated template file with all my customized blocks) so I can add a layer of "should this value be escaped or not":
 
{% block widget_attributes %}
{% spaceless %}
    id="{{ id }}" name="{{ full_name }}"{% if read_only %} disabled="disabled"{% endif %}{% if required %} required="required"{% endif %}{% if max_length %} maxlength="{{ max_length }}"{% endif %}{% if pattern %} pattern="{{ pattern }}"{% endif %}

    {% for attrname,attrvalue in attr %}
        {# Attribute value can be defined as an array. ['data']: contains the actual value, ['escape']: boolean (true if the value HAS to be escaped)#}
        {% if attrvalue.data is defined %}
            {% if not attrvalue.escape %}
                {{attrname}}="{{ attrvalue.data|raw }}"
            {% else %}
                {{attrname}}="{{ attrvalue.data|e }}"
            {% endif %}
        {% else %}
            {{attrname}}="{{attrvalue}}"
        {% endif %} 
    {% endfor %}

{% endspaceless %}
{% endblock widget_attributes %}
 
Called from my twig file:
 
{{ form_widget(form.displays.get('prototype').myField, {'attr': {'value': { 'data': myvalue, 'escape': false } } }) }}
 
The escape is done when printing the value so in the {{ }} twig tag, so what I was doing earlier was sending an unescaped value to a block where the print is actually called and where the value was thus escaped.
 
This works for me! thanks!

原文：https://stackoverflow.com/questions/11417510