在javascript块中遍历twig数组

Question

使用Symfony2.3.​​4和PHP5.6.3.

我需要THE TITLE.

看,我有这个模板

{#new.html.twig#}

{% extends 'GCBundle::layout.html.twig' %}

{% block title %}{{parent()}} | Create chart {%endblock title %}

{% block content -%}
    {% if errors is defined %}
        {#not sure if I need this#}    
    {% endif %}

    <FORM class="form-horizontal" action="{{path('chart_create', { 'id' : entity.id })}}"
          method="post" {{ form_enctype(form) }}>
        <center><h3>Create chart</h3></center>

        {{ form_widget(form) }}
        <DIV class="form-actions">
            <BUTTON name="submit" type="submit"
                    class="btn btn-primary"><I class="glyphicon-check"></I>
                {{ 'Save'|trans }}</BUTTON>
            <a class="btn" href="{{ path('chart') }}">
                <I class="glyphicon-ban"></I> {{ 'Cancel'|trans }}</a>
        </DIV>
    </FORM>
{% endblock %}
{% block javascripts %}
    {{parent()}}
    {% if errors is defined %}
    <script type="text/javascript">
        alert({{errors}}); //THIS DOESN'T WORK, JUST SO U KNOW WHAT I NEED
    </script>
    {% endif %}
{% endblock %}

变量errors是一个简单的数组结构:$key --> <fieldname> 而且
$value --> <errormessage>,这个变量来自控制器,
到目前为止一直很正常.

现在,我需要在js块中使用该数组来警告错误或工具提示它或者什么,但我需要访问它的键和值,比如使用.each()函数.

样本错误:

array (size=1)
  'CI' => 'CI must be unique'

编辑:

array (size=2)
  'CI' => string 'CI must be unique' (length=53)
  'height' => string 'This value is not valid.' (length=24)

这是我在模板中{{dump(errors)}}时出现的错误.

看,我可以找到一个解决方法(例如)将数组拆分为两个数组(一个带键,另一个带值),每个数组都有自动生成的整数索引,所以我可以用for循环遍历它而不是一个.each()函数,我想要,但我认为这将是一个很好的时刻将这一个添加到"知识包",老实说听起来......

如果你可以请在你的评论中显示一些代码与想法...

EDIT2:

我试过json_encode这样的:

ChartController.php
$errors = array();
        foreach ($form as $field) {
            if ($field->getErrors()) {
                $errors [$field->getName()] = $field->getErrors();
                $errors[$field->getName()] = $errors[$field->getName()][0]->getMessage();
            }
        }

        return $this->render('GCBundle:Chart:new.html.twig', array(
                    'entity' => $entity,
                    'form' => $form->createView(),
                    'errors' => json_encode($errors),
        ));

现在,当我在模板中{{dump(errors)}}输出时:

string '{"CI":"CI must be unique","height":"This value is not valid."}' (length=102)

和我的实际javascript块:

new.html.twig
{% block javascripts %}
    {{parent()}}
    {{dump(errors)}}
    {% if errors is defined %}
    <script type="text/javascript">
        var temp = {{errors}};
        $.each(temp, function(k,v){
            alert(k);
        });

    </script>
    {% endif %}
{% endblock %}

我需要以某种方式遍历它,但如果我使用上面的代码,浏览器的控制台输出这个js错误:

SyntaxError:无效的属性id

EDIT3:

我检查了你的链接但是虽然它序列化$errorsOK,但它没有说明在javascript块中输出这些错误,这是我真正需要的.

看看我尝试过的所有方法,我希望你能从我得到的错误中得到一些东西:

1-

//With the serializer
//ChartController.php
$errors = $this->get('form_serializer')->serializeFormErrors($form, true, true);

        return $this->render('GCBundle:Chart:new.html.twig', array(
                    'entity' => $entity,
                    'form' => $form->createView(),
                    'errors' => $errors,
        ));

//new.html.twig
<script type="text/javascript">
var errors = {{errors}};
//WHETHER I USE A FOR LOOP
for(var err in errors){
    alert(err);
}
//OR AN $.EACH() FUNCTION
$.each(errors, function(k,v){
    alert(k);
});
</script>

错误:

An exception has been thrown during the rendering of a template  
("Notice: Array to string conversion in C:\xampp\htdocs\Projects\GC\app\cache  
\dev\twig\1a\00\0a022cd3a377dd20d520580dffea.php line 100") in  
GCBundle:Chart:new.html.twig at line 31.

2-

//Without the serializer
//ChartController.php
$errors = array();
foreach ($form as $field) {
    if ($field->getErrors()) {
        $errors [$field->getName()] = $field->getErrors();
        $errors[$field->getName()] = $errors[$field->getName()][0]->getMessage();
    }
}

return $this->render('GCBundle:Chart:new.html.twig', array(
    'entity' => $entity,
    'form' => $form->createView(),
    'errors' => json_encode($errors),
));

//new.html.twig
<script type="text/javascript">
var errors = {{errors}};
//WHETHER I USE A FOR LOOP
for(var err in errors){
    alert(err);
}
//OR AN **$.EACH()** FUNCTION
$.each(errors, function(k,v){
    alert(k);
});
</script>

错误:

SyntaxError: invalid property id

Answer 1

在这里,我终于找到了答案(Rasal Shukla),当我终于通过FireBug确定问题的根源时.

在控制器中我没有使用序列化器做同样的事情:

        $errors = array();
        foreach ($form as $field) {
            if ($field->getErrors()) {
                $errors [$field->getName()] = $field->getErrors();
                $errors[$field->getName()] = $errors[$field->getName()][0]->getMessage();
            }
        }

        return $this->render('GCBundle:Chart:new.html.twig', array(
                    'entity' => $entity,
                    'form' => $form->createView(),
                    'errors' => $errors,
        ));

并在模板中:

<script type="text/javascript">
    function getJSonObject(value) {
        return $.parseJSON(value.replace(/&quot;/ig, '"'));
    }

    var storeJSON = getJSonObject("{{errors|json_encode()}}");

    $.each(storeJSON, function(k,v){
        alert('Key = ' + k + '\n' + 'Value = ' + v);
    });
</script>

问题是每个函数都没有很好地处理",所以一旦我对来自控制器的变量错误这样做:getJSonObject("{{errors | json_encode()}}"),VOILÀ!!!

在各()函数的工作确定.